Class A Solid State Sound

The classic comparison is between Pass And Boulder Warm VS Dry, Tubish vs Transistorish. I am not totally sure about this but there is something about Class A bipolar amps which causes the designers to want to use fans and fancy bias tracking schemes. Do they generate more heat or require higher bias voltages. Pass seems to always avoid this but he does not run his power higher than 300 watts whereas Boulder will go much higher. JC simply switches over to AB which you can hear in the JC 1. Push it into steady AB and it loses its effortlessness. It still gets as hot on low impedance loads as a Pass amp. 

It all comes down to the way the amp sounds into a specific speaker and the only way to know that is to hook them up and have a listen. You can make assumptions all day long and many of them will prove right. But, assumptions are the mother of all f--k ups. A less expensive amp may sound just as good as a more expensive amp into a specific speaker and we are all price sensitive to one degree or another.  

I have heard great examples of both types. It is interesting that Atma-sphere amps have been forgotten in this discussion. They are class A OTLs Tube amps and many say better than any type of class A SS amp.
They all get hot so why not have a little glow with it?