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* Home
* About
* Who are we ?
* Subjectivist, Objectivist or Inbetweenivist ? (website links)
* Contact
* solderdude
* Headphones
* Budget, a starting point
* Earpads
* recommended ones
* taming the treble
* measurements
* 1MORE Triple Driver Over-Ear
* AKG
* K92
* K141 monitor
* K181
* K240 monitor
* K240 studio
* K361
* K371
* K400
* K500
* K501
* K514-mkII
* K518
* K550
* K551
* K612
* K701
* K702
* K712
* K7XX (Drop)
* K812
* N60NC
* Audeze
* EL-8 Titanium
* EL-8 open
* LCD-2 Classic
* LCD-2 (Fazor)
* LCD-3 (Fazor)
* LCD-4
* LCD-4z
* LCD-MX4
* LCD-X (Fazor)
* LCD-XC
* Sine
* audio-technica
* ATH-A700X
* ATH-AD700X
* ATH-M40X
* ATH-M50X
* ATH-M50X LE
* ATH-MSR7
* ATH-SR9
* AudioQuest NightHawk
* Ausdom
* ANC7
* M05
* Austrian Audio
* Hi-X60
* Avantone Pro Planar
* Beats
* behringer BH 470
* Beyerdynamic
* Amiron Home
* Amiron Wireless
* Custom One Pro
* DT150 (250Ω)
* DT240 Pro
* DT250 (250Ω)
* DT 700 PRO X
* DT770 Pro (32Ω)
* DT770 Pro (250Ω)
* DT880 Edition (250Ω)
* DT880 Edition (600Ω)
* DT880 Black Special Edition
* DT 900 PRO X
* DT990 Pro (250Ω)
* DT990 (600Ω)
* DT1350
* DT 1770 Pro
* DT 1990 Pro
* TYGR 300 R
* T1 (mk2)
* T5P (mk2)
* T50P
* T51p
* T51i
* Bose
* QC-25
* QC35-II
* Bowers & Wilkins
* P5 (Series 2)
* PX
* Brainwavz HM5
* BRAINZ H10
* Campfire Audio Cascade
* Creative
* Aurvana Live! 2
* Aurvana Live! SE
* Sound BlasterX H7 (Tournament)
* DAP HP-280 Pro
* Denon
* AH-D600
* AH-D5200
* AH-GC20
* AH-MM200
* Devine PRO 4000
* FiiO FT3
* Final
* D8000
* Sonorous III
* Focal
* Elear
* Clear
* Listen
* Utopia
* Fostex
* T50RP (mk2)
* T50RP mk3
* TH-X00 Mahogany (Drop)
* fun generation HP5
* GEWA HP eight
* Grado
* GS2000e
* SR125i
* Grundig EE1178
* HIFIMAN
* Ananda
* Edition S
* Edition X (v2)
* Edition XS (2023)
* Edition XX (Drop)
* HE-6 (4 screw)
* HE-350 (Drop)
* HE-35X (Drop)
* HE-400i
* HE-400i (2020)
* HE-400S
* HE-400se
* HE-560
* HE-1000
* HE-R7DX
* Sundara
* Sundara (2021)
* Susvara
* Jays
* JBL
* E40 BT
* LIVE 500 BT
* TUNE 710 BT
* Koss
* KSC35
* KSC75
* KPH30i
* PortaPro
* Mackie MC-150
* Marshall Major II
* Master & Dynamic MH40
* Meze Audio
* 99 classics
* 99 neo
* Mitchell & Johnson JP1 DJ
* MrSpeakers
* ÆON Closed
* ÆON Open
* Ether
* Ether Flow
* Ether C Flow
* NAD VISO HP50
* OLLO Audio
* S4R (1.1)
* S4X (1.1) Reference
* S5X (1.0)
* Pendulumic Stance S1+
* Philips
* A5 Pro
* EM6721
* Fidelio X1
* Fidelio X2HR
* SBC-HP400
* SHB-9850NC
* SHL-5905 (CitiScape Uptown)
* SHP9000
* SHP9500
* SHP9600
* Pioneer
* SE-300
* SE-305
* SE-MS5T
* RadioEar DD450
* Repeat Prince
* Roland
* RH-5
* RH-A30
* RH-300
* Røde NTH-100
* Sennheiser
* HD 2.20
* HD 4.40 BT
* HD25-1
* HD238
* HD250 Linear II
* HD320
* HD400S
* HD414
* HD420 SL
* HD430
* HD438
* HD440-II
* HD477
* HD520
* HD540 Reference
* HD540 Reference II
* HD545 Reference
* HD559
* HD560 Ovation
* HD560 Ovation II
* HD560S
* HD569
* HD570 Symphony
* HD58X Jubilee (Drop)
* HD590 prestige
* HD595
* HD598 CS
* HD599
* HD600
* HD630VB
* HD650
* HD660S
* HD660S2
* HD700
* HD800
* HD800S
* HD820
* Momentum 2 over-ear
* PXC 550-II
* Shure
* SRH-440
* SRH-840
* SRH-940
* SRH-1440
* SRH-1540
* SRH-1840
* Sony
* MDR-1A
* MDR-7509
* MDR-100AAP (hear.on)
* MDR-7509HD
* MDR-XB500
* MDR-ZX110
* WH-CH700N
* WH-1000X-M3
* Status Audio CB-1
* Stax SR-5
* Superlux
* HD330
* HD562
* HD572-SP
* HD581 (prototype)
* HD660 Pro
* HD662-EVO
* HD668B
* HD671
* HD672
* HD681
* HD681-EVO
* HD685
* HD687
* HD688
* t.bone HD-990
* Takstar PRO 82
* Tascam TH-02
* Teufel Aureol
* Ultrasone
* V-MODA
* Crossfade M100
* Crossfade II wireless
* Yamaha
* HPH-MT7
* HPH-MT220
* D.I.Y. headphones
* fake
* AirPods Max
* ATH-MSR7
* Beats Solo
* rubbish & crap
* Headphone attenuation adapter
* Headphone Driver types
* Over the ear
* Power amp adapter
* On the ear
* In the ear
* reviews
* Kameleon
* Passive filters
* For sale
* Digital
* PC – Software
* Foobar 2000 for Dummies (Part 1) – General Setup
* Foobar 2000 for Dummies (Part 2) – Playing DSD – SACD plugin
* Compressing DSD files with Wavpack 5
* Digital Audio Players
* Learn
* articles
* Burn-in / break-in
* Power Supply, Filters
* power supply types
* Why SMPS fail
* Mains filters
* transformer basics
* Rectifiers
* regulator basics
* snubbering
* common mode currents
* ground
* power, efficiency, levels, balanced, impedance
* Do deciBells ring a bell ?
* Fletcher-Munson
* how to interpret graphs
* Frequency response
* smoothing & compensation
* Impedance
* Harmonic Distortion
* 3rd party plots
* CSD/waterfall & spectrum
* squarewave and impulse
* Neutral sound, an utopia ?
* Crossfeed
* Amplifiers
* Solid State
* Discrete
* Op-amp
* Hybrid
* All Tube
* Dynamic Range
* Cables
* downloads
* Schematics
* Headphone related
* Amplifier
* Various
* Music
* Baroque
* Album reviews
* Classical
* Album reviews
* Romantic
* Album reviews
* Modern
* Album reviews
* Folk
* Album reviews
* Jazz
* Album reviews
* Rock & Pop
* Album reviews
* YELLO
DIY-AUDIO-HEAVEN
Enjoy music through headphones on a low budget
Stay updated via RSS
--------------------------------------------------------------------------------
* START HERE
* About
* Who are we ?
* Subjectivist, Objectivist or Inbetweenivist ? (website links)
* Contact
* solderdude
* Headphones
* Budget, a starting point
* Earpads
* recommended ones
* taming the treble
* measurements
* 1MORE Triple Driver Over-Ear
* AKG
* K92
* K141 monitor
* K181
* K240 monitor
* K240 studio
* K361
* K371
* K400
* K500
* K501
* K514-mkII
* K518
* K550
* K551
* K612
* K701
* K702
* K712
* K7XX (Drop)
* K812
* N60NC
* Audeze
* EL-8 Titanium
* EL-8 open
* LCD-2 Classic
* LCD-2 (Fazor)
* LCD-3 (Fazor)
* LCD-4
* LCD-4z
* LCD-MX4
* LCD-X (Fazor)
* LCD-XC
* Sine
* audio-technica
* ATH-A700X
* ATH-AD700X
* ATH-M40X
* ATH-M50X
* ATH-M50X LE
* ATH-MSR7
* ATH-SR9
* AudioQuest NightHawk
* Ausdom
* ANC7
* M05
* Austrian Audio
* Hi-X60
* Avantone Pro Planar
* Beats
* behringer BH 470
* Beyerdynamic
* Amiron Home
* Amiron Wireless
* Custom One Pro
* DT150 (250Ω)
* DT240 Pro
* DT250 (250Ω)
* DT 700 PRO X
* DT770 Pro (32Ω)
* DT770 Pro (250Ω)
* DT880 Edition (250Ω)
* DT880 Edition (600Ω)
* DT880 Black Special Edition
* DT 900 PRO X
* DT990 Pro (250Ω)
* DT990 (600Ω)
* DT1350
* DT 1770 Pro
* DT 1990 Pro
* TYGR 300 R
* T1 (mk2)
* T5P (mk2)
* T50P
* T51p
* T51i
* Bose
* QC-25
* QC35-II
* Bowers & Wilkins
* P5 (Series 2)
* PX
* Brainwavz HM5
* BRAINZ H10
* Campfire Audio Cascade
* Creative
* Aurvana Live! 2
* Aurvana Live! SE
* Sound BlasterX H7 (Tournament)
* DAP HP-280 Pro
* Denon
* AH-D600
* AH-D5200
* AH-GC20
* AH-MM200
* Devine PRO 4000
* FiiO FT3
* Final
* D8000
* Sonorous III
* Focal
* Elear
* Clear
* Listen
* Utopia
* Fostex
* T50RP (mk2)
* T50RP mk3
* TH-X00 Mahogany (Drop)
* fun generation HP5
* GEWA HP eight
* Grado
* GS2000e
* SR125i
* Grundig EE1178
* HIFIMAN
* Ananda
* Edition S
* Edition X (v2)
* Edition XS (2023)
* Edition XX (Drop)
* HE-6 (4 screw)
* HE-350 (Drop)
* HE-35X (Drop)
* HE-400i
* HE-400i (2020)
* HE-400S
* HE-400se
* HE-560
* HE-1000
* HE-R7DX
* Sundara
* Sundara (2021)
* Susvara
* Jays
* JBL
* E40 BT
* LIVE 500 BT
* TUNE 710 BT
* Koss
* KSC35
* KSC75
* KPH30i
* PortaPro
* Mackie MC-150
* Marshall Major II
* Master & Dynamic MH40
* Meze Audio
* 99 classics
* 99 neo
* Mitchell & Johnson JP1 DJ
* MrSpeakers
* ÆON Closed
* ÆON Open
* Ether
* Ether Flow
* Ether C Flow
* NAD VISO HP50
* OLLO Audio
* S4R (1.1)
* S4X (1.1) Reference
* S5X (1.0)
* Pendulumic Stance S1+
* Philips
* A5 Pro
* EM6721
* Fidelio X1
* Fidelio X2HR
* SBC-HP400
* SHB-9850NC
* SHL-5905 (CitiScape Uptown)
* SHP9000
* SHP9500
* SHP9600
* Pioneer
* SE-300
* SE-305
* SE-MS5T
* RadioEar DD450
* Repeat Prince
* Roland
* RH-5
* RH-A30
* RH-300
* Røde NTH-100
* Sennheiser
* HD 2.20
* HD 4.40 BT
* HD25-1
* HD238
* HD250 Linear II
* HD320
* HD400S
* HD414
* HD420 SL
* HD430
* HD438
* HD440-II
* HD477
* HD520
* HD540 Reference
* HD540 Reference II
* HD545 Reference
* HD559
* HD560 Ovation
* HD560 Ovation II
* HD560S
* HD569
* HD570 Symphony
* HD58X Jubilee (Drop)
* HD590 prestige
* HD595
* HD598 CS
* HD599
* HD600
* HD630VB
* HD650
* HD660S
* HD660S2
* HD700
* HD800
* HD800S
* HD820
* Momentum 2 over-ear
* PXC 550-II
* Shure
* SRH-440
* SRH-840
* SRH-940
* SRH-1440
* SRH-1540
* SRH-1840
* Sony
* MDR-1A
* MDR-7509
* MDR-100AAP (hear.on)
* MDR-7509HD
* MDR-XB500
* MDR-ZX110
* WH-CH700N
* WH-1000X-M3
* Status Audio CB-1
* Stax SR-5
* Superlux
* HD330
* HD562
* HD572-SP
* HD581 (prototype)
* HD660 Pro
* HD662-EVO
* HD668B
* HD671
* HD672
* HD681
* HD681-EVO
* HD685
* HD687
* HD688
* t.bone HD-990
* Takstar PRO 82
* Tascam TH-02
* Teufel Aureol
* Ultrasone
* V-MODA
* Crossfade M100
* Crossfade II wireless
* Yamaha
* HPH-MT7
* HPH-MT220
* D.I.Y. headphones
* fake
* AirPods Max
* ATH-MSR7
* Beats Solo
* rubbish & crap
* Headphone attenuation adapter
* Headphone Driver types
* Over the ear
* Power amp adapter
* On the ear
* In the ear
* reviews
* Kameleon
* Passive filters
* For sale
* Digital
* PC – Software
* Foobar 2000 for Dummies (Part 1) – General Setup
* Foobar 2000 for Dummies (Part 2) – Playing DSD – SACD plugin
* Compressing DSD files with Wavpack 5
* Digital Audio Players
* Learn
* articles
* Burn-in / break-in
* Power Supply, Filters
* power supply types
* Why SMPS fail
* Mains filters
* transformer basics
* Rectifiers
* regulator basics
* snubbering
* common mode currents
* ground
* power, efficiency, levels, balanced, impedance
* Do deciBells ring a bell ?
* Fletcher-Munson
* how to interpret graphs
* Frequency response
* smoothing & compensation
* Impedance
* Harmonic Distortion
* 3rd party plots
* CSD/waterfall & spectrum
* squarewave and impulse
* Neutral sound, an utopia ?
* Crossfeed
* Amplifiers
* Solid State
* Discrete
* Op-amp
* Hybrid
* All Tube
* Dynamic Range
* Cables
* downloads
* Schematics
* Headphone related
* Amplifier
* Various
* Music
* Baroque
* Album reviews
* Classical
* Album reviews
* Romantic
* Album reviews
* Modern
* Album reviews
* Folk
* Album reviews
* Jazz
* Album reviews
* Rock & Pop
* Album reviews
* YELLO
HOME
Posted: March 17, 2013 in Home Page
For remarks, discussions, questions, about this website or to contact us please
visit our FORUM.
When new information is added it will be shown below in the ‘whats new‘ section
below.
LIST OF MEASURED HEADPHONES
WHAT’S NEW ?
