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| Headphone Amps (full-size) Discussion of desktop headphone amps. |
11-07-2007, 01:55 AM
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100+ Head-Fi'er
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Join Date: Dec 2006
Location: D/FW
Posts: 306
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No hum in my stock tubes either...
EDIT: Sorry, mine is the 336i - Got my threads mixed up...
__________________
Rig 1:
Marantz CD5400→Behringer DEQ2496→DarkVoice 336i→Senn HD650.
Rig 2:
Sony RCD-W500C→Behringer SRC2496/FBQ1502→Original Master→Senn HD650.
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11-07-2007, 02:02 AM
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Banned
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Join Date: Aug 2007
Location: Orlando, FL
Posts: 1,624
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Quote:
Originally Posted by Jo6Pak
No hum in my stock tubes either...
EDIT: Sorry, mine is the 336i - Got my threads mixed up...
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They use the same stock tubes.. it's no biggie. 
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11-07-2007, 02:07 AM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,437
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Quote:
Originally Posted by nick20
They use the same stock tubes.. it's no biggie. |
Actually, that's only half true 
The 337 uses the 6SJ7 driver tube, versus the 6SN7 for the 336i (and these are similar looking, but electrically very different tubes).
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
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11-07-2007, 02:33 AM
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Banned
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Join Date: Aug 2007
Location: Orlando, FL
Posts: 1,624
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Quote:
Originally Posted by Skylab
Actually, that's only half true
The 337 uses the 6SJ7 driver tube, versus the 6SN7 for the 336i (and these are similar looking, but electrically very different tubes). |
Oh yeah.. I forgot. It's been a while since I read the first page... 
And Mazuki makes tube adapters for the 7N7 too, which are replacements for the 6SJ7's correct?
EDIT: quick search on eBay shows a few 6SJ7's, and they aren't at all pricey, like some 6SN7's. Which is a good thing...
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11-07-2007, 02:37 AM
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500+ Head-Fi'er
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Join Date: Aug 2006
Location: current NY, also CA
Posts: 516
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Would this amplifier be easy to mod into use for balanced headphones due to its dual mono configuration?
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"I wish I could marry a toilet seat, it accepts everything I have to give it"
Home: foobar > m-audio transit > bel canto DAC2 > darkvoice 337 > ad2000
k1000
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11-07-2007, 03:19 AM
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500+ Head-Fi'er
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Join Date: Sep 2005
Location: Los Angeles, UCLA
Posts: 569
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Wow, a lot of interest in this amp lately, this is great! Finally this amp is getting the attention it deserves.
Quote:
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And Mazuki makes tube adapters for the 7N7 too, which are replacements for the 6SJ7's correct?
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7C7 are the loctal equivalents. They're even cheaper and sound at least just as good!
I'm also in the process trying some other tubes, EF86, 6AU6 etc. I'll report back later about them.
Quote:
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Would this amplifier be easy to mod into use for balanced headphones due to its dual mono configuration?
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I don't think it can run balanced, but I'm not a circuit expert. You'd probably have to ask John Broskie or something.
As a side note, after finishing this Bijou (aka Cavalli Lovell Futterman) I have to admit, I haven't listened to the 337 in over a week. The bass quantity doesn't quite compare to the 337, but the darkness of the background and the clarify of the music coming out of this Bijou is really astonishing. But since I'm comparing a commercial amp to a DIY endeavor, it's apples and oranges. Long live the Darkvoice 337.
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11-07-2007, 03:32 AM
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1000+ Head-Fi'er
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Join Date: Mar 2006
Location: Bapetikosweti
Posts: 1,417
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Thanks guys for reporting back on there being no hum with the stock tubes...thats what I had presumed.
I suppose Darkvoice or Jasmine do have some effective QC, because the only hum experienced is that with certain rolled tubes, which I'm guessing is because the auto-biasing of the amp just doesnt quite work as well with that particular make&model tube.
Enjoy the 337, I hope some folks with access to other tube amps like Woo or SP can do some comparisons
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11-07-2007, 04:27 AM
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500+ Head-Fi'er
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Join Date: Sep 2007
Posts: 532
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Quote:
Originally Posted by musicmind
tomtjx, I know you mentioned you didnt listen at all with the stock tubes, but I wonder if you can check if you have any humming with the stock tubes.
I'm curious about whether jasmine checks for this when they "burn-in" your amp.
I'd hate to have to ship back a 15kg amp if it werent checked before shipping
Thanks, keep up posted on your experiences |
Yes, both Jasmine and the factory check out the amp and burn in the stock tubes till no hum. jasmine emailed me while listening to make sure the amp functioned correctly.
After 5 hours the hum was almost gone here. I just got back from playing a performance and it is 10:20pm , absolutely no hum. All tubes are dead quiet.
This amp is phenomenal. Incredibly musical and all the seduction of tubes in the best sense. There is a lifelike presence to the sound that is uncanny.
The dynamics are immediate and recreate the concert hall experience exceptionally well. And I mean a great concert hall.
