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Please explain the difference between power amplifier circuits?

As far as high power amps go, for pro level amplifiers, they all sound the same.
The measured frequency response, distortion, etc. is all beyond human hearing. It's all the same.

The pulse width modulation (pwm) are the hot thing because the technology and engineers have caught up to their design and manufacture. People like the weight. They're just as reliable as any technology.
 
@ KramerBassFan: No problem! I searched Google when I wasn't busy today and just got a bunch of crud. Thanks!

@Passinwind: D'oh! My wife is always telling me to look with my eyes, not my mouth.... :D

@seamonkey: Thanks, man!
 
100 pounds of Class D:

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