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

The manual for the Aleph 30 indicates that it draws about 200 watts from the wall outlet, which as can be expected for a Class A amplifier remains essentially constant regardless of volume level.

Therefore it will put approximately the same amount of heat into the room as two 100 watt light bulbs. As a rough ballpark guess, I suspect that your Almarro draws in the vicinity of one-third of that amount, or perhaps a bit less.

Regards,
-- Al

It looks like the A318B uses a pair of 6C33C's, which is an extremely hot-running tube. Its filaments alone consume in the rough vicinity of 40 watts per tube, assuming both filaments in each tube are used. So your EL84-based amp figures to be considerably more efficient.

Also, just to be sure the light bulb reference is clear, nothing on the Pass amp will come close to being as hot as the surface of the bulbs, since in the case of the amp the heat will be radiated from a much larger total surface area (the Aleph 30 manual indicates that the heat sink temperature will be between 120 and 130 degF). But the total amount of heat radiated into the room by the amp will be about the same as if two 100W incandescent bulbs were positioned at the same location (slightly more than that, actually, as my understanding is that an incandescent bulb will convert about 10% of the power going into it into light, the other 90% being converted into heat).

Best regards,
-- Al

Magfan, interesting (and good) comments.

As kind of an aside, didn't I read somewhere that a person radiates about as much heat as a 100 watt incandescent?

I hadn't ever read anything about that, but some quick calculations indicate it is correct.

Obviously there will be very large differences among different individuals, but if we assume an average of 2250 calories burned per day (150 pounds x 15 calories per pound), and that as indicated here 1 food calorie corresponds to 4.2 kilojoules = 4.2 kilowatt-seconds, the corresponding power consumption calculates to 109 watts!

Best regards,
-- Al

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