Source : Halide DAC HD
Amp : Crack + SB
Headphone : Senn HD650
I tried some 6AS7G tubes (RCA , Svetlana, etc.) and allways came back to some straight RCA 6080. For two reasons : I've had problems finding a dead quiet 6AS7G and I prefer the (faster IMHO) 6080 sound. Everybody will tell me I have to try a 5998, but I never had the guts to put 85$ on the table without being sure the tube will be quiet.
I tried the highly regarded Telefunken 12AU7 and the new new stock JJ 12AU7 and always came back to the tube I received from BH : a RCA (Conn) 12AU7WA.
So count me as a RCA fan.
Fabien Fivaz
Thorens TD 160, Denon DL-110, Hagerman Piccolo 2, Reduction (w/ Integration), 2A3 Stereomour, Fostex FE126En in Bk12m enclosures
Halide DAC HD, Crack (w/ Speedball), Sennheiser HD 650