Thanks for the advice Ian. I've already built the 4 pis, and my goal has been to have some remotely transportable speakers. I have a sedan, so moving the monstrous 18" subs Wayne suggests, would be rather challenging. I of course, enjoy giant speakers, but if you recommend the VMPS, that puts one step closer to buying the kit. I already own a pair of VMPS Tower II speakers though, and have had a very challenging time tuning them for good response. Have you had similar troubles with the Larger Subwoofer?
Phil