Some halls suck out the life and dynamics like a mediocre amp.
this amp is like the Myerson hall in dallas, every detail and dynamic shading is there.
A great hall lives and breathes with the orchestra and this amp does the same.
I am very impressed (and that is an understatement) :-)
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11-07-2007, 12:30 PM
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Headphoneus Supremus
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Join Date: Oct 2005
Location: Empire State Building
Posts: 2,894
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Musicmind - back in the 60's - 70's, I remember replacing tubes that would be initially just fine - then hum in 2 weeks. There are no guarantees. You could test just fine and still hummmmmmm. While I prefer the sound of tubes......they can also be a pain in the a*s (I hate to use asterisks rather than be more frank).
__________________
German engineering in the haus..........Jah!
Man is an animal that makes bargains; no other animal does this. No dog exchanges bones with another - Adam Smith
Nature's laws are the invisible government of the world - Alfred Montapert
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11-07-2007, 12:54 PM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,437
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Tomjtx, I am really glad to hear you like it. Nice to see another happy 337 owner! It's an astoundingly good amp for the money IMO.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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11-07-2007, 04:46 PM
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500+ Head-Fi'er
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Join Date: Sep 2007
Posts: 532
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My only complaint is a tiny chip in the paint I put there myself AARRGGHHHH!!!
Time to buy some glossy black nail polish and make it disappear :-)
It is a very tiny chip.
I can never play a guitar for more than a week without dinging it too.........oh well.
It is a phenomenal amp.
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11-07-2007, 10:43 PM
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Headphoneus Supremus
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Join Date: Jul 2005
Location: Dallas, TX / St. Louis, MO
Posts: 3,152
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Now... Who's Right???
OK... you guys say its great!
On the other thread... they're saying its only slightly better than the DV336.
So... who's right???
__________________
Sources: Marantz SA-8001 SACD/CDP - California Audio Labs Delta Transport - California Audio Labs Alpha Tube DAC - Monarchy Audio M24 Tube DAC - Monarchy Digital Upsampler - Sony Walkman EJ612CK & JD01 Portable CDPs -- Sold: Musical Fidelity XDAC v3 -- Music Hall MMF CD25 1+ CDP - California Audio Labs Sigma II Tube DAC.
Amps: WooAudio 6 SE Maxed - Aphex 204 Aural Exciter (to remove HD650 veil) - Shellbrook Maxi Moy Portable - Grant Fidelity B-283 Tube Buffer -- Sold: Singlepower Extreme (tried, but canceled order) - Darkvoice 332 w Svetlana 6S19P-EV & Tung Sol 5654 tubes (superb) - Musical Fidelity X-CANv8 - Musical Fidelity XCAN v3 (with PinkFloyd Mods) - Musical Fidelity X10 v3 Tube Buffer with XPSU v3 - Graham Slee Solo 2007 - WooAudio 3 - Grado RA-1 - Shellbrook Audio Lab Hybrid Head (Millet Hybrid) - Core Audio Tube Buffer - Meier Audio Move.
Phones: Senn HD580 (new version modded & de-veiled) w RAL Senn Cryo-Silver cable - Grado RS-1 - ATH AD2000 - Denon AH D5000 w Markl Mods -- Sold: Bose Tri-Port ("the beginning”) - Senn HD280 Pro - Senn HD600 x2 (old versions) & HD650 x2 (old and new versions) w Cardas, Zu Mobius, Headphile Senn v2 Blacksilver cables - Grado SR125 - Grado SR225 - Grado SR325i - Grado GS-1000.
Accessories: Signal Cable Black Magic PCs x2 - Iron Lung Jellyfish PCs x2 - CT Cryo Silver ICs x6 - Shellbrook Silver Mini IC - RnB Audio Sky Blue Mini IC - Caig Pro Gold - Walker SST - Herbie‘s Tube Dampers.
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11-07-2007, 10:49 PM
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Headphoneus Supremus:
Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,437
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It's significantly better, IMO.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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11-07-2007, 10:51 PM
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Banned
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Join Date: Aug 2007
Location: Orlando, FL
Posts: 1,624
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Quote:
Originally Posted by Gradofan2
OK... you guys say its great!
On the other thread... they're saying its only slightly better than the DV336.
So... who's right???
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That "guy" is Mazuki, and is the same person here...
To say the least, since I know you're interested, at least you'd be able to sell it here for a minimal loss, if you felt it wasn't worth it...
I trust Rob's experience and knowledge. I would however, like to try the 337 against a Bada PH-12 [aka "giant killer"](both amps in house).
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11-07-2007, 11:00 PM
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500+ Head-Fi'er
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Join Date: Aug 2006
Location: current NY, also CA
Posts: 516
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have you guys tried the 337 with low impedance headphones such as grados or Audio Technicas? As I understand it darkvoice/tube amps have higher output impedance than normal and don't power these low impedance headphones effectively
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Home: foobar > m-audio transit > bel canto DAC2 > darkvoice 337 > ad2000
k1000
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