JL Audios enclosed subwoofer system is all about the bass. This low-frequency subwoofer reproduces and emphasizes deep bass notes that are usually lacking in main speaker systems. JL Audio engineered the M-Series subwoofer system as the reference standard for marine subwoofer performance. This subwoofer allows your amplifier and main speakers to work with less distortion while maintaining the full-range sound spectrum. Adding this subwoofer to your system produces staggering amounts of jaw-dropping bass but if you want to listen to your music at a lower volume, this subwoofer allows you to still hear every note, instrument or voice clearly. Built to withstand marine environments and ready to install in your boat, this subwoofer features an all-fiberglass enclosure with a gel-coat finish. Designed to deliver high-quality sub-bass response in open-air environments, it is loaded with the M10W5 10-inch subwoofer drive. Optimized to operate with a large volume of air behind it, it is best used with a 75W-250W amplifier (sold separately). Key Features Rock-solid, all-fiberglass enclosure construction Infinite-baffle use Enclosure not drilled for speaker cable Reduced distortion and improved performance Very long linear excursion, DMA-optimized motor systems result in superior output with reduced distortion Vented motor design with marine-grade, stainless steel rear diffuser plate Injection-molded mica-filled polypropylene cone bodies with synthetic rubber surrounds, specifically formulated for marine duty Marine-grade, synthetic fiber spider with progressive roll design Specifically engineered Centrex polymer baskets are corrosion and UV-resistant and encapsulate the motor system to prevent corrosion Gold-plated, marine-grade brass connection terminals