"Horizontal dispersion with all MTMs is limited by the cancellation caused by the woofers as you move off axis. A 30 degree horizontal window is about all you can expect from a horizontal MTM regardless how well the tweeter disperses its frequencies."
Thank you for this information. I have seen several references in various threads talking about using a TM speaker as the center channel. [In each case I assumed the center channel was upright.] Is this used instead of a horizontal to improve dispersal?
Just before hitting the reply button, I had this picture flash into my mind. If one wanted the 4 ohm/higher sensitivity in the center (but wished to avoid the horizontal cabinet), does it make any sense to create a more or less square cabinet which contains 2 midwoofer drivers on the bottom and 2 tweeters above? (Just curious.)