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Gdańsk, Poland

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Last Online:

1 hour, 59 minutes ago

Interests (Hobbies, favorite activities, etc.):

IT, high-end audio, sport (sometimes)

What I do for a living:

IT specialist: Software/Integration Architect

Headphone Inventory

Stax Lambda Nova Classic
Stax SR-Gamma Pro (with SRD-X Pro) - pure, great old Stax sound... I think
Stax SR-X MK3
Stax SR-5NB "Gold"
? Stax SR-5NB "Gold"
? Jecklin Float Electrostatic
Stax SR-003 (SR-005A) - dark, not as detailed and spatial as larger brothers
* Stax SR-007 MK1 - too clean, too spatial, too good,... to cold (the best?)
* Koss ESP/950 (with E/90) - darker, but more natural than Stax

Sennheiser Unipolar 2000
* Stax SR-80 (SR-84 set with SRD-4) - fast, detailed, but almost lack of low bass
* Philips N6326 - quite nice electret with a little plastic echo
* Philips N6325 - similar to N6326

electret-dynamic hybrid:
AKG K340 - great, trebles more intensive
> AKG K340 - great, very balanced
? AKG K340 (one electret weaker)
* AKG K340 - great

HiFiMAN HE-6 - way cleaner than HE-500, my one of the best
? Yamaha YH-100 - great
Grundig GDHS 223 - great
Grundig GDHS 223 - great
Fostex T50RP - requires a lot of modding to be worth of using
Fostex T50RP (a spare pair)
Elektronica TDS-5 - natural, nice middle range, clear trebles, quite a lot of bass
Elektronica TDS-5M
B&O U70
B&O U70
RFT HOK 80-2 - inefficient, but nice after a little modding
* HiFiMAN HE-500 - better than most dynamic, but somehow sounds dirty
* Elektronica TDS-5 (modded and better)
* RFT HOK 80-2 (another one)

