I just bought an Ampeg SVT-4 Pro from a pawn shop nearby. It came with the road case, Korg Tuner, and Furman equalizer for $650 out the door. It seemed like a good deal, so I went for it having only been able to test each channel independently through some crappy cab they had there at the store. They both produced sound, which was all I was really familiar with how to test anyway. I know I need to test the mono/bridge output, so I was going to take it over to GC if need be. But, my question is for everyone, what tests outside of the mono/bridge output would you test? This amp is unfamiliar territory for me and I just want to make sure that what I have here in my possession is exactly what it's supposed to be. I only ask this because the pawn shop gave me two days to test it, and if I'm not satisfied, I can still return it. Thanks!