Below are postings in chronological order (latest ones on top)
↑
——————– 2024 ————————
——————– 2023 ————————
↓
below: date format MM-DD
> added 12-24: Bowers & Wilkins P5 (Series 2) measurements and evaluation
> added 12-16: Repeat Prince measurements and evaluation
> added 11-24: Sennheiser HD 540 Reference II measurements, evaluation and
repair
> added 11-23: Sony MDR-7509 measurements and evaluation
> added 11-22: Roland RH-A30 measurements and evaluation
> added 11-19: Sennheiser HD 560 Ovation measurements and evaluation
> added 11-18: Denon AH-D5200 measurements and evaluation.
> added 11-11: Avantone Pro Planar measurements and evaluation.
> added 11-03: RadioEar DD450 measurements.
> added 09-30: Sennheiser HD540 Reference measurements, evaluation and repair.
updated 09-28: Sennheiser HD560S (2022 version) measurements and comparison
updated 09-22: Sennheiser HD250 linear-II measurements, modification and
repair.
> added 09-17: Sennheiser HD440-II measurements, evaluation and repair.
> added 09-16: Beyerdynamic DT 770 Pro (32Ω) measurements, evaluation and
modifications
> added 09-14: Drop (HIFIMAN) HE-R7DX measurements and evaluation
> added 09-02: Sennheiser HD545 Reference measurements, evaluation and repair.
> added 08-27: Sennheiser HD598CS measurements, evaluation and filter.
> added 08-06: measurements of some fake headphones
> added 07-31: audio-technica ATH-M50X measurements, evaluation and pads
updated 07-01: headphone power table (2023) power requirement information for
about 800 over- and on-ear wired headphone models.
> added 06-16: GEWA HP eight measurements and evaluation
updated 06-11: selling some reviewed headphones.
> added 06-04: HIFIMAN Edition XS measurements, evaluation and filter.
> added 05-26: FiiO FT3 measurements, evaluation and easy fix.
> added 05-19: Sennheiser HD 477 measurements and evaluation.
> added 05-18: AKG K141 monitor (600Ω) measurements and evaluation.
> added 04-24: AKG K240 monitor (600Ω) measurements and evaluation.
> added 04-22: Bowers & Wilkins PX measurements and evaluation.
> added 04-07: Sennheiser HD 660S2 measurements and evaluation.
> added 03-17: Yamaha HPH-MT7 measurements and evaluation.
> added 02-18: Superlux HD668B measurements, evaluation and modification.
> added 02-17: JBL LIVE 500 BT measurements and evaluation.
> added 02-10: Austrian Audio Hi X60 measurements and evaluation.
> added 02-03: OLLO S5X (1.0) measurements and evaluation.
> added 01-16: Philips EM6721 measurements and evaluation.
↑
——————– 2023 ————————
——————– 2022 ————————
↓
below: date format MM-DD
> added 12-19: fun generation HP5 measurements, evaluation, modification and
pads
updated 11-25: Sennheiser HD560S article with aftermarket pad measurements
> added 11-23: Shure SRH-940 measurements, evaluation, modification and pads
> added 11-06: Creative Aurvana Live! SE measurements, evaluation and
modifications
> added 10-24: audio-technica ATH-AD700X measurements, evaluation and
modification
updated 10-17: Fixed some broken links, Foobar 2000 for Dummies (Part 1)
> added 10-15: Creative Aurvana Live! 2 measurements, evaluation and
modifications
updated 09-19: Beyerdynamic DT250-250 article (L-R imbalance)
> added 09-18: Sennheiser HD 520 measurements, evaluation and pads
> added 09-17: Sennheiser HD 400S measurements, evaluation and modification
> added 09-15: Denon AH-MM200 measurements and evaluation
updated 09-05: Foobar 2000 for Dummies (Part 2)
> added 09-01: HIFIMAN Sundara (2021) measurements and evaluation
> added 07-17: Status Audio: CB-1 measurements and evaluation
updated 07-09: OLLO Audio S4X (1.1) Reference article (filtering)
> added 07-07: Philips SHP9600 measurements and evaluation
> added 05-21: Mackie MC-150 measurements, evaluation and modifications
> added 05-15: OLLO Audio S4X (1.1) Reference measurements and evaluation
> added 05-14: OLLO Audio S4R (1.1) measurements and evaluation
> added 05-01: AKG K240 studio measurements and evaluation
> added 04-30: HIFIMAN HE400i (2020) measurements and evaluation
updated 04-18: Beyerdynamic DT990/250 article
> added 04-16: Beyerdynamic DT 700 PRO X measurements, evaluation and
modification.
updated 04-05: moved the headphone filter page
> added 04-02: Røde NTH-100 measurements and evaluation
> added 03-18: Brainwavz HM5 measurements and evaluation
> added 02-26: AKG K514-mkII measurements and evaluation
> added 02-06: Beyerdynamic DT 240 Pro measurements, evaluation and modification
> added 02-03: Pioneer SE-M5ST measurements and evaluation
> added 02-02: audio-technica ATH-A700X measurements and evaluation
> added 01-24: Beyerdynamic T51i measurements and evaluation
> added 01-23: Sennheiser HD430 measurements and evaluation
updated 01-09: HIFIMAN HE35X article, added modification.
↑
——————– 2022 ————————
——————– 2021 ————————
↓
below: date format MM–DD
updated 12-30: Selling some headphones (within E.U. only, sorry)
> added 12-24: Sony MDR-ZX110 measurements and evaluation
> added 12-18: BRAINZ H10 measurements and evaluation
> added 12-10: HIFIMAN HE400se measurements and evaluation
> added 12-05: Koss KPH30i measurements, evaluation and modification
> added 11-29: Sennheiser PXC550-II measurements and evaluation
> added 11-24: Sony MDR-7509 HD measurements and evaluation
> added 11-11: JBL TUNE 710 BT measurements and evaluation
> added 11-01: Beyerdynamic DT 900 PRO X measurements and evaluation
> added 10-04: Sennheiser HD590 Prestige measurements and evaluation
> added 10-03: Beyerdynamic TYGR 300 R measurements and evaluation
> added 10-02: Devine PRO 4000 measurements, evaluation and modification
> added 09-16: audio-technica ATH-M50X measurements and evaluation
> added 08-23: Sennheiser HD595 (SE) measurements and evaluation
> added 08-22: DAP audio: HP-280 Pro measurements, evaluation and modification
> added 07-25: Sennheiser HD560 Ovation II measurements, evaluation and
modification
> added 07-16: Sennheiser HD414 (original 2kΩ version) measurements
updated 07-09: Measured the new (2021) Sennheiser pads for HD6** series in
article about earpads
> added 05-22: Sennheiser HD570 Symphony measurements and evaluation
updated 05-02: HIFIMAN HE560(v2) measurements
> added 04-18: Shure SRH-440 measurements and evaluation
> added 04-10: Superlux HD330 measurements, evaluation and modification.
updated 04-03: added Sennheiser HD800 replacement pad measurements.
updated 03-25: AKG K702 measurements, added bass port mod measurements
> added 02-22: Behringer BH-470 measurements, evaluation and modification
> added 02-06: Article about earpads
> added 01-23: Superlux HD660Pro (proto) measurements, evaluation and
modifications
> added 01-19: audio-technica ATH-SR9 measurements, evaluation and modifications
updated 01-06: Audeze Sine measurements, evaluation and modifications
↑
——————– 2021 ————————
——————– 2020 ————————
↓
below: date format MM–DD
updated 12-13: Sennheiser HD800S article
> added 12-13: AKG: N60NC (wired) measurements and evaluation
> added 11-16: Sennheiser HD559 measurements, evaluation and modifications.
> added 11-02: Inner|Fidelity measurement collection PDF completed &
alphabetical
updated 10-08: headphone power table
> added 09-24: Sennheiser HD560S measurements and evaluation
updated 08-08: AKG K702 K712 & K7XX measurements .
> added 08-01: AKG K712 measurements and evaluation.
> added 07-26: Beyerdynamic DT 880-600 measurements and evaluation.
> added 06-27: Shure SRH-1440 measurements and evaluation
> added 06-24: Shure SRH-840 measurements and evaluation
updated 06-14: DT880 Black SE and HD800 pages, added new info
> added 06-07: Beyerdynamic DT 880 Black SE measurements, modifications
> added 04-30: AKG K361 measurements and evaluation.
> added 04-19: AKG K371 measurements and evaluation.
> added 03-25: Roland RH-5 measurements and evaluation.
> added 02-03: AKG K702 measurements, evaluation and treble ‘fix’
updated 02-02: measurements added of a ‘veiled’ HD650 (not a myth)
> added 01-22: Shure SRH-1840 measurements and evaluation.
> added 01-19: Shure SRH-1540 measurements and evaluation.
↑
——————– 2020 ————————
——————– 2019 ————————
↓
below: date format MM–DD
> added 11-14: Philips Fidelio X2HR measurements and evaluation.
> added 10-11: audio-technica ATH-MSR7 measurements and evaluation.
> added 10-10: Yamaha HPH-MT220 measurements and evaluation.
> added 09-15: more passive filters
> added 08-30: AKG K812 measurements, evaluation.
updated 08-17: Beyerdynamic DT1770 measurements, evaluation and modification
updated 08-11: Beyerdynamic DT1990 measurements, evaluation and modification
> added 07-13: vintage Sennheiser HD420 SL restoration and evaluation
> added 07-11: Sennheiser HD 4.40 BT measurements and evaluation
> added 06-16: 1MORE Triple Driver Over-Ear measurements and evaluation
updated 06-16: NAD VISO HP50 added passive filter schematic
updated 06-15: measurements of recent Romanian produced HD58X
> added 05-19: Grundig EE1178 (BlueTooth) measurements and evaluation
> added 05-19: Denon AH-GC20 (B.T. / N.C.) measurements and evaluation
> added 05-15: Bose QC35-II (B.T. / N.C.) measurements and evaluation
> added 04-03: HIFIMAN HE35X measurements and evaluation
> added 03-31: AKG K701 measurements and evaluation
> added 03-10: Sony WH-1000X-M3 (B.T. / N.C.) measurements and evaluation
> added 03-09: Sony WH-CH700N (B.T. / N.C.) measurements and evaluation
> added 01-24: HIFIMAN Edition XX measurements, evaluation, modification
> added 01-12: AKG K7XX (Massdrop) measurements and evaluation
updated 01-02: Superlux HD681 measurements
↑
——————– 2019 ————————
——————– 2018 ————————
↓
below: date format MM–DD
updated 12-27: Massdrop HD58X modifications article
> added 12-08: Marshall Major II Bluetooth measurements and evaluation
updated 11-18: Some additional info on Koss KSC75 earphones
> added 10-21: A for sale section where some reviewed gear is up for sale
> added 10-17: Beyerdynamic T51p measurements and evaluation
updated 10-07: Beyerdynamic Custom One Pro with COP–Plus measurements.
> added 09-29: NAD VISO HP50 measurements and evaluation
> added 08-26: Beyerdynamic Custom One Pro measurements, evaluation and
modifications
> added 08-25: Pioneer SE-305 measurements and evaluation
> added 08-19: Campfire Audio Cascade measurements and evaluation
> added 08-18: Audeze LCD-4z measurements and evaluation
> added 08-17: Sennheiser HD820 measurements and evaluation
> added 08-13: Powerbank output keep-alive circuit for powering low current
devices
> added 07-02: MrSpeakers Ether measurements and evaluation
> added 07-01: Superlux HD687 measurements, mods and evaluation
updated 07-01: Sennheiser HD58X Jubilee added some plots
> added 06-27: AKG K92 measurements and evaluation
> added 06-26: Beyerdynamic Amiron Wireless measurements
> added 06-25: Sennheiser HD599 measurements
updated 06-25: Sennheiser HD58X Jubilee measurements and evaluation
> added 06-24: Audeze LCD-2 Classic measurements
> added 06-24: Audeze LCD-MX4 measurements
> added 06-23: Sennheiser HD569 measurements
> added 06-23: HIFIMAN Sundara measurements
> added 06-23: Final D8000 measurements and evaluation
> added 06-21: HIFIMAN Ananda measurements and evaluation
> added 06-08: Mitchell & Johnson JP1 DJ measurements
> added 05-26: Beyerdynamic DT 880 Edition treble modification
updated 05-20: 3rd-party-plots useful links to other measurement sites
updated 04-24: Beyerdynamic DT 880 Edition (250Ω) measurements
updated 04-07: Kameleon filter list.
> added 04-01: Superlux HD671 measurements and evaluation
updated 03-17: Passive filter for Master & Dynamic MH40 added
> added 03-14: Master & Dynamic MH40 measurements
> added 03-12: Beyerdynamic DT 880 Edition (250Ω) measurements
> added 02-17: Superlux HD672 measurements and evaluation
> added 02-10: Takstar PRO 82 monitor measurements and evaluation
updated 01-21: Superlux HD688 production version measurements
↑
——————– 2018 ————————
——————– 2017 ————————
↓
below: date format MM–DD
updated 12-26: pdf with more Sennheiser HD58X measurements and experiments
> added 12-21: Sennheiser HD58X Jubilee (Massdrop) measurements and impressions
> added 11:25: MrSpeakers ÆON Open measurements and impressions
> added 11:23: Focal Clear measurements and impressions
> added 11:02: MrSpeakers ÆON Closed measurements
> added 11:02: MrSpeakers Ether flow (open) measurements
> added 11:02: MrSpeakers Ether C flow (closed) measurements
updated 11:02: Sennheiser HD660S measurements with HD600 comparo.
> added 10-28: HIFIMAN Susvara measurements
> added 10-28: Grado GS2000e measurements
> added 10-28: Audeze LCD-4 measurements
> added 10:26: JBL E40 BT measurements
> added 10:25: Sennheiser HD800S measurements
> added 10:24: Sennheiser HD660S measurements.
updated 10-08: Denon AH-D600 modifications measurements.
updated 09-21: Sennheiser HD250 linear II measurements.
updated 09-19: AKG K501 measurements with some experiments.
> added 09-08: AKG K501 measurements.
> added 09-06: HIFIMAN HE-6 (early 4-screw version) measurements.
> added 08-10: Creative Sound BlasterX H7 Tournament measurements.
> added 07-20: HIFIMAN HE1000 measurements
> added 07-19: HIFIMAN Edition S and Edition X measurements
> added 07-18: HIFIMAN HE400S and HE-560 measurements
updated 07-17: HIFIMAN HE400i measurements
> added 07-16: Beyerdynamic T1 (mk2) and T5P (mk2) measurements
> added 07-16: Beyerdynamic DT 1770 Pro and DT 1990 Pro measurements
> added 07-15: Focal Utopia and Listen measurements
> added 07-14: Focal Elear measurements
> added 07-13: Sennheiser Momentum 2 (over-ear) measurements
> added 07-12: Sennheiser HD250 linear II measurements
> added 07-11: Sennheiser HD630VB measurements
> added 07-10: Sennheiser HD700 measurements
> added 07-10: Sennheiser HD 2.20 measurements
> added 07-09: V-MODA crossfade II wireless measurements
> added 07-08: V-MODA Crossfade M100 measurements
> added 07-08: Final Sonorous III measurements
> added 07-07: Denon AH-D600 measurements
> added 07-07: Audeze Sine measurements
> added 07-05: Audeze LCD-3, LCD-X and LCD-XC measurements
> added 07-05: Meze 99 classics and 99 neo measurements.
