Package Includes: (1) Rockville SS8P 400-Watt Slim Under-Seat Active Powered Car/Truck Subwoofer Sub, (1) Rockville RWK10 10 Gauge Amp Installation Kit ANL Fuse Holder 100% Copper RCA Compact Power with Deep Bass: 400W peak / 100W RMS output in a slim 2.8" enclosure for powerful, clear bass that fits easily under car or truck seats. Advanced Controls: Adjustable low-pass filter (50Hz–150Hz), phase switch (0°/180°), subsonic filter (20Hz), and bass boost (0–12dB @45Hz) for fine-tuned sound performance. High-Quality Design: Cast aluminum enclosure stays cool; 4Ω impedance, frequency response 20–150Hz, SNR >90dB, sensitivity 90dB @1W/1m; single 15A fuse for dependable power. Premium Wiring Kit: RWK10 includes 100% copper RCA cables and 10-gauge SuperFlex power wire with low resistance for efficient current flow and clean, distortion-free audio. Upgrade your car or truck audio system with the Rockville SS8P 400-Watt Slim Under-Seat Powered Subwoofer and RWK10 Amp Installation Kit. This compact powerhouse delivers deep, accurate bass without taking up valuable space, making it ideal for vehicles with limited room. The SS8P features a built-in amplifier, providing 400 watts peak and 100 watts RMS of clean power. Its cast aluminum enclosure stays cool while producing consistent performance. Fine-tune your sound with adjustable low-pass filter (50Hz–150Hz), bass boost (0–12dB @45Hz), phase switch (0°/180°), and subsonic filter (20Hz) for optimal clarity and control. With 4Ω impedance, frequency response of 20–150Hz, signal-to-noise ratio over 90dB, and sensitivity of 90dB @1W/1m, this subwoofer delivers powerful low-end performance in a slim 2.8" profile. The included Rockville RWK10 10-Gauge Amp Installation Kit ensures reliable connections with 100% copper RCA cables, low-resistance power wiring, and a durable PVC jacket that withstands extreme temperatures from -40°F to 220°F. A single 15A fuse and complete set of accessories make installation straightforward and secure. Perfect for drivers who want big bass in a compact form, this Rockville bundle combines efficient installation, durable construction, and exceptional sound quality—turning every drive into a rich, bass-filled experience.