I just finished a Black Amp loaner and it was just about ALL of those things, to me anyway. Never heard any air at all. Found it warm and hazy and almost monophonic. Certainly not worth the retail price IMHO. My only guess is that tube amp lovers like it because it's not bity at all, like most SS amps, but still something germanium transistor about it. The Stratus is a tube amp that I am unfamiliar with, but I will check it out. Only the Magni 3 has this in any HP amp I have heard. Class H designs have this because of the complicated power supply. The amp's character can change quite a bit for these type amps depending on power being delivered. BHA-1 character did not change at all on volume position.