> added 07-04: Audeze EL-8 open, EL-8 Titanium and LCD-2
> added 07-03: Beyerdynamic Amiron measurements.
updated 07-01: Foobar Tutorials
updated 06-23: Cables article
> added 06-17: Balanced attenuators in attenuator and power-amp sections.
updated 06-04: Foobar tutorial part 2
> added 06-03: Battery circuit change for Kameleon and Kameleon 2 portable amps.
updated 06-01: supported Kameleon modules list
updated 04-17: more Roland RH-300 measurements.
> added 04-08: Roland RH-300 measurements.
updated 03-18: changed the how to interpret graphs tree-structure
updated 03-12: added info to the how to interpret graphs article
> added 03-08: t.bone HD 990 D headphone in measurements
updated 03-03: supported Kameleon modules list
> added 03-01: Superlux HD687 (prototype) measurements
updated 02-18: Fostex TH-X00 and Fostex T50RP mk3 measurements
> added 02-11: Fostex TH-X00 (Mahogany) in measurements|Fostex
> added 02-07: Fostex T50RP mk3 in measurements|Fostex
> added 02-05: Superlux HD688 (prototype) measurements
> added 01-24: Compressing DSD files with Wavpack 5 tutorial
updated 01-09: Kameleon-2 Desktop and Portable amp build manuals
updated 01-02: Headphone attenuator adapter article
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM–DD
updated 12-31: Foobar tutorials
updated 12-08: ATH-MSR7 turned out to be fake, moved to crap section
> added 11-26: Dedicated Kameleon page
updated 11-16: HiFiman HE-350 measurements
updated 10-29: supported headphone list for Kameleon
updated 10-20: HiFiman HE-350 measurements (2nd HE350 + seal)
> added 10-19: Veclan Monk+ in measurements
> added 10-19: FAKE audio-technica ATH-MSR7 measurements
updated 10-12: Re-arranged the measurements section
> added 10-08: fix for HiFiman HE-350 treble in measurements|HIFIMAN
> added 10-08: HiFiman HE-350 measurements in measurements|HIFIMAN
updated 10-03: Kameleon articles (more filter modules added) in
schematics|headphone
> added 09-17: Sony MDR-100AAP measurements in measurements|Sony
> added 09-15: Pre-production Superlux HD581 in measurements|Superlux
> added 09-12: Sony MDR-1A measurements in measurements|Sony
> added 09-04: In-line Kameleon manual
updated 09-04: Kameleon-2 desktop and portable amp manuals
> added 08-24: My views on ‘neutral sound‘ in learn
> added 08-06: Influence of Fletcher-Munson on listening pleasure in learn
> added 07-28: Taming the treble article in headphones|taming the treble
updated 07-27: How to interpret graphs, added inner|fidelity compensation.
> added 06-19: Philips SHB-9850NC measurements in measurements|Philips
updated 06-01: headphone power table in learn|articles
> added 06-01: Beyerdynamic DT150 measurements in measurements|Beyerdynamic
updated 05-26: Headphone adapter article in learn|Power-amp-adapter
updated 05-21: Superlux HD662-EVO measurements in measurements|Superlux
updated 05-14: info about SMPS vs LPS power supplies in learn|power supply types
>added 05-04: Ausdom ANC7 measurements in measurements|Ausdom
>added 04-15: Schematic G1217 project Ember rev. 2.1 in schematics|amplifier
updated 03-09 AudioQuest NightHawk cable in measurements|AudioQuest
>added 03-03: AudioQuest NightHawk measurements in measurements|AudioQuest
> added 02-23: Kameleon 2 DESKTOP build manual
updated 02-21: Kameleon 2 PORTABLE build manual
> added 01-31: Superlux HD662-EVO measurements in measurements|Superlux
> added 01-28: HiFiMan HE-400i measurements in measurements|HIFIMAN
> added 01-24: Beats Studio Wireless measurements in measurements|Beats
updated 01-24: Ausdom M05 measurements in measurements|Ausdom
> added 01-08: Sennheiser HD700 passive filter in schematics|headphone related
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM-DD
updated 12-24: Some headphone measurements have been updated.
> added 12-24: Bose Quiet Comfort 25 in measurements|Bose
> added 12-19: Bravo Ocean modifications in schematics|amplifiers
> added 12-16: Kameleon-2 article.
updated 12-13: Philips cityscape uptown in measurements|Philips
updated 12-02: Superlux HD681 and HD681-EVO in measurements|Superlux
> added 12-02: Superlux HD572-SP measurements in measurements|Superlux
> added 11-19: Passive filters for some Hifiman models in schematics|headphone
> added 11-18: Sennheiser HD800 measurements in measurements|Sennheiser
> added 11-13: Foobar tutorial part 3 SACD plugin in digital|software
updated 11-12: Yet some more measurements in Sennheiser HD650 modifications.
updated 11-02: Foobar tutorial about playing DSD in digital|PC software.
> added 11-01: created a download section with articles/schematics etc.
updated 10-18: Even more measurements on Sennheiser HD650 modifications.
updated 10-15: Foobar 2000 for dummies in digital|PC software.
updated 09-17: added info about square-waves in explanations|how to interpret
graphs
updated 09-17: Information about listening levels in learn|power etc.
> added 09-13: Extensive measurements on Sennheiser HD650 modifications.
> added 09-12: Passive inline filter for some HIFIMAN headphones
> added 08-23: Some ramblings about DR, distortion and SPL in learn|DR
updated 08-13: Olive-Welti target curve in explanations|how to interpret graphs
updated 08-11: Headphone correction filter article
> added 06-29: Info about headphone attenuators for IEM’s and sensitive
headphones.
updated 06-17: information about power supplies in learn|power supplies
updated 05-23: Headphone correction filter manual in schematics|headphone
> added 05-02: Schematics for the ‘SeNNator‘ amplifier in schematics|amplifier
updated 05-07: Kameleon article in schematics|headphone
> added 05-02: Measurements of Sennheiser HD600 and Ultrasone HFI-780
> added 04-23: Schematics for the latest versions of several G1217 amps.
updated 04-19: Philips uptown article (added info about securing the pads)
updated 04-12: Added some info on tubes in amplifiers|hybrid
updated 03-21: Kameleon and filter article in schematics|headphone
> added 03-08: A detailed article about the Superlux HD562 in pdf format.
> added 02-28: Beyerdynamic DT770Pro-250 and DT990Pro-250 in
headphones|measurements
> added 02-27: Grado SR125i measurements in headphones|measurements
> added 02-27: AKG K612 measurements in headphones|measurements
> added 02-18: Superlux HD562 measurements in headphones|measurements
updated 02-07: FiiO and Sansa measurements in Digital|Digital Audio Players
> added 02-06: Schematic of project Solstice in schematics|amplifier
updated 02-04: Added plots from Kameleon amp in schematics|headphone
updated 02-02: Philips SHL9505-GY plots in headphones|measurements
> added 01-28: Info about HD650 pads in headphones|measurements
updated 01-26: Info on rectifiers in learn|power supply/filters
> added 01-21: ARTA setup guide by BMF in learn|articles
> added 01-20: my views on ‘burn-in‘ in learn|burn-in
updated 01-11: the headphones|recommended ones section.
↑
——————– 2015 ————————
——————– 2014 ————————
↓
below: date format MM-DD
updated 12-28: The AKG K518-DJ in headphone|measurements
> added 12-24: Philips Cityscape Uptown SHL9505 in headphones|measurements
updated 12-24: changed the layout of headphones|measurements
> added 12-16: Schematic of a tube buffer circuit in Schematics|Amplifier
> added 11-16: Some info about measurements and disclaimer in
headphones|measurements
> added 11-13: Article about dB: do deciBells ring a bell ? in learn|do
decibells
updated 10-04: Philips A5 Pro with PCU110 velours pads measurements in
headphones|measurements
> added 10-01: Philips A5 Pro measurements in headphones|measurements
updated 09-10: Kameleon article (added Sennheiser Momentum)
> added 09-04: Some extra info about getting a good ‘seal’ of headphones in a
few pages.
> added 08-20: Project Polaris schematic in Schematics|Amplifier
> added 08-14: Measurements of Sansa Clip Sport, Fuze and FiiO X3 in digital|DAP
updated 08-10: Some info added in schematics|amplifier section
updated 08-09: headphone power table
> added 07-13: AKG K181 / K400 / K500 & Beyerdynamic DT250-250 in
headphones|measurements
> added 07-09: Superlux HD-685 evaluation and modifications in
Schematics|Headphone
> added 07-05: DIY Woodies made by ‘Stratocaster’ in headphones|measurements
> added 06-25: Philips SHP-9500 and Superlux HD685 in headphones|measurements
> added 06-13: Philips Fidelio X1 in headphones|measurements
updated 06-11: Beyerdynamic DT1350-SL pad measurements in
headphones|measurements
> added 05-29: Audio Technica ATH-M40X modifications in headphones|measurements
> added 05-27: Audio Technica ATH-M40X in headphones|measurements
updated 05-22: Headphone correction filter article in Schematics|Headphone
updated 05-19: headphones|recommended ones page.
updated 05-14: added headphone(s) to the Kameleon article in
schematics|amplifier.
updated 05-14: Kameleon article and headphone power table
> added 04-28: Kameleon portable headphone amplifier article in
schematics|amplifier
> added 04-19: Some information about regulators in Explanations|power supplies.
updated 04-09: Tascam TH-02 mods in headphones|measurements
> added 03-19: An section about efficiency in Explanations|power, impedance.
updated 03-18: The Explanations|how to interpret graphs section with Olive-Welti
curve.
> added 03-17: Beyerdynamic T90 passive highs/peak filter in
schematics|headphone.
> added 03-16: How LOUD we listen, what power we need for it ?
Explanations|power, impedance.
updated 02-17: Beyerdynamic T50P/DT1350 pad measurements in
headphones|measurements
> added 02-10: added Sunrise-III and Horizon-III in schematics|amplifier
updated 02-02: updated version of the impedance/resistance article in
learn|power, impedance .
> added 01-26: Tascam TH02 and AKG K550 measurements in headphones|measurements.
updated 01-24: Foobar for dummies tutorial.
updated 01-19: Koss KSC75 measurements with Kramer mod in
headphones|measurements .
> added 01-18: Yello album reviews in music|album reviews section.
> added 01-15: Koss PortaPro measurements in the headphones|measurements
section.
> added 01-12: Some information on the snubbering of diodes in rectifiers.
updated 01-03: the headphones|recommended ones section.
↑
——————– 2014 ————————
——————– 2013 ————————
↓
below: date format MM-DD
updated 12-22: Changed the layout of the headphones|measurements section.
updated 12-17: How much power do you need ? answers in: learn|power, impedance.
> added 12-11: How much power do you need ? answers in: learn|power, impedance.
> added 12-08: AKG K551 modification article in the schematics|headphone
section.
> added 12-05: AKG K551 and Beyerdynamic T50P measurements in
headphones|measurements
updated 11-24: Superlux HD681-EVO article in the schematics|headphone section.
> added 11-14: Superlux HD681 replacement pad measurements in
schematics|headphone
updated 11-06: Added some headphones to the filter PCB article.
updated 10-30: Some headphone cable measurements in the cable section.
> added 10-23: Teufel Aureol® Real in the headphones|measurements section.
updated 09-25: Superlux HD681-EVO newer version in the schematics|headphone
section.
> added 09-18: SFI drivers DIY headphone in the headphones|measurements section.
> added 09-07: Superlux HD681-EVO modifications in the schematics|headphone
section.
updated 08-30: Power amp adapter circuit added.
updated 08-25: Power supply article with additional info to repair SMPS
> added 08-21: Superlux HD681-EVO in the headphones|measurements section.
updated 08-15: Power supply article with additional info on mains transformers
updated 08-12: Power supply article with additional info on mains filters
> added 07-17: Plots of DT990-600 and KSC75 in headphones|measurements
> added 07-15: Some information about mains filters in the power supplies
section
updated 07-14: changed the site navigation slightly.
updated 07-12: Jays V-Jays in the headphones|measurements section.
> added 07-11: Silverscrest KH-2347 plots in the headphones|measurements
section.
> added 07-02: HD25-1 / HD 320 / HD215, Philips SHP-9000 in
headphones|measurements
> added 06-27: Sony MDR-XB500 plots in the headphones|measurements section
updated 06-30: Power supply article with additional drawings and info
> added 06-25: Vintage Stax SR-5 with SRD-6headphones|measurements
updated 06-23: Headphones section and added some pictures
> added 06-18: Information about amplifiers and how they work
updated 06-09: HD681 plots in the headphones|measurements section
> added 06-08: Simple rechargeable battery monitoring circuit schematic
> added 06-02: Review of Handel’s Messiah
> added 05-31: Review of Deep Purple’s album ‘Now What‘
> added 05-26: Anecdotal about a cable swap
> added 05-25: a link to an incredible amount of audio related online
calculators and explanations
> added 05-23:Some information on different headphone driver types.
> added 05-18: Technical info about Project Starlight & Ember
> added 05-15: the HD681 revisited a new article about the filter and more
background info
updated 05-12: the Headphone Correction Filter manual
> added 05-11: review of the band TinyFish in Rock/Pop reviews
> added 05-07: Review of Sennheiser RS160 – wireless headphones by Jeff.
> added 05-07: schematics of 2 new hybrid amplifiers.
> added 05-07: Some findings about DIY headphone measurement rigs.
updated 05-02: the Headphone Correction Filter manual and T40RP-mkII / T50RP
manuals.
> added 04-28: information about the NEW Headphone Correction Filter circuit.
> added 04-14: review of the O2 headphone amplifier
updated 04-13: The new filter PCB a sneak preview
updated 04-10: Power supply article
> added 04-09: Measurements of a few headphones.
> added 04-05: part of the article on the usage of speaker amplifiers for
driving headphones.
> added 04-03: Page with all headphone reviews on one page.
> added 04-02: headphone reviews
updated 03-31: Power supply article
> added 03-31: article about crossfeed.
> added 03-30: we added a FORUM in addition to the comment replies.
updated 03-29: Rock & Pop album reviews
> added 03-28: Some information about rectifiers in power supplies
> 2013-03-08: Website was created
↑
——————– 2013 ————————
> added 04-30: HIFIMAN HE400i (2020) measurements, evaluation
updated 04-18: Beyerdynamic DT990/250 article
> added 04-16: Beyerdynamic DT 700 PRO X measurements, evaluation and
modification.
updated 04-05: moved the headphone filter page
> added 04-02: Røde NTH-100 measurements and evaluation
> added 03-18: Brainwavz HM5 measurements and evaluation
> added 02-26: AKG K514-mkII measurements and evaluation
> added 02-06: Beyerdynamic DT 240 Pro measurements, evaluation and modification
> added 02-03: Pioneer SE-M5ST measurements and evaluation
> added 02-02: audio-technica ATH-A700X measurements and evaluation
> added 01-24: Beyerdynamic T51i measurements and evaluation
> added 01-23: Sennheiser HD430 measurements and evaluation
updated 01-09: HIFIMAN HE35X article, added modification.
