Hello everyone! So I'm extremely new into the electronics world, I have a basic knowledge of Ohm's Law and soldering. I inherited a Peavey Rage 158 (schematic attached) and I would like to alter it a little to sort of get started playing with things. I've searched google on this topic but all modifications suggested are for models that have a 4558 Op-Amp, as you can see in the schematic this model does not posses such technology. So any suggestions or information on what I can do apart from changing the speaker would be helpful.
Thank you!