Is this amp THD good enough?

THD turned out to be 0.0000018% I is stable and absolutely flat response.

is this an simulated number or an measurement made at the amp output with an FFT analyzer ?

.


It's complete nonsense. There is absolutely nothing here that could be considered an overall advance, performance wise, over a standard, properly implemented Self-like "Blameless" amplifier. In fact, quite the opposite.

No demonstrated comprehension of even the basics of frequency compensation either - the ineptitude starts with the stupidly high gm of the input stage with that emitter-to-emitter coupling capacitor and the lack of comprehension of the implications thereof.
 
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