If you are limited in space or just looking to add some bass to your system, this kit is for you. The Kenwood KSC-SW11 is a compact low profile powered subwoofer system that can be added under car seat, in tight spaces or just in your trunk. This subwoofer is powered, so no need for an external amplifier, it also comes with remote bass control and power and ground wire harness. It's made by Kenwood, so you are getting quality made subwoofer that will last you years! This 150 Watt subwoofer is the perfect system for you if you are looking for that all in one system that is incredibly easy to install. Just wire the subwoofer to your battery, ground it, connect it to your head unit using RCA cables (Wiring Kit not included).