AKG K240 Sextett 600 ohm - a decent one
AKG K240 Sextett 600 ohm (another one)
AKG K240 Sextett 600 ohm (modded)
AKG K280 Parabolic 75 ohm - with fast bass, and "wall of sound" effect
AKG K290 Surround 4x150 ohm -> 75 ohm - long 6m cable is an issue
AKG K401 [120 ohm] - great middle range
AKG K500 [120 ohm] - too airy
AKG K501 [120 ohm] - great, analytical, hard to make them to sound "musical"
AKG K501 [120 ohm] (another one)
AKG K701 [62 ohm] - long used and great, not sterile, requires perfect source and amp
AKG K701 [62 ohm] - a new spare pair, not so great and very different
Beyerdynamic DT931 250 ohm - waiting for recabling
Beyerdynamic DT831 250 ohm - waiting for recabling
Beyerdynamic DT901 250 ohm - something between DT880 and DT990
Beyerdynamic DT880 600 ohm Silver vintage - a decent one, but likes current driving
Beyerdynamic DT880 600 ohm Gold vintage (modded)
Beyerdynamic DT880 2005 Premium Audiophile 600 ohm - a decent one
Beyerdynamic DT150 250 ohm - a decent one (DT190 with DT100 earpads)
Beyerdynamic D48 [5 ohm]
Beyerdynamic DT990 Pro 250 ohm - too much everything, requires proper source
Beyerdynamic DT770 Pro 600 ohm (waiting for modification) - super in the night
Beyerdynamic DT550 mk II [600 ohm] - quite interesting one (like DT990?)
Beyerdynamic DT550 mk II [600 ohm] (in grey)
Beyerdynamic DT330 mk II [40 ohm] - nice after recabling and with strong amp
Beyerdynamic DT860 [32 ohm] - "V" even more than DT990
Beyerdynamic DT440 [32 ohm] - less refined DT880
Beyerdynamic DT440 [32 ohm] - less refined DT880
Beyerdynamic DT660 [32 ohm] - less refined DT770
Beyerdynamic DT660 [32 ohm] - less refined DT770
Creative Aurvana Live! - (waiting for modification) - stock are boring
Creative Aurvana Live! (for daughter Julia)
Creative Aurvana Live! (for daughter Anna)
Denon AH-D7000 - great
Denon AH-D2000 - one of my favourite for a few kind of music
Jecklin Float Model One [200 ohm] - K1000 like..., almost ;)
Philips SHP9000 (buildinRCA sockets) - balanced and hart to make it alive
> SuperLux HD-660 [150 ohm] (at work) - quite good for 1/4 of the price of DT770
> SuperLux HD-660 [150 ohm] (a spare pair)
Sony MDR-CD3000 - a little specific for me, but great in the night
Sony MDR-CD850 - similar to CD3000, but not as much clean, and too bright
Sony MDR-CD750 - brightness only, modded with CAL! drivers
* Audio Technica ATH-909 [40 ohm] - a nice one
* Audio Technica ATH-909 [40 ohm] (another one)
* AKG K120 600 ohm
* AKG K141 Silver 600 ohm - a nice one
* AKG K141 Golden 600 ohm - a nice one
* AKG K272 HD [55 ohm] - a little specific, quite decent, but too sealed pads
* AKG K550 - similar problematic as K272
* Beyerdynamic T70 [250 ohm] - super sensitive, little metallic, with a small treble peak
* Beyerdynamic DT990 2005 Premium 600 ohm - balanced and refined Pro
* Beyerdynamic DT990 vintage 600 ohm - balanced and refined Pro
* Beyerdynamic DTX900 [32 ohm] - surprising after re-cabling with use of RCA sockets
* Beyerdynamic DT294 250 ohm (DT250 with a mic) - I prefer other from this brand
* Denon AH-D2000 (a gift to my friend)
* Philips SHP9000 (a spare pair)
* Philips SHP9000 (a broken by friend, but repaired by me)
* Philips SHP8900 - lack of middle range, but very dynamic
* Philips SBC HP800 - cheap but good for a price after mounting RCA sockets
* Pioneer SE-M390 - too showy
* Sony MDR-ZX700 - not for an audiophile (too technical), but I liked it
* Studer Revox Synergy [600 ohm] - between DT880 and DT990 (or DT550)
* SuperLux HD-330 [150 ohm] - quite good for 1/4 of the price of DT990
* SuperLux HD-668B - too aggressive, way too bassy with a long cable
ꝉ AKG K140 600 ohm
ꝉ Beyerdynamic DT770 Pro 250 ohm - super in the night - driver just die with no cause!
ꝉ Creative Aurvana Live! - broken headband
ꝉ Sennheiser HD-565 Ovation - completely broken, not durable at all
ꝉ Sennheiser HD-580 Precision - not durable at all - my last Sennheiser!
ꝉ Sennheiser HD-425

Koss PortaPro

* - not longer owned
ꝉ - R.I.P.
> - for sell

Headphone Amp Inventory

Breeze Audio E4 (A-class, symmetrical JFET/MOSFET design) - nice, very natural, but without enough kick, control and air
Breeze Audio E5 (A-class, symmetrical JFET/MOSFET design) - maybe a better space and details, but a little sharp and less natural
Koss E/90 driver/amplifier - good match for ESP/950, but too technical
Koss E/10 driver/energizer
Stax SRM-1 driver/amplifier (modded to Pro) - musical, airy with a lot of space on SR-Gamma Pro
Stax SRM-1 MK2 driver/amplifier
Stax SRM-252A driver/amplifier (in modding) - stock very disappointing
Stax SRD-X Pro driver/amplifier (modded) - design flaws make me mod it to regain the lower bass
Stax SRD-7 Pro driver/energizer
Stax SRD-7/MK2
* Stax SRD-4 driver/adapter
current buffers
mine old DIY devices
few awfully sounded op-amp based amps
* Breeze Audio E3 (Beyerdynamic A1 clone) - thin without heavy modding
* FiiO E5 - bad, bad, bad
* FiiO E7 - bad, bad, bad as an amplifier

