As all in one solutions go, you simply can't beat the A100 Amplified Bass Tubes by Bazooka. Designed to be a simple-to-install, yet effective upgrade to your car's existing mobile audio system, the A100 Bass Tubes feature a 100 watt, 2-channel amplifier built right in, coupled to a dual voice coil woofer. Since the amplifier has a built in crossover to remove the high frequencies the woofer cannot play from the signal, you get exactly what you need in the A100's - crisp, clean bass and nothing more. When connected to your system, the end result is seamless integration, both electrically and audibly, yielding sound quality your factory auto sound system simply can't touch. The BTA6100 features a 6 inch dual voice coil subwoofer, and fits in places most subs can't. The 6 inch works great behind the seat of small trucks, the trunks of sedans or hatchbacks. Simply point it into the rear corner to take advantage of the Bass Tubes Enclosure, and you're rocking in no time.