↑
——————– 2022 ————————
——————– 2021 ————————
↓
below: date format MM–DD
updated 12-30: Selling some headphones (within E.U. only, sorry)
> added 12-24: Sony MDR-ZX110 measurements and evaluation
> added 12-18: BRAINZ H10 measurements and evaluation
> added 12-10: HIFIMAN HE400se measurements and evaluation
> added 12-05: Koss KPH30i measurements, evaluation and modification
> added 11-29: Sennheiser PXC550-II measurements and evaluation
> added 11-24: Sony MDR-7509 HD measurements and evaluation
> added 11-11: JBL TUNE 710 BT measurements and evaluation
> added 11-01: Beyerdynamic DT 900 PRO X measurements and evaluation
> added 10-04: Sennheiser HD590 Prestige measurements and evaluation
> added 10-03: Beyerdynamic TYGR 300 R measurements and evaluation
> added 10-02: Devine PRO 4000 measurements, evaluation and modification
> added 09-16: audio-technica ATH-M50X measurements and evaluation
> added 08-23: Sennheiser HD595 (SE) measurements and evaluation
> added 08-22: DAP audio: HP-280 Pro measurements, evaluation and modification
> added 07-25: Sennheiser HD560 Ovation II measurements, evaluation and
modification
> added 07-16: Sennheiser HD414 (original 2kΩ version) measurements
updated 07-09: Measured the new (2021) Sennheiser pads for HD6** series in
article about earpads
> added 05-22: Sennheiser HD570 Symphony measurements and evaluation
updated 05-02: HIFIMAN HE560(v2) measurements
> added 04-18: Shure SRH-440 measurements and evaluation
> added 04-10: Superlux HD330 measurements, evaluation and modification.
updated 04-03: added Sennheiser HD800 replacement pad measurements.
updated 03-25: AKG K702 measurements, added bass port mod measurements
> added 02-22: Behringer BH-470 measurements, evaluation and modification
> added 02-06: Article about earpads
> added 01-23: Superlux HD660Pro (proto) measurements, evaluation and
modifications
> added 01-19: audio-technica ATH-SR9 measurements, evaluation and modifications
updated 01-06: Audeze Sine measurements, evaluation and modifications
↑
——————– 2021 ————————
——————– 2020 ————————
↓
below: date format MM–DD
updated 12-13: Sennheiser HD800S article
> added 12-13: AKG: N60NC (wired) measurements and evaluation
> added 11-16: Sennheiser HD559 measurements, evaluation and modifications.
> added 11-02: Inner|Fidelity measurement collection PDF completed &
alphabetical
updated 10-08: headphone power table
> added 09-24: Sennheiser HD560S measurements and evaluation
updated 08-08: AKG K702 K712 & K7XX measurements .
> added 08-01: AKG K712 measurements and evaluation.
> added 07-26: Beyerdynamic DT 880-600 measurements and evaluation.
> added 06-27: Shure SRH-1440 measurements and evaluation
> added 06-24: Shure SRH-840 measurements and evaluation
updated 06-14: DT880 Black SE and HD800 pages, added new info
> added 06-07: Beyerdynamic DT 880 Black SE measurements, modifications
> added 04-30: AKG K361 measurements and evaluation.
> added 04-19: AKG K371 measurements and evaluation.
> added 03-25: Roland RH-5 measurements and evaluation.
> added 02-03: AKG K702 measurements, evaluation and treble ‘fix’
updated 02-02: measurements added of a ‘veiled’ HD650 (not a myth)
> added 01-22: Shure SRH-1840 measurements and evaluation.
> added 01-19: Shure SRH-1540 measurements and evaluation.
↑
——————– 2020 ————————
——————– 2019 ————————
↓
below: date format MM–DD
> added 11-14: Philips Fidelio X2HR measurements and evaluation.
> added 10-11: audio-technica ATH-MSR7 measurements and evaluation.
> added 10-10: Yamaha HPH-MT220 measurements and evaluation.
> added 09-15: more passive filters
> added 08-30: AKG K812 measurements, evaluation.
updated 08-17: Beyerdynamic DT1770 measurements, evaluation and modification
updated 08-11: Beyerdynamic DT1990 measurements, evaluation and modification
> added 07-13: vintage Sennheiser HD420 SL restoration and evaluation
> added 07-11: Sennheiser HD 4.40 BT measurements and evaluation
> added 06-16: 1MORE Triple Driver Over-Ear measurements and evaluation
updated 06-16: NAD VISO HP50 added passive filter schematic
updated 06-15: measurements of recent Romanian produced HD58X
> added 05-19: Grundig EE1178 (BlueTooth) measurements and evaluation
> added 05-19: Denon AH-GC20 (B.T. / N.C.) measurements and evaluation
> added 05-15: Bose QC35-II (B.T. / N.C.) measurements and evaluation
> added 04-03: HIFIMAN HE35X measurements and evaluation
> added 03-31: AKG K701 measurements and evaluation
> added 03-10: Sony WH-1000X-M3 (B.T. / N.C.) measurements and evaluation
> added 03-09: Sony WH-CH700N (B.T. / N.C.) measurements and evaluation
> added 01-24: HIFIMAN Edition XX measurements, evaluation, modification
> added 01-12: AKG K7XX (Massdrop) measurements and evaluation
updated 01-02: Superlux HD681 measurements
↑
——————– 2019 ————————
——————– 2018 ————————
↓
below: date format MM–DD
updated 12-27: Massdrop HD58X modifications article
> added 12-08: Marshall Major II Bluetooth measurements and evaluation
updated 11-18: Some additional info on Koss KSC75 earphones
> added 10-21: A for sale section where some reviewed gear is up for sale
> added 10-17: Beyerdynamic T51p measurements and evaluation
updated 10-07: Beyerdynamic Custom One Pro with COP–Plus measurements.
> added 09-29: NAD VISO HP50 measurements and evaluation
> added 08-26: Beyerdynamic Custom One Pro measurements, evaluation and
modifications
> added 08-25: Pioneer SE-305 measurements and evaluation
> added 08-19: Campfire Audio Cascade measurements and evaluation
> added 08-18: Audeze LCD-4z measurements and evaluation
> added 08-17: Sennheiser HD820 measurements and evaluation
> added 08-13: Powerbank output keep-alive circuit for powering low current
devices
> added 07-02: MrSpeakers Ether measurements and evaluation
> added 07-01: Superlux HD687 measurements, mods and evaluation
updated 07-01: Sennheiser HD58X Jubilee added some plots
> added 06-27: AKG K92 measurements and evaluation
> added 06-26: Beyerdynamic Amiron Wireless measurements
> added 06-25: Sennheiser HD599 measurements
updated 06-25: Sennheiser HD58X Jubilee measurements and evaluation
> added 06-24: Audeze LCD-2 Classic measurements
> added 06-24: Audeze LCD-MX4 measurements
> added 06-23: Sennheiser HD569 measurements
> added 06-23: HIFIMAN Sundara measurements
> added 06-23: Final D8000 measurements and evaluation
> added 06-21: HIFIMAN Ananda measurements and evaluation
> added 06-08: Mitchell & Johnson JP1 DJ measurements
> added 05-26: Beyerdynamic DT 880 Edition treble modification
updated 05-20: 3rd-party-plots useful links to other measurement sites
updated 04-24: Beyerdynamic DT 880 Edition (250Ω) measurements
updated 04-07: Kameleon filter list.
> added 04-01: Superlux HD671 measurements and evaluation
updated 03-17: Passive filter for Master & Dynamic MH40 added
> added 03-14: Master & Dynamic MH40 measurements
> added 03-12: Beyerdynamic DT 880 Edition (250Ω) measurements
> added 02-17: Superlux HD672 measurements and evaluation
> added 02-10: Takstar PRO 82 monitor measurements and evaluation
updated 01-21: Superlux HD688 production version measurements
↑
——————– 2018 ————————
——————– 2017 ————————
↓
below: date format MM–DD
updated 12-26: pdf with more Sennheiser HD58X measurements and experiments
> added 12-21: Sennheiser HD58X Jubilee (Massdrop) measurements and impressions
> added 11:25: MrSpeakers ÆON Open measurements and impressions
> added 11:23: Focal Clear measurements and impressions
> added 11:02: MrSpeakers ÆON Closed measurements
> added 11:02: MrSpeakers Ether flow (open) measurements
> added 11:02: MrSpeakers Ether C flow (closed) measurements
updated 11:02: Sennheiser HD660S measurements with HD600 comparo.
> added 10-28: HIFIMAN Susvara measurements
> added 10-28: Grado GS2000e measurements
> added 10-28: Audeze LCD-4 measurements
> added 10:26: JBL E40 BT measurements
> added 10:25: Sennheiser HD800S measurements
> added 10:24: Sennheiser HD660S measurements.
updated 10-08: Denon AH-D600 modifications measurements.
updated 09-21: Sennheiser HD250 linear II measurements.
updated 09-19: AKG K501 measurements with some experiments.
> added 09-08: AKG K501 measurements.
> added 09-06: HIFIMAN HE-6 (early 4-screw version) measurements.
> added 08-10: Creative Sound BlasterX H7 Tournament measurements.
> added 07-20: HIFIMAN HE1000 measurements
> added 07-19: HIFIMAN Edition S and Edition X measurements
> added 07-18: HIFIMAN HE400S and HE-560 measurements
updated 07-17: HIFIMAN HE400i measurements
> added 07-16: Beyerdynamic T1 (mk2) and T5P (mk2) measurements
> added 07-16: Beyerdynamic DT 1770 Pro and DT 1990 Pro measurements
> added 07-15: Focal Utopia and Listen measurements
> added 07-14: Focal Elear measurements
> added 07-13: Sennheiser Momentum 2 (over-ear) measurements
> added 07-12: Sennheiser HD250 linear II measurements
> added 07-11: Sennheiser HD630VB measurements
> added 07-10: Sennheiser HD700 measurements
> added 07-10: Sennheiser HD 2.20 measurements
> added 07-09: V-MODA crossfade II wireless measurements
> added 07-08: V-MODA Crossfade M100 measurements
> added 07-08: Final Sonorous III measurements
> added 07-07: Denon AH-D600 measurements
> added 07-07: Audeze Sine measurements
> added 07-05: Audeze LCD-3, LCD-X and LCD-XC measurements
> added 07-05: Meze 99 classics and 99 neo measurements.
> added 07-04: Audeze EL-8 open, EL-8 Titanium and LCD-2
> added 07-03: Beyerdynamic Amiron measurements.
updated 07-01: Foobar Tutorials
updated 06-23: Cables article
> added 06-17: Balanced attenuators in attenuator and power-amp sections.
updated 06-04: Foobar tutorial part 2
> added 06-03: Battery circuit change for Kameleon and Kameleon 2 portable amps.
updated 06-01: supported Kameleon modules list
updated 04-17: more Roland RH-300 measurements.
> added 04-08: Roland RH-300 measurements.
updated 03-18: changed the how to interpret graphs tree-structure
updated 03-12: added info to the how to interpret graphs article
> added 03-08: t.bone HD 990 D headphone in measurements
updated 03-03: supported Kameleon modules list
> added 03-01: Superlux HD687 (prototype) measurements
updated 02-18: Fostex TH-X00 and Fostex T50RP mk3 measurements
> added 02-11: Fostex TH-X00 (Mahogany) in measurements|Fostex
> added 02-07: Fostex T50RP mk3 in measurements|Fostex
> added 02-05: Superlux HD688 (prototype) measurements
> added 01-24: Compressing DSD files with Wavpack 5 tutorial
updated 01-09: Kameleon-2 Desktop and Portable amp build manuals
updated 01-02: Headphone attenuator adapter article
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM–DD
updated 12-31: Foobar tutorials
updated 12-08: ATH-MSR7 turned out to be fake, moved to crap section
> added 11-26: Dedicated Kameleon page
updated 11-16: HiFiman HE-350 measurements
updated 10-29: supported headphone list for Kameleon
updated 10-20: HiFiman HE-350 measurements (2nd HE350 + seal)
> added 10-19: Veclan Monk+ in measurements
> added 10-19: FAKE audio-technica ATH-MSR7 measurements
updated 10-12: Re-arranged the measurements section
> added 10-08: fix for HiFiman HE-350 treble in measurements|HIFIMAN
> added 10-08: HiFiman HE-350 measurements in measurements|HIFIMAN
updated 10-03: Kameleon articles (more filter modules added) in
schematics|headphone
> added 09-17: Sony MDR-100AAP measurements in measurements|Sony
> added 09-15: Pre-production Superlux HD581 in measurements|Superlux
> added 09-12: Sony MDR-1A measurements in measurements|Sony
> added 09-04: In-line Kameleon manual
updated 09-04: Kameleon-2 desktop and portable amp manuals
> added 08-24: My views on ‘neutral sound‘ in learn
> added 08-06: Influence of Fletcher-Munson on listening pleasure in learn
> added 07-28: Taming the treble article in headphones|taming the treble
updated 07-27: How to interpret graphs, added inner|fidelity compensation.
> added 06-19: Philips SHB-9850NC measurements in measurements|Philips
updated 06-01: headphone power table in learn|articles
> added 06-01: Beyerdynamic DT150 measurements in measurements|Beyerdynamic
updated 05-26: Headphone adapter article in learn|Power-amp-adapter
updated 05-21: Superlux HD662-EVO measurements in measurements|Superlux
updated 05-14: info about SMPS vs LPS power supplies in learn|power supply types
>added 05-04: Ausdom ANC7 measurements in measurements|Ausdom
>added 04-15: Schematic G1217 project Ember rev. 2.1 in schematics|amplifier
updated 03-09 AudioQuest NightHawk cable in measurements|AudioQuest
>added 03-03: AudioQuest NightHawk measurements in measurements|AudioQuest
> added 02-23: Kameleon 2 DESKTOP build manual
updated 02-21: Kameleon 2 PORTABLE build manual
> added 01-31: Superlux HD662-EVO measurements in measurements|Superlux
> added 01-28: HiFiMan HE-400i measurements in measurements|HIFIMAN
> added 01-24: Beats Studio Wireless measurements in measurements|Beats
updated 01-24: Ausdom M05 measurements in measurements|Ausdom
> added 01-08: Sennheiser HD700 passive filter in schematics|headphone related
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM-DD
updated 12-24: Some headphone measurements have been updated.
> added 12-24: Bose Quiet Comfort 25 in measurements|Bose
> added 12-19: Bravo Ocean modifications in schematics|amplifiers
> added 12-16: Kameleon-2 article.
updated 12-13: Philips cityscape uptown in measurements|Philips
updated 12-02: Superlux HD681 and HD681-EVO in measurements|Superlux
> added 12-02: Superlux HD572-SP measurements in measurements|Superlux
> added 11-19: Passive filters for some Hifiman models in schematics|headphone
> added 11-18: Sennheiser HD800 measurements in measurements|Sennheiser
> added 11-13: Foobar tutorial part 3 SACD plugin in digital|software
updated 11-12: Yet some more measurements in Sennheiser HD650 modifications.
updated 11-02: Foobar tutorial about playing DSD in digital|PC software.
> added 11-01: created a download section with articles/schematics etc.
updated 10-18: Even more measurements on Sennheiser HD650 modifications.
updated 10-15: Foobar 2000 for dummies in digital|PC software.
updated 09-17: added info about square-waves in explanations|how to interpret
graphs
updated 09-17: Information about listening levels in learn|power etc.
