The BassPro SL2 self-powered subwoofer fits under the front seat of many vehicles, and adds deep full rich bass to your existing audio system. Its shallow-profile, 8" woofer is coupled with a custom tuned enclosure and is driven by a powerful Class D digital amplifier which making it a powerful solution. A fully variable crossover and Bass EQ are on-board to tune the BassPro SL2 to your system