stratotone":2kc001j4 said:
A tube rectifier amp *IF* it's power section is really pushed and the front end is fairly clean. I'd also say EL84 amps before I'd say class A, personally. But the main thing is cranking the hell out of the output stage so the tube rectifier can't 'catch up' and it compresses more.
I have to somewhat disagree here about EL84s/class A. True that many EL84 amps exhibit sponginess, but a lot of those are also class A...my Boogie Studio .22+ is pretty damn tight for a 2xEL84 amp, even when cranked. My Matchless Chieftain is a class A (questionable if its true class A) 2xEL34 amp and its got a great spongy feel to it. A buddy used to have some sort of Tophat (don't remember the model...4x6V6 in class A) that I borrowed for a while and it was spongy as hell.
To support your point though, my old AC30 was probably the spongiest amp that I've ever played...but is it the tubes or the fact that its a tube rectified class A amp? Or both?