> added 09-13: Extensive measurements on Sennheiser HD650 modifications.
> added 09-12: Passive inline filter for some HIFIMAN headphones
> added 08-23: Some ramblings about DR, distortion and SPL in learn|DR
updated 08-13: Olive-Welti target curve in explanations|how to interpret graphs
updated 08-11: Headphone correction filter article
> added 06-29: Info about headphone attenuators for IEM’s and sensitive
headphones.
updated 06-17: information about power supplies in learn|power supplies
updated 05-23: Headphone correction filter manual in schematics|headphone
> added 05-02: Schematics for the ‘SeNNator‘ amplifier in schematics|amplifier
updated 05-07: Kameleon article in schematics|headphone
> added 05-02: Measurements of Sennheiser HD600 and Ultrasone HFI-780
> added 04-23: Schematics for the latest versions of several G1217 amps.
updated 04-19: Philips uptown article (added info about securing the pads)
updated 04-12: Added some info on tubes in amplifiers|hybrid
updated 03-21: Kameleon and filter article in schematics|headphone
> added 03-08: A detailed article about the Superlux HD562 in pdf format.
> added 02-28: Beyerdynamic DT770Pro-250 and DT990Pro-250 in
headphones|measurements
> added 02-27: Grado SR125i measurements in headphones|measurements
> added 02-27: AKG K612 measurements in headphones|measurements
> added 02-18: Superlux HD562 measurements in headphones|measurements
updated 02-07: FiiO and Sansa measurements in Digital|Digital Audio Players
> added 02-06: Schematic of project Solstice in schematics|amplifier
updated 02-04: Added plots from Kameleon amp in schematics|headphone
updated 02-02: Philips SHL9505-GY plots in headphones|measurements
> added 01-28: Info about HD650 pads in headphones|measurements
updated 01-26: Info on rectifiers in learn|power supply/filters
> added 01-21: ARTA setup guide by BMF in learn|articles
> added 01-20: my views on ‘burn-in‘ in learn|burn-in
updated 01-11: the headphones|recommended ones section.
↑
——————– 2015 ————————
——————– 2014 ————————
↓
below: date format MM-DD
updated 12-28: The AKG K518-DJ in headphone|measurements
> added 12-24: Philips Cityscape Uptown SHL9505 in headphones|measurements
updated 12-24: changed the layout of headphones|measurements
> added 12-16: Schematic of a tube buffer circuit in Schematics|Amplifier
> added 11-16: Some info about measurements and disclaimer in
headphones|measurements
> added 11-13: Article about dB: do deciBells ring a bell ? in learn|do
decibells
updated 10-04: Philips A5 Pro with PCU110 velours pads measurements in
headphones|measurements
> added 10-01: Philips A5 Pro measurements in headphones|measurements
updated 09-10: Kameleon article (added Sennheiser Momentum)
> added 09-04: Some extra info about getting a good ‘seal’ of headphones in a
few pages.
> added 08-20: Project Polaris schematic in Schematics|Amplifier
> added 08-14: Measurements of Sansa Clip Sport, Fuze and FiiO X3 in digital|DAP
updated 08-10: Some info added in schematics|amplifier section
updated 08-09: headphone power table
> added 07-13: AKG K181 / K400 / K500 & Beyerdynamic DT250-250 in
headphones|measurements
> added 07-09: Superlux HD-685 evaluation and modifications in
Schematics|Headphone
> added 07-05: DIY Woodies made by ‘Stratocaster’ in headphones|measurements
> added 06-25: Philips SHP-9500 and Superlux HD685 in headphones|measurements
> added 06-13: Philips Fidelio X1 in headphones|measurements
updated 06-11: Beyerdynamic DT1350-SL pad measurements in
headphones|measurements
> added 05-29: Audio Technica ATH-M40X modifications in headphones|measurements
> added 05-27: Audio Technica ATH-M40X in headphones|measurements
updated 05-22: Headphone correction filter article in Schematics|Headphone
updated 05-19: headphones|recommended ones page.
updated 05-14: added headphone(s) to the Kameleon article in
schematics|amplifier.
updated 05-14: Kameleon article and headphone power table
> added 04-28: Kameleon portable headphone amplifier article in
schematics|amplifier
> added 04-19: Some information about regulators in Explanations|power supplies.
updated 04-09: Tascam TH-02 mods in headphones|measurements
> added 03-19: An section about efficiency in Explanations|power, impedance.
updated 03-18: The Explanations|how to interpret graphs section with Olive-Welti
curve.
> added 03-17: Beyerdynamic T90 passive highs/peak filter in
schematics|headphone.
> added 03-16: How LOUD we listen, what power we need for it ?
Explanations|power, impedance.
updated 02-17: Beyerdynamic T50P/DT1350 pad measurements in
headphones|measurements
> added 02-10: added Sunrise-III and Horizon-III in schematics|amplifier
updated 02-02: updated version of the impedance/resistance article in
learn|power, impedance .
> added 01-26: Tascam TH02 and AKG K550 measurements in headphones|measurements.
updated 01-24: Foobar for dummies tutorial.
updated 01-19: Koss KSC75 measurements with Kramer mod in
headphones|measurements .
> added 01-18: Yello album reviews in music|album reviews section.
> added 01-15: Koss PortaPro measurements in the headphones|measurements
section.
> added 01-12: Some information on the snubbering of diodes in rectifiers.
updated 01-03: the headphones|recommended ones section.
↑
——————– 2014 ————————
——————– 2013 ————————
↓
below: date format MM-DD
updated 12-22: Changed the layout of the headphones|measurements section.
updated 12-17: How much power do you need ? answers in: learn|power, impedance.
> added 12-11: How much power do you need ? answers in: learn|power, impedance.
> added 12-08: AKG K551 modification article in the schematics|headphone
section.
> added 12-05: AKG K551 and Beyerdynamic T50P measurements in
headphones|measurements
updated 11-24: Superlux HD681-EVO article in the schematics|headphone section.
> added 11-14: Superlux HD681 replacement pad measurements in
schematics|headphone
updated 11-06: Added some headphones to the filter PCB article.
updated 10-30: Some headphone cable measurements in the cable section.
> added 10-23: Teufel Aureol® Real in the headphones|measurements section.
updated 09-25: Superlux HD681-EVO newer version in the schematics|headphone
section.
> added 09-18: SFI drivers DIY headphone in the headphones|measurements section.
> added 09-07: Superlux HD681-EVO modifications in the schematics|headphone
section.
updated 08-30: Power amp adapter circuit added.
updated 08-25: Power supply article with additional info to repair SMPS
> added 08-21: Superlux HD681-EVO in the headphones|measurements section.
updated 08-15: Power supply article with additional info on mains transformers
updated 08-12: Power supply article with additional info on mains filters
> added 07-17: Plots of DT990-600 and KSC75 in headphones|measurements
> added 07-15: Some information about mains filters in the power supplies
section
updated 07-14: changed the site navigation slightly.
updated 07-12: Jays V-Jays in the headphones|measurements section.
> added 07-11: Silverscrest KH-2347 plots in the headphones|measurements
section.
> added 07-02: HD25-1 / HD 320 / HD215, Philips SHP-9000 in
headphones|measurements
> added 06-27: Sony MDR-XB500 plots in the headphones|measurements section
updated 06-30: Power supply article with additional drawings and info
> added 06-25: Vintage Stax SR-5 with SRD-6headphones|measurements
updated 06-23: Headphones section and added some pictures
> added 06-18: Information about amplifiers and how they work
updated 06-09: HD681 plots in the headphones|measurements section
> added 06-08: Simple rechargeable battery monitoring circuit schematic
> added 06-02: Review of Handel’s Messiah
> added 05-31: Review of Deep Purple’s album ‘Now What‘
> added 05-26: Anecdotal about a cable swap
> added 05-25: a link to an incredible amount of audio related online
calculators and explanations
> added 05-23:Some information on different headphone driver types.
> added 05-18: Technical info about Project Starlight & Ember
> added 05-15: the HD681 revisited a new article about the filter and more
background info
updated 05-12: the Headphone Correction Filter manual
> added 05-11: review of the band TinyFish in Rock/Pop reviews
> added 05-07: Review of Sennheiser RS160 – wireless headphones by Jeff.
> added 05-07: schematics of 2 new hybrid amplifiers.
> added 05-07: Some findings about DIY headphone measurement rigs.
updated 05-02: the Headphone Correction Filter manual and T40RP-mkII / T50RP
manuals.
> added 04-28: information about the NEW Headphone Correction Filter circuit.
> added 04-14: review of the O2 headphone amplifier
updated 04-13: The new filter PCB a sneak preview
updated 04-10: Power supply article
> added 04-09: Measurements of a few headphones.
> added 04-05: part of the article on the usage of speaker amplifiers for
driving headphones.
> added 04-03: Page with all headphone reviews on one page.
> added 04-02: headphone reviews
updated 03-31: Power supply article
> added 03-31: article about crossfeed.
> added 03-30: we added a FORUM in addition to the comment replies.
updated 03-29: Rock & Pop album reviews
> added 03-28: Some information about rectifiers in power supplies
> 2013-03-08: Website was created
↑
——————– 2013 ————————
> added 10-24: audio-technica ATH-AD700X measurements, evaluation and
modification
updated 10-17: Fixed some broken links
> added 10-15: Creative Auvana Live! 2 measurements, evaluation and
modifications
updated 09-19: Beyerdynamic DT250-250 article (L-R imbalance)
> added 09-18: Sennheiser HD 520 measurements, evaluation and pads
> added 09-17: Sennheiser HD 400S measurements, evaluation and modification
> added 09-15: Denon AH-MM200 measurements and evaluation
> added 09-01: HIFIMAN Sundara (2021) measurements and evaluation
> added 07-17: Status Audio: CB-1 measurements and evaluation
updated 07-09: OLLO Audio S4X (1.1) Reference article (filtering)
> added 07-07: Philips SHP9600 measurements and evaluation
> added 05-21: Mackie MC-150 measurements, evaluation and modifications
> added 05-15: OLLO Audio S4X (1.1) Reference measurements and evaluation
> added 05-14: OLLO Audio S4R (1.1) measurements and evaluation
> added 05-01: AKG K240 studio measurements and evaluation
> added 04-30: HIFIMAN HE400i (2020) measurements and evaluation
updated 04-18: Beyerdynamic DT990/250 article
> added 04-16: Beyerdynamic DT 700 PRO X measurements, evaluation and
modification.
updated 04-05: moved the headphone filter page
> added 04-02: Røde NTH-100 measurements and evaluation
> added 03-18: Brainwavz HM5 measurements and evaluation
> added 02-26: AKG K514-mkII measurements and evaluation
> added 02-06: Beyerdynamic DT 240 Pro measurements, evaluation and modification
> added 02-03: Pioneer SE-M5ST measurements and evaluation
> added 02-02: audio-technica ATH-A700X measurements and evaluation
> added 01-24: Beyerdynamic T51i measurements and evaluation
> added 01-23: Sennheiser HD430 measurements and evaluation
updated 01-09: HIFIMAN HE35X article, added modification.
↑
——————– 2022 ————————
——————– 2021 ————————
↓
below: date format MM–DD
updated 12-30: Selling some headphones (within E.U. only, sorry)
> added 12-24: Sony MDR-ZX110 measurements and evaluation
> added 12-18: BRAINZ H10 measurements and evaluation
> added 12-10: HIFIMAN HE400se measurements and evaluation
> added 12-05: Koss KPH30i measurements, evaluation and modification
> added 11-29: Sennheiser PXC550-II measurements and evaluation
> added 11-24: Sony MDR-7509 HD measurements and evaluation
> added 11-11: JBL TUNE 710 BT measurements and evaluation
> added 11-01: Beyerdynamic DT 900 PRO X measurements and evaluation
> added 10-04: Sennheiser HD590 Prestige measurements and evaluation
> added 10-03: Beyerdynamic TYGR 300 R measurements and evaluation
> added 10-02: Devine PRO 4000 measurements, evaluation and modification
> added 09-16: audio-technica ATH-M50X measurements and evaluation
> added 08-23: Sennheiser HD595 (SE) measurements and evaluation
> added 08-22: DAP audio: HP-280 Pro measurements, evaluation and modification
> added 07-25: Sennheiser HD560 Ovation II measurements, evaluation and
modification
> added 07-16: Sennheiser HD414 (original 2kΩ version) measurements
updated 07-09: Measured the new (2021) Sennheiser pads for HD6** series in
article about earpads
> added 05-22: Sennheiser HD570 Symphony measurements and evaluation
updated 05-02: HIFIMAN HE560(v2) measurements
> added 04-18: Shure SRH-440 measurements and evaluation
> added 04-10: Superlux HD330 measurements, evaluation and modification.
updated 04-03: added Sennheiser HD800 replacement pad measurements.
updated 03-25: AKG K702 measurements, added bass port mod measurements
> added 02-22: Behringer BH-470 measurements, evaluation and modification
> added 02-06: Article about earpads
> added 01-23: Superlux HD660Pro (proto) measurements, evaluation and
modifications
> added 01-19: audio-technica ATH-SR9 measurements, evaluation and modifications
updated 01-06: Audeze Sine measurements, evaluation and modifications
↑
——————– 2021 ————————
——————– 2020 ————————
↓
below: date format MM–DD
updated 12-13: Sennheiser HD800S article
> added 12-13: AKG: N60NC (wired) measurements and evaluation
> added 11-16: Sennheiser HD559 measurements, evaluation and modifications.
> added 11-02: Inner|Fidelity measurement collection PDF completed &
alphabetical
updated 10-08: headphone power table
> added 09-24: Sennheiser HD560S measurements and evaluation
updated 08-08: AKG K702 K712 & K7XX measurements .
> added 08-01: AKG K712 measurements and evaluation.
> added 07-26: Beyerdynamic DT 880-600 measurements and evaluation.
> added 06-27: Shure SRH-1440 measurements and evaluation
> added 06-24: Shure SRH-840 measurements and evaluation
updated 06-14: DT880 Black SE and HD800 pages, added new info
> added 06-07: Beyerdynamic DT 880 Black SE measurements, modifications
> added 04-30: AKG K361 measurements and evaluation.
> added 04-19: AKG K371 measurements and evaluation.
> added 03-25: Roland RH-5 measurements and evaluation.
> added 02-03: AKG K702 measurements, evaluation and treble ‘fix’
updated 02-02: measurements added of a ‘veiled’ HD650 (not a myth)
> added 01-22: Shure SRH-1840 measurements and evaluation.
> added 01-19: Shure SRH-1540 measurements and evaluation.
↑
——————– 2020 ————————
——————– 2019 ————————
↓
below: date format MM–DD
> added 11-14: Philips Fidelio X2HR measurements and evaluation.
> added 10-11: audio-technica ATH-MSR7 measurements and evaluation.
> added 10-10: Yamaha HPH-MT220 measurements and evaluation.
