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REVIEW: Four 6AS7G-based home tube headphone amps reviewed and compared - Page 2

post #16 of 51
Great review Rob, where can we purchase the singlepower extreme and look at the prices of options other than 6moon audio? Easily available to UK buyers?

Im guessing that it would work well with darths, so this would be top choice for now.

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post #17 of 51
The only place to buy an Extreme is to directly contact Singlepower Audio.
post #18 of 51
Thanks for the review Skylab
post #19 of 51
Great review, Skylab!

Hope this isn't a threadjack, but is anyone aware of a DIY headphone amp that makes use of the 6AS7G? I can't think of one I've seen and just got a pile of 6AS7G tubes for an OTL power amp project. If anyone has seen a DIY schematic, please post details.
post #20 of 51
Thread Starter 
I know n_maher designed a 6AS7G amp recently, which i think he intends as a DIY. But it's a SERIOUS amp
post #21 of 51
Quote:
Originally Posted by Uncle Erik View Post
Great review, Skylab!

Hope this isn't a threadjack, but is anyone aware of a DIY headphone amp that makes use of the 6AS7G? I can't think of one I've seen and just got a pile of 6AS7G tubes for an OTL power amp project. If anyone has seen a DIY schematic, please post details.
Here you go .... this amp looks very similar to the Woo 3.

HeadWize - Project: A Single-Ended OTL Amplifier for Dynamic Headphones by Aren van Waarde
post #22 of 51
I bet the SpaceTechLabs' bass problems can be easily fixed with a larger output coupling capacitor. Can you take an inside pic of that amp?
post #23 of 51
Thread Starter 
Hi Mike - that makes sense - I will do that, and maybe you can recommend an upgraded cap for me

I would like to fix that issue of the SpaceTechLabs amp, since it's a really good sounding amp otherwise...
post #24 of 51
another great review skylab
btw does your extreme stock or have other mods?
post #25 of 51
Thread Starter 
Thanks! My Extreme is stock.
post #26 of 51
Quote:
I will do that, and maybe you can recommend an upgraded cap for me

I would like to fix that issue of the SpaceTechLabs amp, since it's a really good sounding amp otherwise...
It would really depend on how much space is left in the case. The capacitance is the big issue, so I would see if those 70uF Solens will fit. If that works well, then parallel on some boutiques (Mundorf, teflons, etc.)
post #27 of 51
Gee, the Skylab reviews keep getting better. Not only was I looking to get the 337 and SP Extreme, I was looking for comparisons. You read my mind.

I agree that the 6AS7G is a good sounding tube. But I also like the 6SN7 that have a great vintage selection as well as newly manufactured tubes for around $15 each.

Thanks again for your hard work that helps make our hobby so enjoyable.

In Skylab we trust.
post #28 of 51
Superb review Skylab!

I've learned alot from this review, not least that fact that I now
want a Singlepower Extreme somewhere down the line.

Cheers!
post #29 of 51
Thread Starter 
Thanks guys!

I am going to have my SpaceTechLabs amp modded to try to improve the bass performance. Will keep everyone posted.
post #30 of 51
Quote:
Originally Posted by Skylab View Post
Thanks guys!

I am going to have my SpaceTechLabs amp modded to try to improve the bass performance. Will keep everyone posted.
Cap upgrade certainly could help with Bass performance, it might also be the way the transformer is wound. Great review Sir Skylab!!
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