Long story short... I had dog-zilla roll through my area and she ripped out a channel from the back of the sub it was actively powering.
So, each channel was running a different sub... Channel 2 (the one my dog ripped out) now basically says it's clipping constantly, red light sorta flickers but it's nearly solid. EXTREMELY limited output, it's 95% distortion on that channel... but I can barely hear some of the content. I'm not sure if it's useful info, however it was banana plugs she yanked out, and they were resting on each other when I went to have a look.
Channel 1 is A-OK, nothing wrong with it.
I've been reading for a bit and I'm still nearly illiterate when it comes to understanding how the components of an amplifier actually work, I don't own any testing gear and advice so far has been to not bother fixing it from a friend.
But I'm happy to tinker and I don't mind buying some testing gear if it's not too much...
Any idea's on where to start or if I should even bother???