Best 6922 tubes for Conrad-Johnson CT6 preamp

I also ended up with the white label PQs and in my CAT amp sound like a very significant improvement over the Sovteks they replaced, but you must have reason to trust your sources as a noisy great tube brand is much worse than a good measuring and quiet Sovtek. If noise is your primary concern, I would proabably get a super low noise graded tube from RAM; NOS is becoming more of a crapshoot as supply dwindles - but if Andy says he has some that measure well, I think you can count on it.

Thanks for NOT suggesting the tube I prefer, it only drives up the price. ))

I just ordered some rare cryoed Russian NOS from ATSI Tubeman

CJ preamps are known for being hard on their tubes.The best choice is usually going back to CJ.Had a friend buy NOS tubes for his Premier unit,all went south in the 1st week.Ended up going back to CJ and the cost was about the same as running NOS.Just a thought.

I just picked up a used quad of vintage steel pin Siemens ECC88's (6DJ8 equivalent) to try in my CT6. The tubes are dead quiet. They're still a little on the "warm" side like the gold pin Amperex but more transparent and more extended in the highs. I've just started listening but I think I like them better than the Amperex and they seem to complement the CJ sound better as well. Supposedly the Siemens E88CC’s (6922 equivalent) can sound even better but I think you’d be hard pressed to beat the ones I just got.