Advice on modifications to TDA8932 amplifier.

[Lysergium]

I have built a simple amplifier using the TDA8932 circuit, two bose "twiddlers" (273488004), and a mono guitar jack socket. 24v 2.2A power supply.

I found this page with various modifications done to the board:
http://diybudgetaudio.com/TDA8932.htm

But the information isn't very extensive, no diagrams and circuits, no instructions.

What modifications could i do? he recomends externaly adding power-line decoupling capacitors, i have the exact type he recomends, but doesn't say where to wire them exactly.

He also appears to have caps connected to the input terminals, not sure what that does.

I'm looking for more info on these modifications, names of the techniques/mods, so i could read up more.
exact step by step instructions would be ideal, obviously, if you have the time, but who does these days.
any info, or info sources, are greatly appreciated, thanks.

[PRR]

https://www.diyaudio.com/forums/chip-amps/342962-advice-modifications-tda8932-amplifier.html
https://www.diyaudio.com/forums/class-d/277130-fasten-seat-belts-tda8932-pessimistic-review.html

The interplay between danielwritesbac and CharlieLaub is instructive.