I don't understand this either. I am not a HT man, I have one but it is a stereo one, but how can 2 mono speakers be out of phase with each other? I don't understand how they can be out of phase with the stereo signal either but as I said I am not a HT expert. Three channel sound was current in the early 60s when I got into audio and I had a Fisher amp that had a separate mono output for a 3rd channel. It worked fine then and a modified version should work now.
Two mono center TV speakers out of phase?
I would like to use two mono center speakers with one over, and one under the TV to make the sound image appear to come from the TV, not above or below it. My home theater dealer said that he has talked to experts on the subject who told him not to do that because the sound will be out of phase. To me that makes no sense at all, because the mono signal to both speakers is the same, the two speakers are the same, and the two amps are the same. I would much rather hear the sound coming from the center of the TV, but what would cause the sound to be out of phase, or what other problem would this setup cause? This mono center channel is created from the left and right signals and is not a separate third center channel.