Audio Project Headphone Amp WNA MKII

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My Audio Project - Headphone Amp WNA MKII
Mein Audio Projekt - Kopfhörer Verstärker WNA MK II
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WNA MKII Headphone Amp
White Noise (WNA) had closing its doors to business effective from 30th April 2006! Some links are dead! View topic - White Noise Closing Down
More about WNA MK II please see here: New - old flaggshiff WNA MKII New! WNA MKll Head-amp kit. - Page 1 New! WNA MKll Head-amp kit. - Page 51 ...... Some links are dead! WNA MKll Head-amp kit. - Page 76 - Head-Fi Covering Headphones, Earphones and Portable Audio WNA MKll Head-amp kit. - Head-Fi Covering Headphones, Earphones and Portable Audio WNA MKlll announced! - Head-Fi Covering Headphones, Earphones and Portable Audio Rock Grotto Forum - I miss the WNA discussions! Suggestion ..... rock grotto - WNA MKlll minor glitches.... Rock Grotto White Noise Audio Rock Grotto - Forum View Circle - White Noise Audio Forum
My Current WNA MKII
WNA MKII - schema without any modifications:
This parts I use: C5, C6 Nichicon FG 100 uF, 25V C11, C12 Nichicon KZ 220 uF, 25V C7 Nichicon KZ 220 uF, 50V C4 BlackGate NX 1000 uF 25V C2, C3, C8, C9, C10 Evox Rifa PHE 450 0,1 uF / 250V (follower of PHE 428) R11 (instead of lamp suggested from author) 5 OHM Holco (two 10 OHM Holco H4 parallel) instead of C1 - 1,02 kOHM Holco H4 IC1, IC2 Burson V6 Vivid (now) - and in railsplitter LM6171 R4 = J2 Murata Ferrite bead R1, R2, R3, R5, R6, R12, R13, R14 are Welwyn RC55Y 0.25W 0.1% R7, R8, R9, R10 are Truohm 0.25W 0.1% R12, R13, R14 are 0.6W 1% metal film I1 3.5mA constant current diodes (CRD CurrentSource Semitec) I2, I3, I4 5.6mA constant current diodes (CRD CurrentSource Semitec) Potentiometer ALPS blue velvet 2x50 kOHM log. stereo Currently there is no ZOBEL network, no additional 330 kOHM feedback. Additional modification: Bypass the Evox Rifa PHE 450 100nF (C2, C3) with WIMA FKP2 10nF/63V and the Nichicon FG 100uF (C5, C6) with Evox Rifa PFR 220pF This caps are mouted on rear side:
WNA MKII Railsplitter
(1) David use a thin twisted 3 pol. wire for power connect between rail splitter and each amp - I use the twisted (red/black) wire for +V -V and the green wire for ground (on bottom side of PCB) - and use the twisted (red/black) wire for output (P2 to Jack) on forefront of PCB.
My WNA works now - the first burn in test with my Senn HD 600 headphones - "WOW" its much more better than the headphone output of my Philips CD 650 or of the Yamaha CR 2040 receiver - both are "old HiFi classics". A complete test of hearing follows - with Eva Cassidy "Live At Blues Alley" and some other music all my hairs stand up, I have never heared this so before
(2) Modification: Bypass the Evox Rifa PHE 450 100nF with WIMA FKP2 10nF/63V and the Nichicon FG 100uF with Evox Rifa PFR 220pF