> added 09-15: more passive filters
> added 08-30: AKG K812 measurements, evaluation.
updated 08-17: Beyerdynamic DT1770 measurements, evaluation and modification
updated 08-11: Beyerdynamic DT1990 measurements, evaluation and modification
> added 07-13: vintage Sennheiser HD420 SL restoration and evaluation
> added 07-11: Sennheiser HD 4.40 BT measurements and evaluation
> added 06-16: 1MORE Triple Driver Over-Ear measurements and evaluation
updated 06-16: NAD VISO HP50 added passive filter schematic
updated 06-15: measurements of recent Romanian produced HD58X
> added 05-19: Grundig EE1178 (BlueTooth) measurements and evaluation
> added 05-19: Denon AH-GC20 (B.T. / N.C.) measurements and evaluation
> added 05-15: Bose QC35-II (B.T. / N.C.) measurements and evaluation
> added 04-03: HIFIMAN HE35X measurements and evaluation
> added 03-31: AKG K701 measurements and evaluation
> added 03-10: Sony WH-1000X-M3 (B.T. / N.C.) measurements and evaluation
> added 03-09: Sony WH-CH700N (B.T. / N.C.) measurements and evaluation
> added 01-24: HIFIMAN Edition XX measurements, evaluation, modification
> added 01-12: AKG K7XX (Massdrop) measurements and evaluation
updated 01-02: Superlux HD681 measurements
↑
——————– 2019 ————————
——————– 2018 ————————
↓
below: date format MM–DD
updated 12-27: Massdrop HD58X modifications article
> added 12-08: Marshall Major II Bluetooth measurements and evaluation
updated 11-18: Some additional info on Koss KSC75 earphones
> added 10-21: A for sale section where some reviewed gear is up for sale
> added 10-17: Beyerdynamic T51p measurements and evaluation
updated 10-07: Beyerdynamic Custom One Pro with COP–Plus measurements.
> added 09-29: NAD VISO HP50 measurements and evaluation
> added 08-26: Beyerdynamic Custom One Pro measurements, evaluation and
modifications
> added 08-25: Pioneer SE-305 measurements and evaluation
> added 08-19: Campfire Audio Cascade measurements and evaluation
> added 08-18: Audeze LCD-4z measurements and evaluation
> added 08-17: Sennheiser HD820 measurements and evaluation
> added 08-13: Powerbank output keep-alive circuit for powering low current
devices
> added 07-02: MrSpeakers Ether measurements and evaluation
> added 07-01: Superlux HD687 measurements, mods and evaluation
updated 07-01: Sennheiser HD58X Jubilee added some plots
> added 06-27: AKG K92 measurements and evaluation
> added 06-26: Beyerdynamic Amiron Wireless measurements
> added 06-25: Sennheiser HD599 measurements
updated 06-25: Sennheiser HD58X Jubilee measurements and evaluation
> added 06-24: Audeze LCD-2 Classic measurements
> added 06-24: Audeze LCD-MX4 measurements
> added 06-23: Sennheiser HD569 measurements
> added 06-23: HIFIMAN Sundara measurements
> added 06-23: Final D8000 measurements and evaluation
> added 06-21: HIFIMAN Ananda measurements and evaluation
> added 06-08: Mitchell & Johnson JP1 DJ measurements
> added 05-26: Beyerdynamic DT 880 Edition treble modification
updated 05-20: 3rd-party-plots useful links to other measurement sites
updated 04-24: Beyerdynamic DT 880 Edition (250Ω) measurements
updated 04-07: Kameleon filter list.
> added 04-01: Superlux HD671 measurements and evaluation
updated 03-17: Passive filter for Master & Dynamic MH40 added
> added 03-14: Master & Dynamic MH40 measurements
> added 03-12: Beyerdynamic DT 880 Edition (250Ω) measurements
> added 02-17: Superlux HD672 measurements and evaluation
> added 02-10: Takstar PRO 82 monitor measurements and evaluation
updated 01-21: Superlux HD688 production version measurements
↑
——————– 2018 ————————
——————– 2017 ————————
↓
below: date format MM–DD
updated 12-26: pdf with more Sennheiser HD58X measurements and experiments
> added 12-21: Sennheiser HD58X Jubilee (Massdrop) measurements and impressions
> added 11:25: MrSpeakers ÆON Open measurements and impressions
> added 11:23: Focal Clear measurements and impressions
> added 11:02: MrSpeakers ÆON Closed measurements
> added 11:02: MrSpeakers Ether flow (open) measurements
> added 11:02: MrSpeakers Ether C flow (closed) measurements
updated 11:02: Sennheiser HD660S measurements with HD600 comparo.
> added 10-28: HIFIMAN Susvara measurements
> added 10-28: Grado GS2000e measurements
> added 10-28: Audeze LCD-4 measurements
> added 10:26: JBL E40 BT measurements
> added 10:25: Sennheiser HD800S measurements
> added 10:24: Sennheiser HD660S measurements.
updated 10-08: Denon AH-D600 modifications measurements.
updated 09-21: Sennheiser HD250 linear II measurements.
updated 09-19: AKG K501 measurements with some experiments.
> added 09-08: AKG K501 measurements.
> added 09-06: HIFIMAN HE-6 (early 4-screw version) measurements.
> added 08-10: Creative Sound BlasterX H7 Tournament measurements.
> added 07-20: HIFIMAN HE1000 measurements
> added 07-19: HIFIMAN Edition S and Edition X measurements
> added 07-18: HIFIMAN HE400S and HE-560 measurements
updated 07-17: HIFIMAN HE400i measurements
> added 07-16: Beyerdynamic T1 (mk2) and T5P (mk2) measurements
> added 07-16: Beyerdynamic DT 1770 Pro and DT 1990 Pro measurements
> added 07-15: Focal Utopia and Listen measurements
> added 07-14: Focal Elear measurements
> added 07-13: Sennheiser Momentum 2 (over-ear) measurements
> added 07-12: Sennheiser HD250 linear II measurements
> added 07-11: Sennheiser HD630VB measurements
> added 07-10: Sennheiser HD700 measurements
> added 07-10: Sennheiser HD 2.20 measurements
> added 07-09: V-MODA crossfade II wireless measurements
> added 07-08: V-MODA Crossfade M100 measurements
> added 07-08: Final Sonorous III measurements
> added 07-07: Denon AH-D600 measurements
> added 07-07: Audeze Sine measurements
> added 07-05: Audeze LCD-3, LCD-X and LCD-XC measurements
> added 07-05: Meze 99 classics and 99 neo measurements.
> added 07-04: Audeze EL-8 open, EL-8 Titanium and LCD-2
> added 07-03: Beyerdynamic Amiron measurements.
updated 07-01: Foobar Tutorials
updated 06-23: Cables article
> added 06-17: Balanced attenuators in attenuator and power-amp sections.
updated 06-04: Foobar tutorial part 2
> added 06-03: Battery circuit change for Kameleon and Kameleon 2 portable amps.
updated 06-01: supported Kameleon modules list
updated 04-17: more Roland RH-300 measurements.
> added 04-08: Roland RH-300 measurements.
updated 03-18: changed the how to interpret graphs tree-structure
updated 03-12: added info to the how to interpret graphs article
> added 03-08: t.bone HD 990 D headphone in measurements
updated 03-03: supported Kameleon modules list
> added 03-01: Superlux HD687 (prototype) measurements
updated 02-18: Fostex TH-X00 and Fostex T50RP mk3 measurements
> added 02-11: Fostex TH-X00 (Mahogany) in measurements|Fostex
> added 02-07: Fostex T50RP mk3 in measurements|Fostex
> added 02-05: Superlux HD688 (prototype) measurements
> added 01-24: Compressing DSD files with Wavpack 5 tutorial
updated 01-09: Kameleon-2 Desktop and Portable amp build manuals
updated 01-02: Headphone attenuator adapter article
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM–DD
updated 12-31: Foobar tutorials
updated 12-08: ATH-MSR7 turned out to be fake, moved to crap section
> added 11-26: Dedicated Kameleon page
updated 11-16: HiFiman HE-350 measurements
updated 10-29: supported headphone list for Kameleon
updated 10-20: HiFiman HE-350 measurements (2nd HE350 + seal)
> added 10-19: Veclan Monk+ in measurements
> added 10-19: FAKE audio-technica ATH-MSR7 measurements
updated 10-12: Re-arranged the measurements section
> added 10-08: fix for HiFiman HE-350 treble in measurements|HIFIMAN
> added 10-08: HiFiman HE-350 measurements in measurements|HIFIMAN
updated 10-03: Kameleon articles (more filter modules added) in
schematics|headphone
> added 09-17: Sony MDR-100AAP measurements in measurements|Sony
> added 09-15: Pre-production Superlux HD581 in measurements|Superlux
> added 09-12: Sony MDR-1A measurements in measurements|Sony
> added 09-04: In-line Kameleon manual
updated 09-04: Kameleon-2 desktop and portable amp manuals
> added 08-24: My views on ‘neutral sound‘ in learn
> added 08-06: Influence of Fletcher-Munson on listening pleasure in learn
> added 07-28: Taming the treble article in headphones|taming the treble
updated 07-27: How to interpret graphs, added inner|fidelity compensation.
> added 06-19: Philips SHB-9850NC measurements in measurements|Philips
updated 06-01: headphone power table in learn|articles
> added 06-01: Beyerdynamic DT150 measurements in measurements|Beyerdynamic
updated 05-26: Headphone adapter article in learn|Power-amp-adapter
updated 05-21: Superlux HD662-EVO measurements in measurements|Superlux
updated 05-14: info about SMPS vs LPS power supplies in learn|power supply types
>added 05-04: Ausdom ANC7 measurements in measurements|Ausdom
>added 04-15: Schematic G1217 project Ember rev. 2.1 in schematics|amplifier
updated 03-09 AudioQuest NightHawk cable in measurements|AudioQuest
>added 03-03: AudioQuest NightHawk measurements in measurements|AudioQuest
> added 02-23: Kameleon 2 DESKTOP build manual
updated 02-21: Kameleon 2 PORTABLE build manual
> added 01-31: Superlux HD662-EVO measurements in measurements|Superlux
> added 01-28: HiFiMan HE-400i measurements in measurements|HIFIMAN
> added 01-24: Beats Studio Wireless measurements in measurements|Beats
updated 01-24: Ausdom M05 measurements in measurements|Ausdom
> added 01-08: Sennheiser HD700 passive filter in schematics|headphone related
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM-DD
updated 12-24: Some headphone measurements have been updated.
> added 12-24: Bose Quiet Comfort 25 in measurements|Bose
> added 12-19: Bravo Ocean modifications in schematics|amplifiers
> added 12-16: Kameleon-2 article.
updated 12-13: Philips cityscape uptown in measurements|Philips
updated 12-02: Superlux HD681 and HD681-EVO in measurements|Superlux
> added 12-02: Superlux HD572-SP measurements in measurements|Superlux
> added 11-19: Passive filters for some Hifiman models in schematics|headphone
> added 11-18: Sennheiser HD800 measurements in measurements|Sennheiser
> added 11-13: Foobar tutorial part 3 SACD plugin in digital|software
updated 11-12: Yet some more measurements in Sennheiser HD650 modifications.
updated 11-02: Foobar tutorial about playing DSD in digital|PC software.
> added 11-01: created a download section with articles/schematics etc.
updated 10-18: Even more measurements on Sennheiser HD650 modifications.
updated 10-15: Foobar 2000 for dummies in digital|PC software.
updated 09-17: added info about square-waves in explanations|how to interpret
graphs
updated 09-17: Information about listening levels in learn|power etc.
> added 09-13: Extensive measurements on Sennheiser HD650 modifications.
> added 09-12: Passive inline filter for some HIFIMAN headphones
> added 08-23: Some ramblings about DR, distortion and SPL in learn|DR
updated 08-13: Olive-Welti target curve in explanations|how to interpret graphs
updated 08-11: Headphone correction filter article
> added 06-29: Info about headphone attenuators for IEM’s and sensitive
headphones.
updated 06-17: information about power supplies in learn|power supplies
updated 05-23: Headphone correction filter manual in schematics|headphone
> added 05-02: Schematics for the ‘SeNNator‘ amplifier in schematics|amplifier
updated 05-07: Kameleon article in schematics|headphone
> added 05-02: Measurements of Sennheiser HD600 and Ultrasone HFI-780
> added 04-23: Schematics for the latest versions of several G1217 amps.
updated 04-19: Philips uptown article (added info about securing the pads)
updated 04-12: Added some info on tubes in amplifiers|hybrid
updated 03-21: Kameleon and filter article in schematics|headphone
> added 03-08: A detailed article about the Superlux HD562 in pdf format.
> added 02-28: Beyerdynamic DT770Pro-250 and DT990Pro-250 in
headphones|measurements
> added 02-27: Grado SR125i measurements in headphones|measurements
> added 02-27: AKG K612 measurements in headphones|measurements
> added 02-18: Superlux HD562 measurements in headphones|measurements
updated 02-07: FiiO and Sansa measurements in Digital|Digital Audio Players
> added 02-06: Schematic of project Solstice in schematics|amplifier
updated 02-04: Added plots from Kameleon amp in schematics|headphone
updated 02-02: Philips SHL9505-GY plots in headphones|measurements
> added 01-28: Info about HD650 pads in headphones|measurements
updated 01-26: Info on rectifiers in learn|power supply/filters
> added 01-21: ARTA setup guide by BMF in learn|articles
> added 01-20: my views on ‘burn-in‘ in learn|burn-in
updated 01-11: the headphones|recommended ones section.
↑
——————– 2015 ————————
——————– 2014 ————————
↓
below: date format MM-DD
updated 12-28: The AKG K518-DJ in headphone|measurements
> added 12-24: Philips Cityscape Uptown SHL9505 in headphones|measurements
updated 12-24: changed the layout of headphones|measurements
> added 12-16: Schematic of a tube buffer circuit in Schematics|Amplifier
> added 11-16: Some info about measurements and disclaimer in
headphones|measurements
> added 11-13: Article about dB: do deciBells ring a bell ? in learn|do
decibells
updated 10-04: Philips A5 Pro with PCU110 velours pads measurements in
headphones|measurements
> added 10-01: Philips A5 Pro measurements in headphones|measurements
updated 09-10: Kameleon article (added Sennheiser Momentum)
> added 09-04: Some extra info about getting a good ‘seal’ of headphones in a
few pages.
> added 08-20: Project Polaris schematic in Schematics|Amplifier
> added 08-14: Measurements of Sansa Clip Sport, Fuze and FiiO X3 in digital|DAP
updated 08-10: Some info added in schematics|amplifier section
updated 08-09: headphone power table
> added 07-13: AKG K181 / K400 / K500 & Beyerdynamic DT250-250 in
headphones|measurements
> added 07-09: Superlux HD-685 evaluation and modifications in
Schematics|Headphone
> added 07-05: DIY Woodies made by ‘Stratocaster’ in headphones|measurements
> added 06-25: Philips SHP-9500 and Superlux HD685 in headphones|measurements
> added 06-13: Philips Fidelio X1 in headphones|measurements
updated 06-11: Beyerdynamic DT1350-SL pad measurements in
headphones|measurements
> added 05-29: Audio Technica ATH-M40X modifications in headphones|measurements
> added 05-27: Audio Technica ATH-M40X in headphones|measurements
updated 05-22: Headphone correction filter article in Schematics|Headphone
updated 05-19: headphones|recommended ones page.
updated 05-14: added headphone(s) to the Kameleon article in
schematics|amplifier.
updated 05-14: Kameleon article and headphone power table
> added 04-28: Kameleon portable headphone amplifier article in
schematics|amplifier
> added 04-19: Some information about regulators in Explanations|power supplies.
updated 04-09: Tascam TH-02 mods in headphones|measurements
> added 03-19: An section about efficiency in Explanations|power, impedance.
updated 03-18: The Explanations|how to interpret graphs section with Olive-Welti
curve.
