The higher end Denon receivers allow two pairs of side surround speakers (using one amp per side). This allows using dipoles for movies and monopoles for music. My irregular side walls do not allow Paradigm ADP dipoles so I am considering using two Studio 20s on each side, wired out of phase. This allows more flexibility in their placement. Is anyone driving two pairs of side surrounds simultaneously from their Denon receiver? The receiver will also be driving Studio 100 fronts, CC center and a pair of Studio 20 rears. I will switch the fronts to a separate amp eventually, but will the receiver be able to handle driving nine speakers with seven amps. How far down does the impedance of the Studio 20 dip, assuming crossed over at 80Hz and would two of them on one amp cause a problem? Would the 5803 handle this much better than the 4802?