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RE: One main difference not discussed ...

"Is that Class D amps do not need any negative feedback to work properly whereas all Solid State Amps need anything from 20 to 40 dB"

Ummm, yes they do.

The Class D amp I heard was zero neg feedback.

"but the problem with them are that they are bandwidth limited and they can not drive low impedance speakers."

Ummm, some of them are not bandwidth limited and some can drive low impedance speakers (not that Maggies are particularly difficult loads).

Show me some tube amps with zero neg feedback that thrives on 1 and 2 Ohm loads. Quad 57s and Sound Lab speakers.

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