Frank, this may be an example of why I don't care for horizontal MTM centers. As another experiment(besides using the "phantom" center), set it on its end in a vertical orientation to see if this significantly improves the horizontal dispersion. If not, or if that positioning isn't acceptable for permanent use(even below the screen), then simply increasing the volume of the center channel by 2-3db may help. Of course, you shouldn't do anything which would reduce your enjoyment in the preferred center position which is yours by right.
