Darkvoice 337 - A Review - Page 6

No hum in my stock tubes either...

EDIT: Sorry, mine is the 336i - Got my threads mixed up...

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).

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...

Would this amplifier be easy to mod into use for balanced headphones due to its dual mono configuration?

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

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) :-)

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).

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.

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.

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???

It's significantly better, IMO.

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).

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