> added 03-17: Beyerdynamic T90 passive highs/peak filter in
schematics|headphone.
> added 03-16: How LOUD we listen, what power we need for it ?
Explanations|power, impedance.
updated 02-17: Beyerdynamic T50P/DT1350 pad measurements in
headphones|measurements
> added 02-10: added Sunrise-III and Horizon-III in schematics|amplifier
updated 02-02: updated version of the impedance/resistance article in
learn|power, impedance .
> added 01-26: Tascam TH02 and AKG K550 measurements in headphones|measurements.
updated 01-24: Foobar for dummies tutorial.
updated 01-19: Koss KSC75 measurements with Kramer mod in
headphones|measurements .
> added 01-18: Yello album reviews in music|album reviews section.
> added 01-15: Koss PortaPro measurements in the headphones|measurements
section.
> added 01-12: Some information on the snubbering of diodes in rectifiers.
updated 01-03: the headphones|recommended ones section.
↑
——————– 2014 ————————
——————– 2013 ————————
↓
below: date format MM-DD
updated 12-22: Changed the layout of the headphones|measurements section.
updated 12-17: How much power do you need ? answers in: learn|power, impedance.
> added 12-11: How much power do you need ? answers in: learn|power, impedance.
> added 12-08: AKG K551 modification article in the schematics|headphone
section.
> added 12-05: AKG K551 and Beyerdynamic T50P measurements in
headphones|measurements
updated 11-24: Superlux HD681-EVO article in the schematics|headphone section.
> added 11-14: Superlux HD681 replacement pad measurements in
schematics|headphone
updated 11-06: Added some headphones to the filter PCB article.
updated 10-30: Some headphone cable measurements in the cable section.
> added 10-23: Teufel Aureol® Real in the headphones|measurements section.
updated 09-25: Superlux HD681-EVO newer version in the schematics|headphone
section.
> added 09-18: SFI drivers DIY headphone in the headphones|measurements section.
> added 09-07: Superlux HD681-EVO modifications in the schematics|headphone
section.
updated 08-30: Power amp adapter circuit added.
updated 08-25: Power supply article with additional info to repair SMPS
> added 08-21: Superlux HD681-EVO in the headphones|measurements section.
updated 08-15: Power supply article with additional info on mains transformers
updated 08-12: Power supply article with additional info on mains filters
> added 07-17: Plots of DT990-600 and KSC75 in headphones|measurements
> added 07-15: Some information about mains filters in the power supplies
section
updated 07-14: changed the site navigation slightly.
updated 07-12: Jays V-Jays in the headphones|measurements section.
> added 07-11: Silverscrest KH-2347 plots in the headphones|measurements
section.
> added 07-02: HD25-1 / HD 320 / HD215, Philips SHP-9000 in
headphones|measurements
> added 06-27: Sony MDR-XB500 plots in the headphones|measurements section
updated 06-30: Power supply article with additional drawings and info
> added 06-25: Vintage Stax SR-5 with SRD-6headphones|measurements
updated 06-23: Headphones section and added some pictures
> added 06-18: Information about amplifiers and how they work
updated 06-09: HD681 plots in the headphones|measurements section
> added 06-08: Simple rechargeable battery monitoring circuit schematic
> added 06-02: Review of Handel’s Messiah
> added 05-31: Review of Deep Purple’s album ‘Now What‘
> added 05-26: Anecdotal about a cable swap
> added 05-25: a link to an incredible amount of audio related online
calculators and explanations
> added 05-23:Some information on different headphone driver types.
> added 05-18: Technical info about Project Starlight & Ember
> added 05-15: the HD681 revisited a new article about the filter and more
background info
updated 05-12: the Headphone Correction Filter manual
> added 05-11: review of the band TinyFish in Rock/Pop reviews
> added 05-07: Review of Sennheiser RS160 – wireless headphones by Jeff.
> added 05-07: schematics of 2 new hybrid amplifiers.
> added 05-07: Some findings about DIY headphone measurement rigs.
updated 05-02: the Headphone Correction Filter manual and T40RP-mkII / T50RP
manuals.
> added 04-28: information about the NEW Headphone Correction Filter circuit.
> added 04-14: review of the O2 headphone amplifier
updated 04-13: The new filter PCB a sneak preview
updated 04-10: Power supply article
> added 04-09: Measurements of a few headphones.
> added 04-05: part of the article on the usage of speaker amplifiers for
driving headphones.
> added 04-03: Page with all headphone reviews on one page.
> added 04-02: headphone reviews
updated 03-31: Power supply article
> added 03-31: article about crossfeed.
> added 03-30: we added a FORUM in addition to the comment replies.
updated 03-29: Rock & Pop album reviews
> added 03-28: Some information about rectifiers in power supplies
> 2013-03-08: Website was created
↑
——————– 2013 ————————
> added 04-30: HIFIMAN HE400i (2020) measurements, evaluation
updated 04-18: Beyerdynamic DT990/250 article
> added 04-16: Beyerdynamic DT 700 PRO X measurements, evaluation and
modification.
updated 04-05: moved the headphone filter page
> added 04-02: Røde NTH-100 measurements and evaluation
> added 03-18: Brainwavz HM5 measurements and evaluation
> added 02-26: AKG K514-mkII measurements and evaluation
> added 02-06: Beyerdynamic DT 240 Pro measurements, evaluation and modification
> added 02-03: Pioneer SE-M5ST measurements and evaluation
> added 02-02: audio-technica ATH-A700X measurements and evaluation
> added 01-24: Beyerdynamic T51i measurements and evaluation
> added 01-23: Sennheiser HD430 measurements and evaluation
updated 01-09: HIFIMAN HE35X article, added modification.
↑
——————– 2022 ————————
——————– 2021 ————————
↓
below: date format MM–DD
updated 12-30: Selling some headphones (within E.U. only, sorry)
> added 12-24: Sony MDR-ZX110 measurements and evaluation
> added 12-18: BRAINZ H10 measurements and evaluation
> added 12-10: HIFIMAN HE400se measurements and evaluation
> added 12-05: Koss KPH30i measurements, evaluation and modification
> added 11-29: Sennheiser PXC550-II measurements and evaluation
> added 11-24: Sony MDR-7509 HD measurements and evaluation
> added 11-11: JBL TUNE 710 BT measurements and evaluation
> added 11-01: Beyerdynamic DT 900 PRO X measurements and evaluation
> added 10-04: Sennheiser HD590 Prestige measurements and evaluation
> added 10-03: Beyerdynamic TYGR 300 R measurements and evaluation
> added 10-02: Devine PRO 4000 measurements, evaluation and modification
> added 09-16: audio-technica ATH-M50X measurements and evaluation
> added 08-23: Sennheiser HD595 (SE) measurements and evaluation
> added 08-22: DAP audio: HP-280 Pro measurements, evaluation and modification
> added 07-25: Sennheiser HD560 Ovation II measurements, evaluation and
modification
> added 07-16: Sennheiser HD414 (original 2kΩ version) measurements
updated 07-09: Measured the new (2021) Sennheiser pads for HD6** series in
article about earpads
> added 05-22: Sennheiser HD570 Symphony measurements and evaluation
updated 05-02: HIFIMAN HE560(v2) measurements
> added 04-18: Shure SRH-440 measurements and evaluation
> added 04-10: Superlux HD330 measurements, evaluation and modification.
updated 04-03: added Sennheiser HD800 replacement pad measurements.
updated 03-25: AKG K702 measurements, added bass port mod measurements
> added 02-22: Behringer BH-470 measurements, evaluation and modification
> added 02-06: Article about earpads
> added 01-23: Superlux HD660Pro (proto) measurements, evaluation and
modifications
> added 01-19: audio-technica ATH-SR9 measurements, evaluation and modifications
updated 01-06: Audeze Sine measurements, evaluation and modifications
↑
——————– 2021 ————————
——————– 2020 ————————
↓
below: date format MM–DD
updated 12-13: Sennheiser HD800S article
> added 12-13: AKG: N60NC (wired) measurements and evaluation
> added 11-16: Sennheiser HD559 measurements, evaluation and modifications.
> added 11-02: Inner|Fidelity measurement collection PDF completed &
alphabetical
updated 10-08: headphone power table
> added 09-24: Sennheiser HD560S measurements and evaluation
updated 08-08: AKG K702 K712 & K7XX measurements .
> added 08-01: AKG K712 measurements and evaluation.
> added 07-26: Beyerdynamic DT 880-600 measurements and evaluation.
> added 06-27: Shure SRH-1440 measurements and evaluation
> added 06-24: Shure SRH-840 measurements and evaluation
updated 06-14: DT880 Black SE and HD800 pages, added new info
> added 06-07: Beyerdynamic DT 880 Black SE measurements, modifications
> added 04-30: AKG K361 measurements and evaluation.
> added 04-19: AKG K371 measurements and evaluation.
> added 03-25: Roland RH-5 measurements and evaluation.
> added 02-03: AKG K702 measurements, evaluation and treble ‘fix’
updated 02-02: measurements added of a ‘veiled’ HD650 (not a myth)
> added 01-22: Shure SRH-1840 measurements and evaluation.
> added 01-19: Shure SRH-1540 measurements and evaluation.
↑
——————– 2020 ————————
——————– 2019 ————————
↓
below: date format MM–DD
> added 11-14: Philips Fidelio X2HR measurements and evaluation.
> added 10-11: audio-technica ATH-MSR7 measurements and evaluation.
> added 10-10: Yamaha HPH-MT220 measurements and evaluation.
> added 09-15: more passive filters
> added 08-30: AKG K812 measurements, evaluation.
updated 08-17: Beyerdynamic DT1770 measurements, evaluation and modification
updated 08-11: Beyerdynamic DT1990 measurements, evaluation and modification
> added 07-13: vintage Sennheiser HD420 SL restoration and evaluation
> added 07-11: Sennheiser HD 4.40 BT measurements and evaluation
> added 06-16: 1MORE Triple Driver Over-Ear measurements and evaluation
updated 06-16: NAD VISO HP50 added passive filter schematic
updated 06-15: measurements of recent Romanian produced HD58X
> added 05-19: Grundig EE1178 (BlueTooth) measurements and evaluation
> added 05-19: Denon AH-GC20 (B.T. / N.C.) measurements and evaluation
> added 05-15: Bose QC35-II (B.T. / N.C.) measurements and evaluation
> added 04-03: HIFIMAN HE35X measurements and evaluation
> added 03-31: AKG K701 measurements and evaluation
> added 03-10: Sony WH-1000X-M3 (B.T. / N.C.) measurements and evaluation
> added 03-09: Sony WH-CH700N (B.T. / N.C.) measurements and evaluation
> added 01-24: HIFIMAN Edition XX measurements, evaluation, modification
> added 01-12: AKG K7XX (Massdrop) measurements and evaluation
updated 01-02: Superlux HD681 measurements
↑
——————– 2019 ————————
——————– 2018 ————————
↓
below: date format MM–DD
updated 12-27: Massdrop HD58X modifications article
> added 12-08: Marshall Major II Bluetooth measurements and evaluation
updated 11-18: Some additional info on Koss KSC75 earphones
> added 10-21: A for sale section where some reviewed gear is up for sale
> added 10-17: Beyerdynamic T51p measurements and evaluation
updated 10-07: Beyerdynamic Custom One Pro with COP–Plus measurements.
> added 09-29: NAD VISO HP50 measurements and evaluation
> added 08-26: Beyerdynamic Custom One Pro measurements, evaluation and
modifications
> added 08-25: Pioneer SE-305 measurements and evaluation
> added 08-19: Campfire Audio Cascade measurements and evaluation
> added 08-18: Audeze LCD-4z measurements and evaluation
> added 08-17: Sennheiser HD820 measurements and evaluation
> added 08-13: Powerbank output keep-alive circuit for powering low current
devices
> added 07-02: MrSpeakers Ether measurements and evaluation
> added 07-01: Superlux HD687 measurements, mods and evaluation
updated 07-01: Sennheiser HD58X Jubilee added some plots
> added 06-27: AKG K92 measurements and evaluation
> added 06-26: Beyerdynamic Amiron Wireless measurements
> added 06-25: Sennheiser HD599 measurements
updated 06-25: Sennheiser HD58X Jubilee measurements and evaluation
> added 06-24: Audeze LCD-2 Classic measurements
> added 06-24: Audeze LCD-MX4 measurements
> added 06-23: Sennheiser HD569 measurements
> added 06-23: HIFIMAN Sundara measurements
> added 06-23: Final D8000 measurements and evaluation
> added 06-21: HIFIMAN Ananda measurements and evaluation
> added 06-08: Mitchell & Johnson JP1 DJ measurements
> added 05-26: Beyerdynamic DT 880 Edition treble modification
updated 05-20: 3rd-party-plots useful links to other measurement sites
updated 04-24: Beyerdynamic DT 880 Edition (250Ω) measurements
updated 04-07: Kameleon filter list.
> added 04-01: Superlux HD671 measurements and evaluation
updated 03-17: Passive filter for Master & Dynamic MH40 added
> added 03-14: Master & Dynamic MH40 measurements
> added 03-12: Beyerdynamic DT 880 Edition (250Ω) measurements
> added 02-17: Superlux HD672 measurements and evaluation
> added 02-10: Takstar PRO 82 monitor measurements and evaluation
updated 01-21: Superlux HD688 production version measurements
↑
——————– 2018 ————————
——————– 2017 ————————
↓
below: date format MM–DD
updated 12-26: pdf with more Sennheiser HD58X measurements and experiments
> added 12-21: Sennheiser HD58X Jubilee (Massdrop) measurements and impressions
> added 11:25: MrSpeakers ÆON Open measurements and impressions
> added 11:23: Focal Clear measurements and impressions
> added 11:02: MrSpeakers ÆON Closed measurements
> added 11:02: MrSpeakers Ether flow (open) measurements
> added 11:02: MrSpeakers Ether C flow (closed) measurements
updated 11:02: Sennheiser HD660S measurements with HD600 comparo.
> added 10-28: HIFIMAN Susvara measurements
> added 10-28: Grado GS2000e measurements
> added 10-28: Audeze LCD-4 measurements
> added 10:26: JBL E40 BT measurements
> added 10:25: Sennheiser HD800S measurements
> added 10:24: Sennheiser HD660S measurements.
updated 10-08: Denon AH-D600 modifications measurements.
updated 09-21: Sennheiser HD250 linear II measurements.
updated 09-19: AKG K501 measurements with some experiments.
> added 09-08: AKG K501 measurements.
> added 09-06: HIFIMAN HE-6 (early 4-screw version) measurements.
> added 08-10: Creative Sound BlasterX H7 Tournament measurements.
