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 that 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 that your factory system simply can"t touch, Eight-inch bass tube with on-board 100-Watt 2-channel amplifier, Eight-inch dual voice coil subwoofer, Patented tube enclosure design is optimized for "Corner Loading " for maximum bass performance, Includes straps for secure mounting, One-year limited warranty, Dimensions: 24" x 10, 4" x 10, 2", SKU: PEBZKBTA8100