My experience with some other OPA's : LM6171, AD843, OPA602, AD847, LT1056, LT1022,TLE2071, OPA134, OPA604, LME49710, OPA627, Supreme Sound Opamp V5S, AD797, OPA134 New! WNA MKll Head-amp kit. - Page 51 New! WNA MKll Head-amp kit. - Page 76 - Head-Fi Covering Headphones, Earphones and Portable Audio Gain Bandwidth / Slew Rate / Input Stage LT1056 5.5MHz 14V/µs (JFET input) LT1022 8.5MHz 23V/µs (JFET input) TLE2071 10MHz 24V/µs (JFET input) OPA134 8MHz 20V/µs (JFET input) OPA602 6.5MHz 35V/µs (DiFET input) OPA604 20MHz 25V/µs (JFET input) OPA627 16MHz 55V/µs (DiFET input) AD797 8MHz 20V/µs (BJT input) AD847 50 MHz 300V/µs (BJT input) AD845 16 MHz 100V/µs (BiFET input) AD843 34 MHz 250V/µs (CBFET input) LM6171 100MHz 3600V/us (BJT input) LM6181 100MHz 2000V/µs (BJT input) LME49710 55MHz 20V/µs (BJT input) Supreme Sound Opamp V5S 50MHz 36V/µs ... 49V/µs (FET input)
(3) Next step I use three LME49710 in WNA MKII in my modified WNA MKII, instead of AD843 (amp) / LM6171 (railsplitter). First I cannot hear any difference between. First I heared with senn HD 600. I think for exact compare I must use two WNA's so I can change very quick between to hear very small differences Some of CD/SACD's I used: KODO (Japan SONY), Concord Jazz SACD sampler, PF Final Cut, ....
(4) Next step I am going back to AD843 (amp) / LM6171 (railsplitter) It's imagination from me or not - with LME49710 and K 701 I feel the trap is littleness sharper ......... music SACD Ray Brown - Summer Wind - Live At The Loa I test the AD843 in railsplitter - it oscillates
(5) Next step I run two AD847 in my modified WNA MKII (with AKG K701 and Marantz SA 7001 KI) My first experience: More punch More "metal" than "soft" in "brass" Music come to the fore Not for quiet sound level - here is the AD843 "king" My opinion - this statements are subjektiv - objective are only ABX tests with two similar amps but different OPA's and a ABX switcher. But this statement is be true for the most of the DIY test's ..... or? Has anyone test the AD847 (singel) or AD827 (dual) too?
(6) We had ignored Linear Technology http://www.linear.com/ Next step I use two LT1056 in place of the both AD847 There are very little differences .... First test - from the first tick I hear - I am snoopy why after a burning in time Treble (cymbals) are a little bit softer, silkier, darker, more natural Micro Dynamics - more than AD847 - more in background too. 2nd & 3rd test - as far as I can see the LT1056 is a "big player" like AD843 too Natural, detailled sound with good micro dynamics, open wide and deep stage. I think one must be changed: The WNA design use a ferrite bead between the output of the OPA and the powerstage. This is not calculated for other OPA's. The datasheet suggestions of LT1056 use a little cap 10 ... 33 pF in NFB: When the feedback around the op amp is resistive (RF), a pole will be created with RF, the source resistance and capacitance (RS, CS), and the amplifier input capacitance (CIN ≈ 4pF). In low closed-loop gain configurations and with RS and RF in the kilohm range, this pole can create excess phase shift and even oscillation. A small capacitor (CF) in parallel with RF eliminates this problem. With RS (CS + CIN) = RFCF, the effect of the feedback pole is completely removed." But I don't hear oscillation in audible range or distortion. Only very good sound And all this with an "old design" 5.5 MHz, 14V/us OP - silmilar to the OPA602 Speed are not essential

