Another vote for the Shugang cryos. Bought a quad for a PP amp I had some time ago. Really surprised how good they were, better than a NOS set of RFL’s I also bought at the time.
“Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”
Hunter S Thompson