Which 6SN7s are you rolling through your MA-1s?@decooney
So many, mainly on the MP3, I have been using CV181-Z (black treasure Chinese boutique) very nice tubes, good bass and best of all no microphonics. Tried the Psvane CV-181TII, really good sound, one died within the month, something is loose inside and the tube wasn't subjected to mechanical stress or anything. Now NOS tubes, 6SN7GTs I like the Raytheons smoked glass, Sylvania's chrome domes are fine, I don't like contrary to what most people say the 5962's red base RCA's, neither the 6SN7WGT's (wartime class) neither the GTAs or GTBs, to me the best sounding are the GT'sThe MA's i'm using exclusively NOS, Sylvania's chrome domes, rca's, tungsols etc.

