I've got a 4.1 component system with two Kenwood 18's upfront and two Sony surounds in the back with a powered Sub Woofer. It is very loud. Mind you, i live in an apartment where my neighbors dont mind the loud acoustics. I've never had my reciver's volume past half way. At half, the glasses at the bar of the restaraunt below me start to rattle and fall off the shelf.
Gaz, your system must sound like **** with all thoes speakers. Unless of course, you've got a huge amphitheater in your home to house them in. Remeber, that there is such a thing as too many speakers.
Anyway, Thats a gem of a woofer. I've allways wanted a Ginormous Sub to drop in the bed of a pick-up up. Hook up some hydraulics so the truck can "Dance" and go tear up the strip.