I have been wondering whether it would be a good idea to have 2 center channel speakers, one above the TV and one below it. The goal would be to have the sound image coming from the center of the screen. I did a search in this forum and found 1 person saying "bad idea" without any reason given and another person saying "comb filtering between them can be a problem". So, is this just a bad idea? IS comb filtering really a problem? How is this is different than listening to a mono source with 2 speakers? The 2 center channel speakers would be identical, except perhaps for age. If I was to do it, would I hook them up in parallel or series?