Simple mosFET amplifier

We use graphs to reason, but what do they mean?
pwr vs thd symphony 1diffet.png


thd vs freq symphony 1diffet.png
 
Looks similar to a Blameless design. Any reason you’re not going with a current mirror on the LTP? That usually decreases the THD dramatically. But it also increases your OLG, so you’ll probably need to fit a Miller capacitor.
 
Your worries are quite justified and you started thinking about how it works, the board measures 100mmx100mm , the mosfets arent offboard nor are they connected by long leads. Any fix with alternate devices is also surprisingly simple, a low pass filter at say 1Mhz at the VAS section, for the mate using EF3 we cannot omit this filter https://www.pcbway.com/project/shareproject/Pot_luck_amplifier_09c74fc8.html. The mosfets and bias used give us the characteristic we want. , this amplifier configuration is quite simple and robust and surprising for its good performance.
 
You still haven't explained why the lack of Miller compensation makes in better and in what way. Better bandwidth? Here's my very simple go-to design. No-frills, just basic common sense, totally not fancy in any way. But I get 700kHz bandwidth and 0.0005% THD @ 150W (in simulations, lower than I can measure in the physical version) and LOADS of phase margin. Why teether on the edge of oscillation and self destruction? Why increase the THD by degrading the OLG? I'm a bit new to this, but I don't get it.

If you claim your amplifier is "up there with the best" as you do on PCBWAY, you need to back it up.
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