While it's true that most of the Audio Note SET's are 300B based, having heard a couple of them and the "cheapest" 2A3 amp, as good as the 300B amps are, I like the 2A3 amp best. I hope to get a discontinued P4 (parallel 300B's) in soon to do another comparison, but the 2A3 Neiros are wonderful.And yes, I'm new here and will keep my head down awhile. I don't know a lot about SET's and am hoping to learn by listening to those who do. I've come to SET's via solid state, then hybrids, and then push-pulls. I'm staying.