Hi there,
Out of the bleu: I just made some changes within my little Park G10. (Can we call this ss amp "vintage" junk by now? :wink: )
I replaced the first JRC4558DD (pretty bad sounding) IC with a KA4558.
I ripped the diodes and changed them with red LED's in series with a 68k resistor. Parallel to this resistor I placed back the 1N4148's in. Now there is soft clipping at 1.5V signal and hard beyond 2.1V. Sounds pretty great in comparison to the stock amp!
-----|<|------ //
|-------|<|----------
-----|>|------ // |------
|-------|>|----------
----^^^^----