It's often misconstrued that the 'D' stands for digital. It doesn't. It was merely the next letter in the alphabet.
Class 'D' topology is old news, having it's first iterations pre-transistor. It is a compromise design that sacrifices sound quality for improved efficiency.
I think what you are referring to is the class 'T' amps that do rely on a digital process to produce gain and apparently have no such sound quality/efficiency compromises. I have yet to hear one, but they are really creating a stir in the audio world.
Class 'D' topology is old news, having it's first iterations pre-transistor. It is a compromise design that sacrifices sound quality for improved efficiency.
I think what you are referring to is the class 'T' amps that do rely on a digital process to produce gain and apparently have no such sound quality/efficiency compromises. I have yet to hear one, but they are really creating a stir in the audio world.