@g_nakamoto
The heat generation of an amp does not have as much relevance to its design but much more to the "class" of amplifier it is.
Class A amps are biased almost at the center of the operating range of its output transistors and hence generate a huge amount of heat. It is deliberate by design. Some optimizations and workarounds exist but that is generally the case with class A amps. Unfortunately, those are also the ones that sound the absolute best (in general) in terms of sound quality.
Class B (and A/B) generate much less heat. The more A bias a class A/B is, the warmer it will get however.
Class D are the most efficient amp designs and run almost with 90/95% efficiencies.
These numbers above are typical, some exceptions and design variations do exist however.
The heat generation of an amp does not have as much relevance to its design but much more to the "class" of amplifier it is.
Class A amps are biased almost at the center of the operating range of its output transistors and hence generate a huge amount of heat. It is deliberate by design. Some optimizations and workarounds exist but that is generally the case with class A amps. Unfortunately, those are also the ones that sound the absolute best (in general) in terms of sound quality.
Class B (and A/B) generate much less heat. The more A bias a class A/B is, the warmer it will get however.
Class D are the most efficient amp designs and run almost with 90/95% efficiencies.
These numbers above are typical, some exceptions and design variations do exist however.