Ditto, Pops. Mullards put the 14 at a level I feel only the 16LS can beat. Our 14LS is running selected, matched pairs and was compared--at length--with the 6922/17LS. It was no contest. With gain at 99, you have to have your ear next to the Avalons to hear any tube noise. Mullards are far superior to GE, Sylvania or any other 6GK5, all of which I tried. I also found Sovtek 6922s weren't the answer in another preamp. They're undoubtedly used widely because they're readily available, quite reliable and cheap and, in many applications, apparently provide acceptable response. As for milspec examples, of which there are three or four grades priced accordingly, I have no direct experience, so can't say all 6922s are undesirable.
CJ Premier 15 & 17LS Tube Suggestions
I have been using a conrad-johnson premier 15 phono preamp for about 18 months and just purchased the premier 17LS preamp six months ago. I am very happy with this pair except for what I consider to be excessive tube noise from the stock tubes. With the 17LS set to mid-range (50 on the display), I hear, what I think is excessive tube noise for units at this price range. I haven't had time yet to experiment (too much travel) with different tubes. I am looking for suggestions for low noise tubes (and sources of tubes) that would improve upon the stock tubes I am currently using. Any suggestions for different brands of tubes and where I can get them would be greatly appreciated. Thanks in advance for the help!