I've been shopping around a lot for a full set of speakers lately and I've noticed that, like a lot of things, once you buy into a set, the remaining pieces that match are quite expensive. In this case, it seems that the cost of a center speaker vs. the cost of same make & model of front L/R speakers is quite high, and the sound quality seems quite a bit lower, especially in the bass response. In every set I've looked at, the centers sounded very hollow compared to the main front speakers. Perhaps centers are intentionally middy? I had this idea last night that I could get two mains and put them on their sides, head to head so that they are aligned just like a center with the tweeters in the middle. This should keep the sound very centered, and it might sound a lot better than a "real" center. Buying four mains seems to only add about 15% - 20% to the total cost of what I would pay for two mains + center. Seems like a worthwhile investment if it sounds significantly better... Is this a crazy idea? A secondary problem, if I were to do this, is impedence. If I hook the two mains in parallel, I've cut the impedence in half, which, depending on the speakers, might go below the minimum spec on my amp. Would there be any significant sound quality degradation with hooking them in series rather than in parallel, effectively doubling the impedence? I might have to boost the center channel to compensate, but would it kill the sound? Thx!