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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.

This brings us back to SS vs tube discussion. Tube needs less negative feedback than SS in general and therefore it sounds more natural and open. Some tube amps can also achieve zero neg feedback but the problem with them are that they are bandwidth limited and they can not drive low impedance speakers.

The thing with neg feedback is exactly what was described about the ability to hear more and the "no more haze" clarity.

I have heard a Class D amp recently (can't remember the name) compared to a SET amp. The Class D amp sounded very clean and fast with good bass and highs, but like someone mentioned before, the tone and reverb are not as good as a good tube amp with no neg feedback. Also the Class D amp is too dry for my liking. But I am sure that the future improvement on Class D amps is enormous as the main benefit is their ability of amplifying with any neg feedback.

Negative feedback ruins the sound of most amps. How can adding old signal to new signal be any good? It is the major cause of haze.


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