If you are limited in space or just looking to add some bass to your system, this kit is for you. The EDIFIER SW 8 underseat subwoofer is a compact low profile powered subwoofer system that can be added under car seat, in tight spaces or just in your trunk. The EDIFIER SW 8 underseat subwoofer comes with two units  8" subwoofer and a 2 x 100w output amplifier, which will give you more power than any underseat subwoofer out there.