Dan, it might be a fair idea, and some of our members(e.g., Mike Drew)use 2 vertical M22s separated horizontally for a center channel(agree that above/below would be preferable). What this amounts to is a tighter version of a "phantom center" using the mains. The material is anchored to the center of the screen for those sitting in the center, but will shift a little for an off-center listener, but not farther out than the speaker on that edge of the screen. If positioned above/below there's no horizontal image shift.


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Enjoy the music, not the equipment.