Best tube amp for stock AKG 701 head phones

Singlepower Extreme or one of the Singlepower slam models. Either PPX3 or MPX3. Some good deals on used amps at www.head-fi.com

Singlepower's PPX3 SLAM amp works well with my K701s...

Audio research..any model

I don't know what your budget is and I'm not familiar with the amps you've listed, but I would look at one of these:

http://www.meier-audio.homepage.t-online.de/index.htm

The Eartube to be exact. I have an HA2-SE and I'm very happy with it. Dr. Meier is very easy to deal with. Go to www.headfi.org for more opinions.

Ray Samuals Raptor. Been loving it with 701's for about a year.

Dbk,

The amps you've noted should work well with the AKG 701, especially the W6. I'm using a Cayin HA-1A with mine and looooooove it. The Cayin has a lot of power and exhibits great control over the AKG. YMMV.

Cheers,
Garry