A slightly unusual request for information, perhaps from people with similar situations. I am potentially looking to put a system into a long room (almost 30 foot in length). I have been investigating how best to deal with the side speakers (of a 7.1 system) in such a long room. The speakers I currently have are dipoles. Cinemas have multiple speakers down each side wall, though I suspect that these are direct radiators. I am considering if it is possible, within a domestic situation, to use more than one pair of speakers down the sides. Does anyone use more than one pair of any speaker as the side speakers in their set up? If I was to use more than one pair of dipoles, how do I get around cancellation problems? Am I asking for real trouble on this one, I am not in the position to try this at the moment and I am therefore looking for any experience to guide any test at a later stage.