Are you having to turn gain and master to full in order to get a decent level of volume through your cabinet? The first time I owned an ABM 500, back in the day, I put it through a 1x15 cab that wasn't very efficient. This mean I couldn't get loud enough to play with a loud drummer and a loud guitarist without putting the needle way into the red (gain and master maxed). The reason was, that my cab just wasn't efficient enough (it was a TC Electronic 2x10).
I ended up selling the ABM and buying a TC Electronic head.
A few later I bought a Barefaced Compact 1x15 and recently I bought a secondhand ABM 500. I tried it with the Barefaced and because the cab is so efficient I no longer had the same problem.
What cab are you putting your amp through?
Hi, I think I’ve got the hang of it now. I’ve stopped using the compressor & have lowered the input volume & turned up the output volume.
I’m using a Barefaced 210 which now sounds great.
The VU meter isn’t moving much now, which is reassuring.
I think I was going wrong because I was copying other peoples settings on this thread.
They are great amps, definitely worth persevering with.