So I'm on the fence on what to do. I am so bummed I can't get 3 cabs running out of this amp when that is the thing it was designed and bought for to do. What gets me is I am using the two GS112's (one of which is new) and they sound great together. I was using one DB112 and one GS112 before and they sounded great. When I put them all together, is when my problem arises. This to me rules out polarity issues. Is it possible that for whatever reason my PARTICULAR amp and cabs don't like this matching, when I see guys one the Aggie website doing exactly what I am in advertisements.