Well, as I've been using the 6.1 system with only one surround back, is there a big benefit to using dual surround back channels? And would it still be beneficial if I hooked up my dual surround backs by splitting the wire from a single? like from the receiver to positive on one, negative on the other and then connecting the two that way? Is this a good set-up? Or would it be more beneficial just to go with a single surround back? Thanks for any info you can give in advance!