Cary SLI-80 Signature: 6922-6SN7-5U4 tube shootout

Actually, the 5U4 rectifiers are Sovtek as are the 6922s. The 6sn7s are chinese. At least that's what was in mine. The 6sn7 were replaced by 1950's Raytheon's and the 6922's were swaped for some NOS Ediswain. These changes were suggested by Kevin Deal of Upscale Audio and they are a good return on the investment (approx. $200). You should give them a call.

The 6922/6sn7 swap resulted in better high freq. sound along with a bit better detail. I guess most of the audiophile jargon would apply - air, sound stage, image all improved. YMMV. Over the next few weeks I will be checking out some Tungsram and Siemens 6922s along with some Ken Rad VT231 (6sn7 equiv). I suggest a visit to the audio asylum tube section if you haven't visited already. The asylum posters are very helpful.