Rock Grotto Forum - AD847 vs AD843 in WNA MKII
But - please give the LT1056/LT1022 a chance - free samples for LT1056/LT1022 are open (2 pcs) - last both days I had some sessions .... The LT1056 sounds warm and cold, sharp and soft, analytic and natural - so as the sound-engineer has done his work Highlights Roger Waters, Amused To Death Deeeep natural bass Pink Floyd, Final Cut Good micro dynamics, very subtle in background (slapping shoes, playing children, ..)
Pete Townshend "Face the face" (in german we said "fetzt so richtig") deep bass "grummel " and brutal drums Sinéad O'Connor "GOSPEL OAK" had rare heard this so natural and realistic I think this are twice effects - one the LT1056 second - my K701 nearly burned in The K701 is one of the best headphones I ever heared!
(7) Yesterday I got samples of LT1022 My first (subjective) look and feel - the LT1056 sounds better - but I will give the LT1022 a chance to burn in maybe, yesterday I had a bad day to hear?!
additional listenings .... LT1022 sometimes a very little bit muted leadsinger a bit more in background, quieter - but background sound a bit louder clear sound emotionally I missing something but I cannot say what LT1056 sometimes tiny strained in treble at sizzle cymbal, LT1022 does not. This statements are subjektiv and emotional ...... I rate LT1056 emotionall prior to LT1022, but very close
(8) Thanks - now the OPA602AP is inside My first short impression without burn in or longer warming up and only one CD "PF FinalCut" ...... nearly perfect - detailled, good micro dynamic .... more later .....
After some sessions I can say (for me) the OPA602AP is one of the distinguished OPA's for the WNA MKII. Very balanced, detailed music Better than LT1056 LT1022 AD847 AD843 LM6171 LME49710? I cant say this with guarantee but the OPA602AP is a new star
Yesterday evening I heared Roger Waters "Amused to Death" - this was a extraordinary epiphany I think its near "the end of the flagpole" with my components - another OPA have a rough ride to overcome the OPA602AP in WNA MKII To make a great shift in sound I must change others, ... the CD/SACD player, the headphones, .......
(9) Now I use two TLE2071 inside my WNA MK II - but no elementary difference between OPA602 and TLE2071. I think they come from the same TI (BB) familie. Compare to the Graham Slee "green Solo" the WNA sound a little bit sharpen - PF Final Cut track 1 - rattle the coins. The "green Solo" rattle the coins more actualise Excalibur low-noise high-speed TLE207x http://focus.ti.com/lit/ds/symlink/tle2071a.pdf BB/TI OPA1632 an interesting Audio OP AMP http://rockgrotto.proboards39.com/index.....read=1192675684
(10) Before I put my WNA MKII into my depot, I changed the OPA's before AD847, then OPA134 and now OPA627 ..... and wow it tops my "green" Solo with OPA LME49720HA instead of the AD823. With OPA627 and Denon AH-D7000 or AKG Q701 the violins shines Max Bruch, Violinkonzerte Nr. 1 & 2, Salavatore Accardo, Gewandhausorchster Leipzig, Kurt Masur, CD Max Bruch, Violinkonzerte Nr. 1 & 3, Tortsen Janicke, Gürzenich Orchester, Markus Stenz, SACD and the BlackGates NX 1000 uF 25V are re-burned in now (the sigle caps in signal path)
(11) Now I test AD797 opamps (biased into class-A as all others in this place). They are different to OPA627 and offers a bit more fine details and less sharpness with AKG K812 Pro (in some music tracks hearable). I had thought about oscillation before without compensation of AD797. But it works well without additional caps. AD797 have a bit of a diva.
(12) Now I test OPA134 opamps (biased into class-A as all others in this place). At first listening I don't hear noticeable differences to AD797. For the subtleties, you would need two completely identical amplifiers, differing only in the operational amplifiers used, and do an ABX comparison. This actually applies to all OPAs. The comparisons that have already been made only represent the subjective feeling. However, differences may still exist. In general, there is a noticeable difference to the headphone amplifier built into the Marantz SACD player SA 7001 KI.
(13) Two Supreme Sound Opamp V5 I used too Supreme Sound Opamp V5 (Supreme Sound Audio) Supreme Sound Opamp V (Burson Audio)
More about coming soon! Is now in the house!
Now my WNA MKII works with Two Supreme Sound Opamp V5 S First pictures and informations from
(14) Two Burson V6 Vivid I use now Burson V6 Vivid and V6 Classic
I listen to these with enthusiasm! More about coming soon! Burson Audio V6 Vivid and V6 Classic fully discrete audio opamp
To WNA MKII schema
The following modifications I discuss in some DYI forums ...... as seen on Walt Jung's Website WTnT_Op_Amp_Audio_2 - Realizing High Performance: Buffers (Part II) WTnT_Op_Amp_Audio_1 WTnT_Op_Amp_Audio_3 WTnT_Op_Amp_Audio_4 WTnT_Practical_Circuits_for_Quiet_Audio_Transmission
Suggested modification hints looks like WNA MKIII (but currently on hold) Replace the two diodes with transistors - MPSA42 / MPSA92 connect the collectors with a pice of wire to +V or to -V (as shown in picture) both resistors in path must be equal - 120 Ohm (Welwyn RC55C 0,25W 0,5%) both current sources must be equal - 3.5 mA ZOBEL network - 10 Ohm in series with a 100 nF cap (WIMA MKS4 0,1 uF 250VDC / Welwyn MFR4 0,25W 1%) a 15 Ohm resisitor in series to the headphone local and over all feedback resistors as described in some threads solder a 3 A reverse diode parallel to the PSU input posts und the PCB - to protect the amp from erroneous reverse polarity solder a Panasonic FC 2200uF 50V cap parallel to the PSU input jack If I have this done I will publish some photos here. Farnell InOne - weltweit führender Distributor von elektronischen, elektrischen und Instandhaltungsprodukten (MRO). Farnell InOne, distributors of electronic, electrical and industrial component products. Online ordering and 24 hour delivery as standard.
Suggested modification schema looks like WNA MKIII:

