Make Your Drivers Seat the Best Seat In The House. 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. Features and Benefits Proprietary, shallow-profile woofer - The 8" (200mm) woofer in the BassPro SL2 is designed specifically to provide low distortion and great bass performance in an ABS enclosure with a remarkably compact footprint. Efficient Class D Amplifier - The amp that powers the BassPro SL2 produces minimal heat and it doesn't require a lot of current from the car's electrical system.  Intelligent Electronic Design - The BassPro SL2 employs high-pass filters and limiters that deliver exceptional at-the-limits performance. Crossover Co