How hot is pure Class A solid state vs. SET?

In class "A", my Plinius SA 100 MKIII runs quite hot. The faceplate is hot to the touch, the heatsinks are hotter. My EL 34 VAC PA 35.35. doesnt't seem to put out near as much heat.

Dan

I had a class A Musical Fidelity A100 and now have a 300b SET. No contest. The A100 ran much hotter.

For Class A, the heat generated in inversely proportional to the Sensitivity of your speakers.
Since it is always going to draw 200W from the wall socket, the amount of energy "left" after driving the speakers will be spent as Heat...so a Totem may not cause the amp to generate too much heat but a Proac just might

in a Class AB, since the power input varies depending on the speaker load, this dissipation is tno too much of an issue (but since a percentage od the amp is biased into Full Class A, very sensitive speakers may still run with the amp on Class A mode)

I think in Tube amps, the Big Transformers usually use up a lot of power and hence on a apples to apples, for the same poser rating their heat generation could be much lower

For Class A ... since it is always going to draw 200W from the wall socket, the amount of energy "left" after driving the speakers will be spent as Heat

True, but it should be kept in mind that almost all of the power sent to the speakers will also be converted into heat, by the speakers, and will wind up contributing to the heat in the room anyway.

Regards,
-- Al

My Aleph 2s run hot. During the summer months here in NYC, I have to turn the AC on to cool the listening room and then shut it off during listening. After about 3 hours of continuous playing through the Alephs, I can feel the room getting hot. Not unbearable until maybe 4 or 5 hours. But on really hot days, I switch amps. :)