What could I expect to hear from a Class A amp?

I use a class a amp with 88db 4ohm speakers and it is definately worth it imho. My experience is that it takes 45 minutes to warm up with improvements up to 4 hours. I leave the amp in "standby" mode and never turn it off. Standby does not generate heat but keeps enough current that it doesn't experience a cold start. It generates 150W into 8 ohms 300W into 4 ohms and 600W into 2ohms. It will play ear crushingly loud. Compared to ab amps I've had it has more low level detail and never shows a hint of strain even with the minimum impedance of 2.5 ohms on my speakers. With any given setup any given individual may prefer a different set up and few generalizations can be made. My personal belief is that properly executed ss amps with large power supplies capable of doubling down far more than their ab counterparts with much smaller power supplies are ideal for high impedance loads with reasonable sensitivity. - jim

Spatine, As I've said I'm a big fan of Nelson Pass but in my experience I think ( and this is just my opinion) Gryphons class A amps are superior for some applications. The Antileon signature is $31,000 the Colosseum is $50.000 and the Colosseum monos are ( I think) $75,000. What makes them more universally useful is that they continue to increase class a power down to 1/2 ohm impedance. ie. 150w/8 ohms, 300w/4ohms, 600w/2ohms, 1200w/1ohm, 2400w/.5ohms. They have 2 power cords and I plug each into a dedicated 20amp outlet. Now in practice they would rarely exceed 600w output but they are impervious to load. This won't matter to people with efficient speakers with benign loads but it mattered to me in my case. That said Pass represents better value and if you don't need the extra oomph then I would go with them. If however you really dig class A but have challenging speakers or money is no object then Gryphon is a better way to go IMHO. This is not a put down of Pass. I really like their electronics and I especially like their people and business philosophy. - Jim