I've been thinking about some options for building a complete set of HT speakers, and have been a little confused with respects to the design of the center channel. I was looking around and I found this link that tells us that MTMs are bad for centers (of course they push their own design). Is there any merit to what they are saying? What is the worst possible way to design a center channel speaker - a way that practically ensures hard-to-understand vocals in a speaker whose main job is to render vocals intelligibly? Well, you could design a speaker like most of today’s commercial center channel speakers, with two woofers located on opposite sides of the enclosure and a tweeter centered between them. Yet when I look at a majority of center speaker designs, they are exactly that. Essentially an MTM on its side. I know there might be issues with phase cancellations. How far apart or close together do two woofers need to be to minimize any adverse affects from putting them side by side? To give you guys an idea of what I was thinking, I am currently planning on making three identical MTM speakers, one each for L, C, R (all shielded). The other 4 would be TM arrangements with the same drivers. What would be the drawbacks to something like this? My listening would probably be 90/10 movies/music. thanks EDIT: OK I figured out the frequency/distance calculation to determine at what frequency the two speakers begin to interfere. If interference begins at about 1200hz and the crossover is at 2500hz, how big of an impact is this really going to be? Isn't this also an issue with regular tower MTMs? What is the difference?