i have a yamaha rx-v450 which is 6.1-able. im thinking of getting something for the rear channel. i was looking at a pair (unfortunately dont sell singles) of wharfedale WH2 surrounds to use as a rear surround, as i have wharfedale fronts/surrounds/center.. could i wire both of the WH2's (which i'd probably wall mount one above the other) into the single surround rear in the back of the yamaha? (and not screw my reciever up in the process) edit: actually would it be worth adding that extra speaker if my sofa was right up against the wall? would mounting it higher make any difference?