> added 07-20: HIFIMAN HE1000 measurements
> added 07-19: HIFIMAN Edition S and Edition X measurements
> added 07-18: HIFIMAN HE400S and HE-560 measurements
updated 07-17: HIFIMAN HE400i measurements
> added 07-16: Beyerdynamic T1 (mk2) and T5P (mk2) measurements
> added 07-16: Beyerdynamic DT 1770 Pro and DT 1990 Pro measurements
> added 07-15: Focal Utopia and Listen measurements
> added 07-14: Focal Elear measurements
> added 07-13: Sennheiser Momentum 2 (over-ear) measurements
> added 07-12: Sennheiser HD250 linear II measurements
> added 07-11: Sennheiser HD630VB measurements
> added 07-10: Sennheiser HD700 measurements
> added 07-10: Sennheiser HD 2.20 measurements
> added 07-09: V-MODA crossfade II wireless measurements
> added 07-08: V-MODA Crossfade M100 measurements
> added 07-08: Final Sonorous III measurements
> added 07-07: Denon AH-D600 measurements
> added 07-07: Audeze Sine measurements
> added 07-05: Audeze LCD-3, LCD-X and LCD-XC measurements
> added 07-05: Meze 99 classics and 99 neo measurements.
> added 07-04: Audeze EL-8 open, EL-8 Titanium and LCD-2
> added 07-03: Beyerdynamic Amiron measurements.
updated 07-01: Foobar Tutorials
updated 06-23: Cables article
> added 06-17: Balanced attenuators in attenuator and power-amp sections.
updated 06-04: Foobar tutorial part 2
> added 06-03: Battery circuit change for Kameleon and Kameleon 2 portable amps.
updated 06-01: supported Kameleon modules list
updated 04-17: more Roland RH-300 measurements.
> added 04-08: Roland RH-300 measurements.
updated 03-18: changed the how to interpret graphs tree-structure
updated 03-12: added info to the how to interpret graphs article
> added 03-08: t.bone HD 990 D headphone in measurements
updated 03-03: supported Kameleon modules list
> added 03-01: Superlux HD687 (prototype) measurements
updated 02-18: Fostex TH-X00 and Fostex T50RP mk3 measurements
> added 02-11: Fostex TH-X00 (Mahogany) in measurements|Fostex
> added 02-07: Fostex T50RP mk3 in measurements|Fostex
> added 02-05: Superlux HD688 (prototype) measurements
> added 01-24: Compressing DSD files with Wavpack 5 tutorial
updated 01-09: Kameleon-2 Desktop and Portable amp build manuals
updated 01-02: Headphone attenuator adapter article
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM–DD
updated 12-31: Foobar tutorials
updated 12-08: ATH-MSR7 turned out to be fake, moved to crap section
> added 11-26: Dedicated Kameleon page
updated 11-16: HiFiman HE-350 measurements
updated 10-29: supported headphone list for Kameleon
updated 10-20: HiFiman HE-350 measurements (2nd HE350 + seal)
> added 10-19: Veclan Monk+ in measurements
> added 10-19: FAKE audio-technica ATH-MSR7 measurements
updated 10-12: Re-arranged the measurements section
> added 10-08: fix for HiFiman HE-350 treble in measurements|HIFIMAN
> added 10-08: HiFiman HE-350 measurements in measurements|HIFIMAN
updated 10-03: Kameleon articles (more filter modules added) in
schematics|headphone
> added 09-17: Sony MDR-100AAP measurements in measurements|Sony
> added 09-15: Pre-production Superlux HD581 in measurements|Superlux
> added 09-12: Sony MDR-1A measurements in measurements|Sony
> added 09-04: In-line Kameleon manual
updated 09-04: Kameleon-2 desktop and portable amp manuals
> added 08-24: My views on ‘neutral sound‘ in learn
> added 08-06: Influence of Fletcher-Munson on listening pleasure in learn
> added 07-28: Taming the treble article in headphones|taming the treble
updated 07-27: How to interpret graphs, added inner|fidelity compensation.
> added 06-19: Philips SHB-9850NC measurements in measurements|Philips
updated 06-01: headphone power table in learn|articles
> added 06-01: Beyerdynamic DT150 measurements in measurements|Beyerdynamic
updated 05-26: Headphone adapter article in learn|Power-amp-adapter
updated 05-21: Superlux HD662-EVO measurements in measurements|Superlux
updated 05-14: info about SMPS vs LPS power supplies in learn|power supply types
>added 05-04: Ausdom ANC7 measurements in measurements|Ausdom
>added 04-15: Schematic G1217 project Ember rev. 2.1 in schematics|amplifier
updated 03-09 AudioQuest NightHawk cable in measurements|AudioQuest
>added 03-03: AudioQuest NightHawk measurements in measurements|AudioQuest
> added 02-23: Kameleon 2 DESKTOP build manual
updated 02-21: Kameleon 2 PORTABLE build manual
> added 01-31: Superlux HD662-EVO measurements in measurements|Superlux
> added 01-28: HiFiMan HE-400i measurements in measurements|HIFIMAN
> added 01-24: Beats Studio Wireless measurements in measurements|Beats
updated 01-24: Ausdom M05 measurements in measurements|Ausdom
> added 01-08: Sennheiser HD700 passive filter in schematics|headphone related
↑
——————– 2016 ————————
——————– 2015 ————————
↓
below: date format MM-DD
updated 12-24: Some headphone measurements have been updated.
> added 12-24: Bose Quiet Comfort 25 in measurements|Bose
> added 12-19: Bravo Ocean modifications in schematics|amplifiers
> added 12-16: Kameleon-2 article.
updated 12-13: Philips cityscape uptown in measurements|Philips
updated 12-02: Superlux HD681 and HD681-EVO in measurements|Superlux
> added 12-02: Superlux HD572-SP measurements in measurements|Superlux
> added 11-19: Passive filters for some Hifiman models in schematics|headphone
> added 11-18: Sennheiser HD800 measurements in measurements|Sennheiser
> added 11-13: Foobar tutorial part 3 SACD plugin in digital|software
updated 11-12: Yet some more measurements in Sennheiser HD650 modifications.
updated 11-02: Foobar tutorial about playing DSD in digital|PC software.
> added 11-01: created a download section with articles/schematics etc.
updated 10-18: Even more measurements on Sennheiser HD650 modifications.
updated 10-15: Foobar 2000 for dummies in digital|PC software.
updated 09-17: added info about square-waves in explanations|how to interpret
graphs
updated 09-17: Information about listening levels in learn|power etc.
> added 09-13: Extensive measurements on Sennheiser HD650 modifications.
> added 09-12: Passive inline filter for some HIFIMAN headphones
> added 08-23: Some ramblings about DR, distortion and SPL in learn|DR
updated 08-13: Olive-Welti target curve in explanations|how to interpret graphs
updated 08-11: Headphone correction filter article
> added 06-29: Info about headphone attenuators for IEM’s and sensitive
headphones.
updated 06-17: information about power supplies in learn|power supplies
updated 05-23: Headphone correction filter manual in schematics|headphone
> added 05-02: Schematics for the ‘SeNNator‘ amplifier in schematics|amplifier
updated 05-07: Kameleon article in schematics|headphone
> added 05-02: Measurements of Sennheiser HD600 and Ultrasone HFI-780
> added 04-23: Schematics for the latest versions of several G1217 amps.
updated 04-19: Philips uptown article (added info about securing the pads)
updated 04-12: Added some info on tubes in amplifiers|hybrid
updated 03-21: Kameleon and filter article in schematics|headphone
> added 03-08: A detailed article about the Superlux HD562 in pdf format.
> added 02-28: Beyerdynamic DT770Pro-250 and DT990Pro-250 in
headphones|measurements
> added 02-27: Grado SR125i measurements in headphones|measurements
> added 02-27: AKG K612 measurements in headphones|measurements
> added 02-18: Superlux HD562 measurements in headphones|measurements
updated 02-07: FiiO and Sansa measurements in Digital|Digital Audio Players
> added 02-06: Schematic of project Solstice in schematics|amplifier
updated 02-04: Added plots from Kameleon amp in schematics|headphone
updated 02-02: Philips SHL9505-GY plots in headphones|measurements
> added 01-28: Info about HD650 pads in headphones|measurements
updated 01-26: Info on rectifiers in learn|power supply/filters
> added 01-21: ARTA setup guide by BMF in learn|articles
> added 01-20: my views on ‘burn-in‘ in learn|burn-in
updated 01-11: the headphones|recommended ones section.
↑
——————– 2015 ————————
——————– 2014 ————————
↓
below: date format MM-DD
updated 12-28: The AKG K518-DJ in headphone|measurements
> added 12-24: Philips Cityscape Uptown SHL9505 in headphones|measurements
updated 12-24: changed the layout of headphones|measurements
> added 12-16: Schematic of a tube buffer circuit in Schematics|Amplifier
> added 11-16: Some info about measurements and disclaimer in
headphones|measurements
> added 11-13: Article about dB: do deciBells ring a bell ? in learn|do
decibells
updated 10-04: Philips A5 Pro with PCU110 velours pads measurements in
headphones|measurements
> added 10-01: Philips A5 Pro measurements in headphones|measurements
updated 09-10: Kameleon article (added Sennheiser Momentum)
> added 09-04: Some extra info about getting a good ‘seal’ of headphones in a
few pages.
> added 08-20: Project Polaris schematic in Schematics|Amplifier
> added 08-14: Measurements of Sansa Clip Sport, Fuze and FiiO X3 in digital|DAP
updated 08-10: Some info added in schematics|amplifier section
updated 08-09: headphone power table
> added 07-13: AKG K181 / K400 / K500 & Beyerdynamic DT250-250 in
headphones|measurements
> added 07-09: Superlux HD-685 evaluation and modifications in
Schematics|Headphone
> added 07-05: DIY Woodies made by ‘Stratocaster’ in headphones|measurements
> added 06-25: Philips SHP-9500 and Superlux HD685 in headphones|measurements
> added 06-13: Philips Fidelio X1 in headphones|measurements
updated 06-11: Beyerdynamic DT1350-SL pad measurements in
headphones|measurements
> added 05-29: Audio Technica ATH-M40X modifications in headphones|measurements
> added 05-27: Audio Technica ATH-M40X in headphones|measurements
updated 05-22: Headphone correction filter article in Schematics|Headphone
updated 05-19: headphones|recommended ones page.
updated 05-14: added headphone(s) to the Kameleon article in
schematics|amplifier.
updated 05-14: Kameleon article and headphone power table
> added 04-28: Kameleon portable headphone amplifier article in
schematics|amplifier
> added 04-19: Some information about regulators in Explanations|power supplies.
updated 04-09: Tascam TH-02 mods in headphones|measurements
> added 03-19: An section about efficiency in Explanations|power, impedance.
updated 03-18: The Explanations|how to interpret graphs section with Olive-Welti
curve.
> added 03-17: Beyerdynamic T90 passive highs/peak filter in
schematics|headphone.
> added 03-16: How LOUD we listen, what power we need for it ?
Explanations|power, impedance.
updated 02-17: Beyerdynamic T50P/DT1350 pad measurements in
headphones|measurements
> added 02-10: added Sunrise-III and Horizon-III in schematics|amplifier
updated 02-02: updated version of the impedance/resistance article in
learn|power, impedance .
> added 01-26: Tascam TH02 and AKG K550 measurements in headphones|measurements.
updated 01-24: Foobar for dummies tutorial.
updated 01-19: Koss KSC75 measurements with Kramer mod in
headphones|measurements .
> added 01-18: Yello album reviews in music|album reviews section.
> added 01-15: Koss PortaPro measurements in the headphones|measurements
section.
> added 01-12: Some information on the snubbering of diodes in rectifiers.
updated 01-03: the headphones|recommended ones section.
↑
——————– 2014 ————————
——————– 2013 ————————
↓
below: date format MM-DD
updated 12-22: Changed the layout of the headphones|measurements section.
updated 12-17: How much power do you need ? answers in: learn|power, impedance.
> added 12-11: How much power do you need ? answers in: learn|power, impedance.
> added 12-08: AKG K551 modification article in the schematics|headphone
section.
> added 12-05: AKG K551 and Beyerdynamic T50P measurements in
headphones|measurements
updated 11-24: Superlux HD681-EVO article in the schematics|headphone section.
> added 11-14: Superlux HD681 replacement pad measurements in
schematics|headphone
updated 11-06: Added some headphones to the filter PCB article.
updated 10-30: Some headphone cable measurements in the cable section.
> added 10-23: Teufel Aureol® Real in the headphones|measurements section.
updated 09-25: Superlux HD681-EVO newer version in the schematics|headphone
section.
> added 09-18: SFI drivers DIY headphone in the headphones|measurements section.
> added 09-07: Superlux HD681-EVO modifications in the schematics|headphone
section.
updated 08-30: Power amp adapter circuit added.
updated 08-25: Power supply article with additional info to repair SMPS
> added 08-21: Superlux HD681-EVO in the headphones|measurements section.
updated 08-15: Power supply article with additional info on mains transformers
updated 08-12: Power supply article with additional info on mains filters
> added 07-17: Plots of DT990-600 and KSC75 in headphones|measurements
> added 07-15: Some information about mains filters in the power supplies
section
updated 07-14: changed the site navigation slightly.
updated 07-12: Jays V-Jays in the headphones|measurements section.
> added 07-11: Silverscrest KH-2347 plots in the headphones|measurements
section.
> added 07-02: HD25-1 / HD 320 / HD215, Philips SHP-9000 in
headphones|measurements
> added 06-27: Sony MDR-XB500 plots in the headphones|measurements section
updated 06-30: Power supply article with additional drawings and info
> added 06-25: Vintage Stax SR-5 with SRD-6headphones|measurements
updated 06-23: Headphones section and added some pictures
> added 06-18: Information about amplifiers and how they work
updated 06-09: HD681 plots in the headphones|measurements section
> added 06-08: Simple rechargeable battery monitoring circuit schematic
> added 06-02: Review of Handel’s Messiah
> added 05-31: Review of Deep Purple’s album ‘Now What‘
> added 05-26: Anecdotal about a cable swap
> added 05-25: a link to an incredible amount of audio related online
calculators and explanations
> added 05-23:Some information on different headphone driver types.
> added 05-18: Technical info about Project Starlight & Ember
> added 05-15: the HD681 revisited a new article about the filter and more
background info
updated 05-12: the Headphone Correction Filter manual
> added 05-11: review of the band TinyFish in Rock/Pop reviews
> added 05-07: Review of Sennheiser RS160 – wireless headphones by Jeff.
> added 05-07: schematics of 2 new hybrid amplifiers.
> added 05-07: Some findings about DIY headphone measurement rigs.
updated 05-02: the Headphone Correction Filter manual and T40RP-mkII / T50RP
manuals.
> added 04-28: information about the Headphone Correction Filter circuit.
> added 04-14: review of the O2 headphone amplifier
updated 04-13: The new filter PCB a sneak preview
updated 04-10: Power supply article
> added 04-09: Measurements of a few headphones.
> added 04-05: part of the article on the usage of speaker amplifiers for
driving headphones.
> added 04-03: Page with all headphone reviews on one page.
> added 04-02: headphone reviews
updated 03-31: Power supply article
> added 03-31: article about crossfeed.
> added 03-30: we added a FORUM in addition to the comment replies.
updated 03-29: Rock & Pop album reviews
> added 03-28: Some information about rectifiers in power supplies
> 2013-03-08: Website was created
↑
——————– 2013 ————————
--------------------------------------------------------------------------------
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