LKA

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/1080843/opa1632-thd-support-in-the-spice-model

I use few mA for better high freq thd (above 5kHz) Danhard usually uses one Vbe drop between bases, so not zero.

With heavily under biased OPS (1-2 mA per output pair, no emitter resistors) it's no problem to get THD1 -120dB. For low N you have to...

All in all, it is a toy, not a serious amplifier.

You are kidding, right? It has no power of significance and yet it claims to be a "power" amplifier. It's a medium powered 50w mono...

That's not proof. Some understand class B and AB differently. I will ask differently. What is the quiescent current of the output...

Any proof it's a true Class-B ? (e.g. output stage idle current)

IVX, don't make excuses ;), distortion is distortion, whatever harmonics are affected. On diya I showed a graph with bypassed caps vs...

SE/UNBAL 1.7Vrms input range, input caps bybassed -> 2.4mA DC flows to the source V1 ( 1mA when input range is 10Vrms) TI...

Not only a higher capacitor value can help, but also the capacitor type and voltage rating. SE measurements, THDvF, 96k 24b, 1.7Vrms...

I already wrote IVX on diyaudio about input capacitor distortion. He claimed that my capacitors are faulty and I should replace them...

I use nothing else than the balanced divider (even for SE), since the beginning. See the green trace in the post no. 1543 above.

PMA, have you tried a balanced divider for the SE output ?

I recommend replacing the 220u/10V capacitors with 470uF/16V (C1 C2 on my schematic). I personally use 1000u/16v, I get much better LF...

"no, Victor's OSC(good for THD but be aware that the OSC's H3 is rising quickly from >4V)" what V ? only Vpp applies to 4 Output voltage...