I played a live show a week and a half ago and used the monitor and main out, no problem. Changed absolutely nothing in the meantime, and then went to record a band last night. Monitor out to the cab so he could hear it in the room (live tracking of a six piece bluegrass band, buddy had a gorgeous hand made Weissenborn copy) and when I plugged in the XLR to the main output, the monitor out shut off. I ended up mic'ing the cab with a 57 and it sounded great anyway, but what the heck happened?
Any help would be appreciated.