Warning, Technical Post Many people will argue that a dedicated centre speaker is a waste of time, since it will not tonally match with the L&R speakers, causing panned sounds to change as they go across the front soundstage. This is all acceptable where the centre uses different drivers and has a radically different enclosure to the L&R pair. However where the centre speaker uses identical dirvers and has a similar internal volume WRT to a pair of small floorstanders/large bookshelf speakers, there are good reasons for using a dedicated centre. For example, most centres are designed with a Mid-Tweeter-Mid configuration. In a vertical axis this design is used to control interactions with the floor and ceiling, and to give a wide horizontal dispersion. So, rotating this arrangement controls horizontal dispersion and gives a wide vertical dispersion. A lot of advocates of the identical LCR designs claim this is simply because manufacturers attempt to get as much sound out of their centres as possible in order to make them match the LRs in efficiency. However, there are some extremely good reasons for having good vertical dispersion and weak horizontal dispersion. Many Centres are placed out of axis with the left and right speakers. Often this disparity can be enough to radically affect the sound of the centre compared to stereo pair - because your head is out of the normal dispersion pattern for the centre. This can be even more important where a large front projection system is used, because the centre speaker is often sited several feet above or below the axis of the other speakers. Secondly, where the stereo pair are close together, the centre's bass output will interact with the stereo pair unless the output is controlled somehow. With a wide enough front soundstage this is less of an issue, but without this the imaging across the front can be greatly compromised if all 3 speakers are too close together. Any opinions?