Tubes for modulus 3A ?

I purchased old production Soviet 6922 replacements from ATSI, they offer super low noise units. I have compared them to new production Sovteks in my Audion amp (which is apples to oranges with an AI preamp) and have found them to offer fuller bass, less strident highs and slightly softer mids, though they do sound very similar to the Sovteks on a whole. They are very linear, crisp and to me one dimensional sounding when compared to my favorite Amperex and Mullard and Siemens 6922's, but as Paul stated above the AI eats up these types of tubes. My amp only uses one 6922 along with a 5687 and does not run the signal tubes hard. It took approx. 30 hours of run in before the bass kicked in. I gave a quad of these tubes to a friend with an AI preamp, but he has not yet tried them. I selected these tubes specifically for him after doing research on the subject at Audio Asylum and could only locate them (at the time) in specially selected form at either Upscale or ATSI. I do know of another dealer in Canada that carries them as well, but am not familiar with their testing methods. I will probably install them for him the next time we visit. I actually like the sound of this tube when it is combined with a pair of soft sounding Svetlana output tubes that I use. Together they strike a nice balance. Perhaps you could just try two in the line stage for a start if you use a digital source. I paid $45/mp for the last ones that I purchased

Monk: Very intersting. I will look into the 7dj8's as well. I almost made the mistake of giving our friend some of my Amperex 6922's, but fortunately searched AA before doing so. I will see if I can use the 7dj8 in my amp as well. I enjoy trying out any new tube as long as they are reasonable priced. The last one was an EI 6922 labeled as a Westinghouse (very strange sound, soft but shallow and one dimensional in my amp) that I still kind of liked on classical music. Variety is the spice of life.

Yes, ATSI has a web site that you can order online from - http://tubeman.com/index.htm - I just paid with a credit card. The super low noise versions were on special when I first purchased them, but are now $45/mp. I have ordered three times from them without a hitch and did not bother to audition the tubes (which I am saving for a for a rainy day) the third time around. Upscales "old" production Soviet 6922 equivalents were $50/mp the last time I checked and I have not tried those. I found some Telefunken 7dj8's on the web, but have never cared much for the Tel sound and located 7dj8's in India, but have not yet received a price quote or the brand/manufacturer of the tubes. It may also be an old web listing and I may not receive a response at all.