Back on topic. Using the simplification that a SS amp would produce a clean undistorted output signal then why do you need a THD rating? Wouldn't it theoretically be zero since a SS amp ONLY reproduces the input signal with NO changes? Obviously that's a misstatement. THD levels with SS amps are almost zero but there NOT zero. Thus something is altered in the signal by the amplifier. I'll concede that the THD levels of a tube amp are higher than a SS amp but it's sort of a moot point. The human ear can't really hear any distortion below 1% anyway. For me it's all about the sound quality. My SEP amp sounds much nicer with my speakers than any SS amp I've owned. It's more work to maintain a nice tube amp than to just plug a sand amp into the wall but it's worth it.
Mike
