The Alpine PWE-S8 is one of the most popular compact powered subwoofers for customers wanting noticeable bass improvement without sacrificing cargo or seating space. Its shallow cast-metal enclosure and built-in amplifier make it ideal for under-seat truck installs, Jeeps, sedans, and OEM integration systems. Key Features 8-inch high-excursion subwoofer Built-in Class D amplifier 120W RMS / 240W peak power Compact sealed enclosure Cast metal housing for durability RCA & speaker-level inputs Auto-sensing high-level inputs Adjustable low-pass crossover Adjustable gain & phase controls Wired remote bass knob included Easy under-seat installation Performance Specifications RMS Power: 120 watts Peak Power: 240 watts Frequency response: 25Hz–152Hz Low-pass crossover: 50Hz–150Hz Dimensions: 13.5" W 9" H 3" D (max depth) Built-in amplifier included Best Applications Under-seat truck installs Jeep Wrangler systems OEM radio bass upgrades Small SUVs & sedans Customers wanting tighter musical bass instead of huge SPL systems Space-limited installs