Whatever tubes you choose to purchase, be certain they are screened/graded for low noise. That's important for use in a preamp. ie: (http://www.upscaleaudio.com/grading-and-matching-small-signal-tubes/)
Good 6922 tube for my CJ ET-3 SE pre-amp?
This is a follow-up to my recent thread on lowering the noise floor produced by my CJ ET-3 SE pre-amp. I called CJ and they seem pretty sure the issue is in the stock tube (Electroharmonix 6922) and even suggested I try a Telefunken. What other 6922's (or equivalent) should I be considering?