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Join Date: Nov 2006
Location: Colorado Springs, CO
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IMO, so called "digital" amps are still class D. They are sometimes referred to as digitally controlled class D.
The only major difference between digitally controlled class D and analog controlled class D is the process by which the PWM signal which switches the output devices is generated.
With analog controlled class D, a conventional analog signal is converted to PWM using a standard technique.
With digitally controlled class D a PCM signal is converted to PWM.
Digitally controlled class D, AKA "pure digital" amps are not inherently superior. There's plenty of info out there on their drawbacks.
That being said, the state of the art seems to be evolving.
"But this one goes up to 11"