I have 4 amps which I've just tested and there seem to be some issues with all of them, which I think are related to the Bus1/Bus2/Line In selector switches for each channel. I don't need them so haven't bothered investigating further.
Anybody want them?
They weigh around 15Kg each so I won't post them. Collection only West Sussex or potentially a meet up if I'm around the country.
DM me if you're interested.