What are the advantages to a Class A amp & what are the trade offs?

Typically more expensive per watt of power, higher energy consumption, hot running and requires adequate ventilation, can require more maintenance due to the internal heat build up.  Class A amps tend to be big and bulky.

As for the difference in sound when compared to other typologies, that is subjective. 

+1 testpilot

While Class A has it's fans, there is a lot more that goes into the design of an amplifier besides the heat and power wrecking that it does!


The truth is you need to hear for yourself on your own speakers to tell if it is worth the heat, weight and operating costs.


Modern solid state designs run Class A for most of the time you are listening anyway, so, arguably, the tech no longer matters like it used to.


Other factors, like having no feedback, are often bigger sound drivers. 

Best,
E

The old school answer of course, was that Class A has lower distortion through the zero volt crossing region.

How audible that is anymore though.... I don't know.

Never buy based on design, etc. Buy based on how it sounds. All this other stuff, heat output, etc, may or may not matter depending on your situation. ie small room, poor ventilation, hot weather, probably not the best place to put a 500 watt heater. Unless maybe it puts out music that is to die for. Which you will only know one way, by listening.

Thanks guys. I knew about the heat and power demands. Wasn't sure what sonic advantages it might have. There is a Canary M70 which has drawn my attention. Its in the power range which I have found to work well with my speakers. Its close to my budget. But i can't find any reviews or much info about it. If i can recoup my $$$ I've been known to take a chance. Sometimes you lose. But sometimes you hit it outta the park. Then too, its may be a  sideways move. I'm kinda itching to pair another amp with my new Preamp (CJ CT5). System sounds Great but I can't seem to leaver it alone.