Just an amplifier change? That's funny. Julian Hirsch used to say that below a certain level, I think it was 0.1% or maybe 0.01%, distortion is inaudible and all amplifiers therefore sound the same. I'm sure that on his undoubtedly good system more than 50 years ago, that is what he experienced.
Since Classe uses Class A, a poor choice for an audio amplifier, moving to an original 3B would be a startling upgrade.
