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In Reply to: RE: Yes, even Pass Labs Class A get hot.... posted by AbeCollins on April 11, 2017 at 12:27:05
I agree the watts are generating heat, but I'm thinking if the heat is neutralized, if you will,at the heat sycns, then less effect of room temperature.
No matter how we slice it Class A is not efficient and that energy has to be dissipated. I was just thinking an amp that didn't radiate the heat into the room may be more of an advantage if you lived in an area with a hot summer. Which is almost everywhere now, LOL
Follow Ups:
Nirvana Electronic Works (N.E.W) A-20 - a nice little amp you can sometimes find at reasonable prices.Original Monarchy SM-70 - the ORIGINAL SM-70 is biased pretty far into class A, runs in class A down to maybe 2~3 ohms load. Gives you about 25 watts a channel @ 8 ohms. (Don't confuse the "SM-70 Pro" models for class A, they are high-bias class A/B, not class A. I've owned both. The "original" SM-70 sounds better IMHO.) A pair of them, each driven with balanced input in mono, makes a really great amplifier of about 100 watts a side for under $1,000. Because they have no global feedback, their harmonic output is rich in second-order and low in higher-order harmonics, giving these amps a somewhat tube-like character.
Forte 4a, 50 watts @ 8 ohms, 100 watts @ 4 ohms, class- A. With the Soderburg mods, these amps sound WONDERFUL.
I own all the above and can vouch for their sound and reliability.
I do not own but have read that the Pioneer M-22 amplifier- 22 watts / channel @ 8 ohms, class A- is a very good amplifier.
ANd then there are a number of current and vintage Luxman class-A products which have their following.
I have owned some vintage Yamaha "silver" integrated amps which can be switched into low-power class-A mode. I was not terribly impressed with these.
Edits: 04/17/17 04/17/17
I know tubes run hot,but I would look at the Atmasphere s-30 OTL.Single driver with relatively stable 6-8 ohm load.Might be heaven.
Tom:cat
I have never tried an Atmasphere in my system but have heard them elsewhere and they sound very good. I've always wanted one.
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