Originally Posted by pdrm360
So any specific one for HD800?
Well you can checkout my review back on the old thread I mentioned above, as well as other's reviews. Depends what source you have, and your personal preferences. Some on this thread don't care for the Voskhod signature. I personally really like it, and worked hard to get the best of that signture possible. They are not the end all and be all - but what tube is? Overall I think most would agree they are very detailed, have a large soundstage and are quiet, with low noise and microphonics. Some have found them too forward with the HD800s. I haven't had that experience. Maybe try some of the cheaper and easier to obtain '80s - again I would read the review from July. I should also mention that I have two amps besides the Lyr, and a DAC that take the same tube and they have worked really well in all of them. This was a revelation for me and really scaled the sound quality across all my systems - quite a bonus.
Good luck!Edited by rb2013 - 9/18/13 at 5:11pm