I just picked up an ABM 500 from the forum (uK manufactured rackmount version). Any advice for settings to get a warm-but-not-gritty overdriven sound for old school blues rock? Obviously I can play around and use my ears ... but there are so many variables in the controls, I thought I would just ask here first for a short cut!
PS, on first play around the overdrive doesn't seem to drive very much at all, but it may be that I need to balance it with input and gain settings?