The Denon AVR-4802 allows connecting two pairs of side surrounds. When both pairs A+B are used, do you lose the back speakers or can it really drive nine speakers simultaneously? My room does not work well with dipoles, but will the Denon allow me to experiment with two pairs of monopoles for the sides to get a similar diffuse sound? The room is roughly 15 feet wide by 22 feet deep with 8 foor ceilings and the listener in the center. I am considering the ARV-4802 with one or two pairs of Paradigm Studio/20s for the sides along with a pair in the back.