[Wayne A. Pflughaupt]

Hi Steve,

I guess you're starting to see why the "standard protocol" is a single subwoofer, with low pass filtering for the sub and high pass filtering for the mains (i.e., a crossover between them). This allows the sub (or more than one of them) to put in the optimal location for best performance, and you minimize interference from other sources of bass in the room (be it another sub seperately located and/or full-range speakers). That's not to say that other options aren't feasible, but seperated subs, mains running full range, etc. are usually more difficult to properly implement and require much more tweaking - as you know.

Regards,
Wayne