* - not longer owned

Source Inventory

Pioneer PD-91 [2xPCM65] - unmodified and great
Akai CD-69 [2xPCM63] - - unmodified mediocre
Sherwood CD-880 [2xAD1862, SM5843] - stock quite good
Denon DCD-1520 [2xPCM64] - unmodified mediocre
Denon DCD-1520 [2xPCM64] - (different version of DCD-1520) modified and better
Denon DCD-1520 [2xPCM64]
Harman Kardon HD740 [2xPCM1702, SM5843] - heavily modified and great
Harman Kardon HD740 [2xPCM1702, SM5843] - another for modding
Harman Kardon HD740 [2xPCM1702, SM5843] - unmodified quite OK (cheap PSU)
Harman Kardon HD7625 [4xPCM61P] - quite auditable
Harman Kardon HD7525 [4xPCM61P] - waiting for modification
Harman Kardon HD7525 [4xPCM61P] - quite auditable (cheap PSU)
Kenwood DP-7020 [2xPCM1701P] - in the middle of modding
Kenwood DP-7020 [2xPCM1701P] - unmodified and quite OK
Denon DVD-5000 [4xPCM1704-J] - awful stock sound, but great potential for modding
> Denon DCD-685 [2xPCM1702P-L] - for playing with the modding
Kenwood DP-1510 [2xPCM56P-L] - for playing with the modding
Kenwood DP-1510 [2xPCM56P-L] - (another one)
Marantz CD583 [TDA1541A] - modded
Philips CD670 [TDA1541] - nice, but without resolution
Philips CD660 [TDA1541] - nice, but without resolution
Philips CD160 [TDA1541] - too sharp
Philips CD150 [2xTDA1540] - nice
Philips CD104 [2xTDA1540] - yes, again!
Eltax Symphony CDP-80 - modded, dynamic, quite natural sound
* Kenwood DP-4020 [PCM1700U] - not bad, modded little better
* Kenwood DP-6020 [2xPCM1701P] - awful stock sound, but high-end when modded to NOS non-op-amp
* Pioneer PD-S503 [PD2029A] - modded to S505++, very detailed
* Meridian 206 - great, but Pioneer PD-91 was better
* Marantz CD 60 [TDA1541] - too sharp, too chaotic and I have no courage to modify (fix the sound) it at that time
* NAD 5440 CD - quite nice, but very weak error correction
* Akai CD-55 - medicore, but way better than Technics
* Denon DCD-660 [2xPCM61P] - heavily modded
* Technics SL-PS50 - every CD sounds the same, the same bad
* 3 x Philips CD104 [2xTDA1540] (I have it three times: first died, second was destroy by me during modification, third was sold) - very solid sound, but way too raw

DIY NOS DAC [AD1865N-K] - great
DIY NOS DAC [4xTDA1543] - decent one, no, great one
Cambridge Audio DACMAGIC 1 [2xTDA1305] - quite decent one
DIY DAC [AD1955] - decent one
DIY DAC [WM8740] - decent one, but too dynamic, too technical
DIY DAC [WM8741] - decent one, but too dynamic
DIY DAC [CS4398] - too cold, but CS4398 can drive 600/250 ohm headphones directly
DIY DAC [AK4395] - too light
DIY DAC [PCM2706 + PCM5100] - too dynamic, too artificial like OPA2134
* DIY DAC [PCM2702] (another) - quite decent, but too raw
* HA Info Coax [PCM2902E] - too large jitter without modding it
* Nostromo USB DAC [PCM2706 + PCM1781] - too analytical, too cold, too light
many other not important sigma-delta DAC's
* FiiO E7 + L7 [PCM2706, WM8740 DAC, AD8692, TPA6130A] - E7 has an awfully sounded headphone output, but L7 is a passive connector skipping volume control and headphone amp in the same way as FiiO E9 do it, which unmodified (OPA2134 should be replaced to OPA2132, OPA2107 or another) is also awfully sounded headphone amp
* Sound Blaster USB [STAC9460, TDA1308] - modded nice, but clumsy
* DIY DAC [PCM2702] - quite decent, but too raw

