the only thing I can think of would be to change the cabinet's jack so instead of all it's options, the 2 jack spots would be wired identicle so you could run either or. I'm not sure, but you would probably have to rig something to keep both channels from being able to run at the same time (not sure how that would affect the ohm's). Besides that you could get 2-2x12 cabinets, but you just can't beet a Marshall 1960A cab. I know, I've got one too.