Soundhound,

I have heard from others in Audio Circle forum (for VMPS speakers which are what I have) that advocates stereo subs as well. I am thinking that I will eventually go two when finance and room logistics can be worked out with the wife factor thrown in.

My home theater is totally separate from 2 channel music room and this sub is for music only. My plan is to run 2 main speakers with one subwoofer at the moment. This is a VMPS Larger sub which has 1 12"driver, 1 15"driver and a slot loaded 15" passive radiator. Since each driver can be driven separately I was going to input left channel to one and right to the other. I am not sure how the 2 drivers, which are side by side, will interact with signal time delays. At the moment I am placing the sub next to the left speaker -- logistics prohibit me from placing it in the center. I am hoping that crossing the sub at 50Hz will really delocalize it.
Two 10" woofers on the mains are doing the mid bass duty crossed at 200Hz and 50Hz (4th order). Higher than 200Hz are covered by tweeters and mids with internal passive crossover between them. I plan to experiment with location, driving method (summed or separate) and cross over frequencies for optimal sound. I suspect I will eventually get a second subwoofer, but I am running out of room. I will need to move to a bigger house if I want to keep putting more stuff in the music room. Perhaps I should go for quadraphonic sub?