I replaced the NOS Brimar 6922s in my power amps with Amperex 6DJ8s - first the Bugle Boys and then the Orange globe A-frames. Both were a *major* improvement. The BBs are a tad warmer and a little less detailed than the A-frames. I ended up running a mix of the two.
Replacing Sovtek 6922 for NOS
I have the Logos, the newest hybrid amplifier from Pathos Acoustics. The original tubes are Sovtek 6922. Any good? I suppose I could get a much better overall sound if I upgrade to NOS tubes within the ECC88/6DJ8 family. Amperex (BBoy) and Mullard seem to be very good. But I really would like to know which are your preferences. Thanks. tgm