WNA MKIII - schema without any modifications:

Pictures - please klick on pictures to enlarge


First building - please klick on pictures to enlarge




WNA MKII Headphone Amp Parts - please klick on pictures to enlarge
Parts from RS Components
Parts from RS Components
ALPS blue potentiometer, EVOX RIFA PFR5 caps, WIMA MKS4 caps, Murata Ferrite bead, Case Hammond 1455N1602, (more interesting parts... Welwyn RC55Y resistors) Parts from RS Components
WNA MKII Kit Parts from White Noise Audio
EVOX RIFA PHE 450 caps - (more interesting parts.... Welwyn resistors, Rubycon electrolyte caps. etc.) Parts from Distrelec / Schuricht
Black Gate NX, Nichicon KZ electrolyte caps, Nichicon FG electrolyte caps, Holco H2/H4 resistors Parts from Michael Percy Audio [Ordering Information]
parts conneXion - The authority on hi-fi DIY parts and components
Headphone Amp with OP - my conception with BUF 637T or LM6181 and good OP's NS - LM6171, LM6172, LM6181 BB / TI - OPA655P, OPA134, OPA2132, OPA2227, OPA2228, OPA627, OPA637, OPA2134, OPA227, OPA228, OPA604, OPA2604, BUF634P, BUF634T, DRV134 AD - AD711, AD811, AD797, AD9631, AD9632, AD812, AD823, AD8610, AD797, AD843, AD847, AD8065 PMI - OP279, OP113, SSM2135 ON Semiconductor - SE5532, SA5534 / SE5534 Maxim - MAX410, MAX412, MAX427, MAX437 Look like's as in BUF634_Schemas Or as Per-Anders Sjstrm's - QRV-04 the high performance smd headphone amplifier
Viewcom - Holco resistors Viewcom Electronics - Main
In Forums - about WNA New - old flaggshiff WNA MKII New! WNA MKll Head-amp kit. - Page 1 New! WNA MKll Head-amp kit. - Page 51 ...... Some links are dead! Head-Fi (Headphone Hi-Fi and Portable Audio) - New! WNA MKll Head-amp kit. Head-Fi (Headphone Hi-Fi and Portable Audio) - New! WNA MKll Head-amp kit. New WNA MKlll announced! - Head-Fi (Headphone Hi-Fi and Portable Audio) rock grotto - WNA MKll is here!! rock grotto - New WNA MKlll announced!! rock grotto - WNA Headphone Amp rock grotto - WNA MKlll minor glitches.... View Circle - White Noise Audio
My current WNA MK II Headphone Amp project
DIY Cables
My current CD 650 tuning project
DIY Tips
Graham Slee "green Solo" Headphone Amp
Graham Slee "Green" ERA GOLD REFLEX Phono Preamp
Tuning Revox Turntable B790
My preferred Music
Audio Projects - Main
Black Gate as a super-E-Caps capacitor Jelmax Co., Ltd closed its doors in August 2007, Black Gate production has stopped in 2006
Black Gate TOP Page english (from web.archive.org) Some Links are to web.arcive.org Jelmax H.P. BlacK Gate - The champion of the circuit cleaning; Black Gate as a super-E-Caps capacitor Jelmax H.P. BlacK Gate - The champion of the circuit cleaning; Black Gate as a super-E-Caps capacitor (web.archive.org) Inside Black Gates - Structure More about Jelmax H.P. and Black Gate! Inside Black Gates - Model inside Black Gate - Features Table 2: Distortion Characteristics of Capacitors Table 3: Frequency vs.Impedance and E.S.R. Characteristics（Black Gate N 100V 2200μF Pictures from Jelmax Co., Ltd, BlackGate.jp archived in web.arcive.org The champion of the circuit cleaning; Black Gate as a super-E-Caps capacitor. AC/DC Compatible Black Gate N,NX Some Links are to web.arcive.org Jelmax Co., Ltd closed its doors in August 2007, Black Gate production has stopped in 2006 Black Gate capacitor (wikipedia) Step 4 - the final circuit 〈Performance〉 It was surprising that all the problems worried about at item (3) were resolved by replacing all the capacitors with the super-E-Caps. An amplifier made by Ippinkan, in which all the capacitors are replaced by the Black Gates, is connected to the output side. 〈Capacitor〉 BGN 16V 33μ2 Non-polarized Black Gate Super-E-Caps -------------------------- BGN 50V10μ2 Non-polarized Black Gate Transcendence electron transfar What is the "Super-E-Caps"? -------------------------------------------------------------------------------- A pair of nonpolarized Black Gate electrolytic capacitors are particularly connected in parallel or in series so that each one of the capacitors cancels the internal magnetic flux generated by the other, thereby completely eliminating internal resonance and decreasing total impedance to absolute zero as the frequency increase. An ultimate DC current power source revolution by the ultra electrolytic capacitor Black Gate - 無題ドキュメント Source (C) - Jelmax H.P. TOP page
Black Gate alternative Nichicon UES Bi-Polarized, For Audio Equipment For the 1000µF - Nichicon 1000µF 25V UES1E102MHM
Farbcode für Widerstände 4 - Berechnung Farbcode Widerstand Widerstandstabelle Farb Code Ringe - sengpielaudio Farbcode für Widerstände 12 - Rechner - Widerstand mit 6 Ringen Ringe Widerstandsbestimmung Farb Farbringe- sengpielaudio
Widerstand-Farbcode-Konverter für 5 Ringe und Diagramm \| DigiKey Electronics

