And for all you SET guys I should say right now I’m listening to Claude Hopkins "Lowdown" on a 2a3 amp, but a pushpull 2a3 amp. It sounds fantastic and there are many ways to skin a cat in audio.
I have heard accounts of many others who report the same! I enjoy running both a LM805ia SET and a Luxman MQ-88uC push-pull. Always wanted to try a quality 2a3. And I'm still hunting for a 300b as well!