I have seen some subwoofer designs that use three 8" woofers on the bottom rather than one larger heavier driver. I know this is intended to respond quicker than a big 12", but do 3 drivers really improve all that much over a 12-incher? Or is this just a gimmick? I know Bose (eww) has a new transmission line triple 5.25" Acoustimass bass-module that uses high-excursion 5.25" woofers. Maybe the surface area of the 3 5.25" drivers equals up to that of an 8" or 10".