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Nachricht an mich hifiaudio [at] stockhammer [dot] at
Ich lehne jede Verantwortung und Haftung für den Inhalt (auch Urheberrecht!) der von mir verlinkten Seiten und auch der zitierten Textstellen ab!
In der Linkliste finden sich sicherlich einige Links die nicht mehr funktionieren da der Betreiber seine WEB Seite still gelegt hat. In diesem Fall lohnt es sich, den Link zu kopieren und in der Seite der WayBackMachine archive.org einzugeben. Meistens findet man da noch den Inhalt, man muss gegebenenfalls auch in der Zeitachse danach suchen. In the link list you will certainly find some links that no longer work because the operator has shut down his WEB page. In this case it is worth to copy the link and enter it in the WayBackMachine archive.org page. Most of the time you can still find the content, but you may have to search for it in the timeline. Some Archive only! No guarantee for who is behind the linked pages today! If you find dubious content, please report it! Einges nur Archiv! Keine Garantie dafür wer heute hinter den Verlinkten Seiten steckt! Wer bedenklichen Inhalt findet, bitte melden!
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My Audio Project - Headphone Amp WNA MKII Mein Audio Projekt - Kopfhörer Verstärker WNA MK II Sie können mir auch in Deutsch antworten :-)

Some Archive only! No guarantee for who is behind the linked pages today! If you find dubious content, please report it! Einges nur Archiv! Keine Garantie dafür wer heute hinter den Verlinkten Seiten steckt! Wer bedenklichen Inhalt findet, bitte melden!

My Audio Project - Headphone Amp WNA MKII
Mein Audio Projekt - Kopfhörer Verstärker WNA MK II
Sie können mir auch in Deutsch antworten :-)

Some Archive only!
No guarantee for who is behind the linked pages today! If you find dubious content, please report it!

Einges nur Archiv! Keine Garantie dafür wer heute hinter den Verlinkten Seiten steckt! Wer bedenklichen Inhalt findet, bitte melden!