Upgrade your vehicle's stereo system with JBL Car Audio Powered Subwoofer Enclosure. It features an integrated amplifier to give your music tight and powerful low frequencies. This car stereo subwoofer is compatible with most factory-installed and aftermarket head units. Additionally, the slipstream port is designed to deliver distortion-free performance, even at high levels. With the remote level control, you can adjust the bass volume from the drivers seat.