Pioneer TS-WH500A | 8 ¼" HVT Sealed Active Subwoofer

Pioneer comes up with a new entrant in the continuing contest to build the smallest, most effective subwoofer. This subwoofer features a 50-watt amp and two 7"x4" speakers in a seriously small enclosure that'll surprise you with its powerful bass response. The surface area of the two drivers is equivalent to that of an 8-1/4" subwoofer, so it'll move some air.