I spoke to someone at a reputable HiFi store about getting a speaker(s) for my centre rear. My setup is a Denon 2802 6.1 amp with M72 speaker package (M7DS dipole rears, M7C1 front centre, M72 fronts). I thought I should get another pair of M7DS for the centre-rears to match the existing surrounds, and conect them in either series or parallel because my amp only has one output for rear centre instead of two. But the guy said it could bugger up my amp because of unmatched impedences, etc, if I try to connect two speakers to a single speaker output. He suggested utilising my M7C1 to the rear-centre and buying M7C2 to replace he front-centre. How would this setup sound with a single (but wide) rear centre speaker? And will the new M7C2 be tonically matched with my M72 fronts? Thanks.