Hi All. I currently play on a Trace Elliot AH-500-7 through a 4ohm 4x10 cabinet. I want more low end and want to increase the size of my rig and want to incorporate another cabinet. I know I can't just go out and buy any old cabinet as the OHM issue comes into play. is there a way to add a cabinet to my stack without having to replace both to achieve 4 ohm? i am a bit confused on what my options are. i want another 4x10 cab or a 15 to add to my stack to fill out my sound but am stuck at this crossroad. any and all help is appreciated!!!