Kenwood's KSC-SW11 Powered subwoofer might look small, but it delivers impressive bass. This little powerhouse will fit under a seat in most vehicles, where it'll produce low-frequency response equal to that of a larger subwoofer in your trunk.
It offers a great solution for those who want to reinforce the bass in their system without taking up a lot of space (Space Saving).
compact powered subwoofer
aluminum enclosure with 8-1/4" x 5-1/8" sub
built-in amplifier: 75 watts RMS power (150 watts maximum)