With my Denon 2802 even though it has pre-outs for 7.1 can I somehow wire my rear center surrounds to a 4ohm load or to a 16 ohm load. I have a great deal on another pair of S-26's that I can't pass up. Will running a pair of rear centers drain power from the rest of the channels? Any advice is appreciated. I do not know if my old Technics receiver would blend in for the rears if I would go the pre-out way. Thanks!