I am currently using a pair of BS-22's as surrounds with my Philharmonic 2's in my "theater". Since rears and fronts seldom handle the same content, they sound fine to me. I don't notice any issue with the rear channels. I have also tried to use a BS-22 ( I have two pairs) as a center and it sounds terrible compared to the Philharmonics. Phantom, while not perfect, sounds much, much better to me than a BS-22 in front. I just might end up buying another DM speaker because a fairly neutral center for $90 is impossible to beat and truly insane - especially if it matches better than my BS-22.