My 6922 Tubes Are Too Bright!

I've been experimenting with 6922 family tubes to tame some of the issues you are having. In my PS Audio BHK Stereo 250 amp, I've found Voskhod "Rocket" 6n23p tubes to be just the ticket. The Reflektor factory's tubes haven't appealed to me so much. I also liked the Voskhods very much in a Music Reference RM5III preamp I used to own. In my PS Audio BHK preamp, I greatly prefer Raytheon 7308's to brighter Amperex, Phillips, EH, & Siemens 6922s and 6DJ8s. The prevailing consensus among most audiophiles is that American and European 6DJ8, 6922s, etc. are the best but I find them to be a bit bright in many applications. As always, YMMV. What sounds good in one application isn't always the case in another. 

photon46,

I am a BHK250 user too, can you describe the sound signature of the Rocket tube and where you got it from?  thx.

I suggest u call Andy at Vintage Tube Services and speak to an expert.
  It sounds like Mullard may be what you need, he can tell you about the sonics of the 6922/E88CC Mullard vs. other brands. But premium tubes are not cheap.

The new production JJ/Tesla E88CC is a very warm tube and quiet tube that I have used in a CDP with success. I've also used it in a headphone amp. It's cheap so give it a try, not much to lose.

There are so many variants. This is one article that I found helpful:

https://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html#6DJ8

But ultimately, it is a lot of trial and error.