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The new amplifiers is getting warmer and hot

Why the newer amplifiers / AV Processors and receivers is getting more warmer and hotter than the older versions ?
i have 2 1990s amps citation 7.1 and harman Kardon signature 1.5  runs cool compared with my current Parasound A21+
128x128lordrootman
erik_squires
15,657 posts
 
Are you comparing Class D amplifiers with Class A/B ? If so, that's your answer. :)


noromance's avatar
noromance
9,404 posts
 
But doesn't Class D run cooler? More likely that the heavier, more expensive to build heat-sinking capacity is reduced in the newer amps along with more heat tolerant components which allow them to run hotter without damage.
erik_squires
15,657 posts
 
The Parasound A21 is A/B. I had the original, and they ran warm.  I measured the wattage, and as I recall, the idle power was 2x spec.

The other two I believe (but I am not Google) are class D.
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