[RetroRev]

After a little fiddling with it, adjusting a few components to make sure there were no bridged connections or anything, I now get a very very low frequency hum from the speaker, no matter what I do.

I've been poking at this thing for a good few hours, though and I think it's time to call it a night.

I am exceptionally tempted to just cut everything out and rewire the whole thing from scratch, tbh. Nothing worse than having to go through and check someone else's work. Especially when they're not around to question about it ?