I currently have an Ampeg 15e. I sold my 4 pro and 410he because I wasn't playing music, but now I'm back and I need an amp. I've been on the fence about what type of set up to get, but I know the basis of my rig will be the 15, since I already own it. I was thinking about pairing it with another 15e/410he and going back with a 4pro. I'm still on the fence with this one, but my two questions are these. If I get another 4pro, will I kill the 15e while using one side of the amp? If I get another 4pro and another 15, will I be able to run it in mono bridged w/o killing the cabs?