How HOT Does your Class A Amps Gets?

megasat16 · Jul 7, 2015

Here is the temp reading from my 60WPC Pure Class A Push-Pull Amp after 30 minutes of warm up. It gets warm up pretty quick and it already reached about 120F after 5 minutes warm up. So, this amp is biased HOT!!!

151F at the heatsinks and about 100-105 around the whole aluminum chassis.

It draws 500W power (constant draw) and dissipates nearly 240W for each channel at idle.

Before you ask, it's a Pioneer eXclusive M8 that I have been comparing to the 845 SET amps.

In contrary, the 845 SET only draws about 300W constant for 22WPC output. :smoke:

theophile · Jul 7, 2015

More pics of the M8 or we boycott the thread. :smoke:

Frank Sol · Jul 7, 2015

My Krell KSA 150 gets sooo hot (How hot is it?) That I am playing a TPA3116 chip amp tonight

edwyun · Jul 7, 2015

Spec is 113-122F on the Thresholds and 120-130F on the Pass Labs. All four are running. Thermal protection is around 160F, though that has never happened.

The issue is not temperature but sufficient heat dissipation.

mad shadows · Jul 8, 2015

:worthless

whoaru99 · Jul 8, 2015

I don't have a pure Class A amp, but my Audio Research 100.2 idles at about 115F in a 65F room.

Heat sink temp is generally a rise above ambient temp. What is the (room) ambient temp with 150F at the heat sinks?

rlisin · Jul 8, 2015

My Philips 22AH561 idles at about 150F at the heat sinks. This is its normal operation, and the amp is not even pure class A, only first few watts.

I don't use it in the summer

edwyun · Jul 8, 2015

mad shadows said:
:worthless

Here's an older photo. In the summer, I generally have to cool the room first before being able to listen with the quad amps running. It's bearable for a few hours. Enough to get my music fix. Anytime besides summer, no worries...

Bstable · Jul 9, 2015

My Pioneer A-27 gets about 128 degrees according to my remote weather station sensor that I placed on top of the unit near where I perceived to be the hottest area.

megasat16 · Jul 9, 2015

theophile said:
More pics of the M8 or we boycott the thread.

Yeah. Yeah, I know! Here is the M8 and it's brother C7A. Needs another M8 so I can bi-amp an active setup.

M8 wasn't running when the pic was taken so the power LED was off.

whoaru99 said:
I don't have a pure Class A amp, but my Audio Research 100.2 idles at about 115F in a 65F room.

Heat sink temp is generally a rise above ambient temp. What is the (room) ambient temp with 150F at the heat sinks?

Good question! Ambient temp is my little room was 80F where the temp for the amp was taken.

edwyun said:
Here's an older photo. In the summer, I generally have to cool the room first before being able to listen with the quad amps running. It's bearable for a few hours. Enough to get my music fix. Anytime besides summer, no worries...

Pictures not loading?

Bstable said:
My Pioneer A-27 gets about 128 degrees according to my remote weather station sensor that I placed on top of the unit near where I perceived to be the hottest area.

I guess it would be a tad hotter if you measure with the thermo coupler. I also had M-22 which I will take a measure later on.

theophile · Jul 9, 2015

Oh YUM. :drool:

mad shadows · Jul 10, 2015

:drool:

SPL db · Jul 10, 2015

:thmbsp:

How HOT Does your Class A Amps Gets?

megasat16

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theophile

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edwyun

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megasat16

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theophile

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mad shadows

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