* - not longer owned

Cable Inventory

Kimber Silver Streak RCA
Kimber Silver Streak XLR
Kimber PBJ RCA
Kimber PBJ RCA
Kimber TC8 (bi-wiring)

Power-Related Components

the power distribution station near the house and modern, fully copper electric installation in the house ;)
oversized electrolytic capacitors in every equipment ;)

Other Audio Equipment

Hafler 9270 [Excelinear JFET/MOSFET]
* mine DIY amplifiers
* JPW Sonata
* Wharfedale (?)
* Infinity (?)
* Hafler 9130
* Aura (50?)
* NAD 320i

* - sold

Audio-Related Tweaks

skipping of amping
removing op-amps from the path

Music Preferences

electronic/psychedelic/progressive/mathematic/acoustic rock, modern celtic, klezmer, modern jazz, classic

I frequently listen to:
Arcturus - 2005. Sideshow Symphonies
Kari Bremnes - 2000. Norwegian Mood
Alanis Morissette - 2005. Jagged Little Pill Acoustic
Jan Garbarek - 1993. Twelve Moons
Zbigniew Namyslowski Quartet - 1992. The Last Concert
Henryk Miskiewicz & Simple Acoustic Trio - 2001. Lyrics
Renaud Garcia-Fons - 2006. Arcoluz
Paul Simon - 1986. Graceland
Paul Simon - 1990. The Rythm of the Sints
Primus - 1993. Pork Soda
Primus - 1999. Antipop
Roger Waters - 1992. Amused to Death
Yello - 1988. Flag
Yello - 1991. Baby
Yello - 2009. Touch Yello
Shpongle - 2009. Ineffable Mysteries from Shpongleland
Ozric Tentacles - 2006. The Floor's Too Far Away
Younger Brother - 2007. The Last Days of Gravity

Interests (non-headphone)

informatics, electronics

Gear-Fi (Favorite Non-Audio Gear & Gadgets)

silent PC clone with GNU/Linux as a desktop
other PC clone with GNU/Linux as a server
Sharp LC-52LE830E TV set
Sony PlayStation 3
few smartphones with Android

borizm's Recent Activity

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AKG K501 love...
borizm posted in this thread in Headphones (full-size) 7/12/15 at 10:07am | 1009 replies | 89172 views
Is Sabre ES9018 the best DAC chip right now?
borizm posted in this thread in Dedicated Source Components 6/12/15 at 3:17am | 102 replies | 88618 views
AKG K550 VS. AKG Q701
borizm posted in this thread in Introductions, Help and Recommendations 4/24/15 at 2:55pm | 18 replies | 13973 views
borizm posted in this thread in Dedicated Source Components 3/4/15 at 2:21pm | 3 replies | 3063 views
AKG K340
borizm posted in this thread in Headphones (full-size) 5/12/13 at 5:39am | 12 replies | 1302 views
How good are JVC HP-DX700/1000 Compared to Denon AH-D5000?
borizm posted in this thread in Headphones (full-size) 3/14/13 at 3:58pm | 8 replies | 1189 views
FiiO E9 Review
borizm posted in this thread in Headphone Amps (full-size) 1/19/13 at 2:05pm | 1322 replies | 207216 views
Modern-day equivalent to K501's?
borizm posted in this thread in Headphones (full-size) 1/17/13 at 2:40am | 20 replies | 1096 views
Big difference between Stax SRM-252s and 323s?
borizm posted in this thread in High-end Audio Forum 1/14/13 at 1:52pm | 1 replies | 2238 views


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