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1 - Horizontal centers were developed primarily for 'ergonomics' and provide good horizontal sound dispersion (but not necessarily good vertical dispersion)

A vertical center gives better horizontal dispersion because the tweeters are not interfering with each other in the horizontal plane.

A horizontal center is good enough for most folks, just not the 'HT obsessed'.

Fred

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Blujays1: Spending Fred's money one bottle at a time, no two... Oh crap!