I dealt with upscale audio on NOS 6922's for a BAT phonostage. At first, Kevin recommended the Amperex 7308. As these were going to cost $100.00 each I decided to wait. After a few months, I contacted Kevin again about the 6922's and mentioned that he had previously recommended the Amperex tube. I Asked if they were still his "personal Fav." He told me they were but not in BAT equipment. Recommended the Ediswan 2492. I bought 4 of them. They did not work out for me. I had two go bad right away. I think he called it "microphonic." Anyway, I sent the tubes back and he replaced two of them. Long story short, these tubes did not improve the sound and in fact never really worked that well. I went back to new production Sovtec's.
Kevin was real good to deal with but I think that the BAT equipment is very sensitive to what tubes it likes and Kevin kinda realized that. Sounds like he is getting totally away from recommending NOS for BAT stuff. I would take his word for it. It has been my experience that Bat and NOS don't mix.
Kevin was real good to deal with but I think that the BAT equipment is very sensitive to what tubes it likes and Kevin kinda realized that. Sounds like he is getting totally away from recommending NOS for BAT stuff. I would take his word for it. It has been my experience that Bat and NOS don't mix.