SUBWOOFER FOR CAR & MARINE - The Polk MM842 SVC 8" Marine Certified Subwoofer is a superior performing sub built to handle some extreme conditions. With 900W peak power, it features a titanium-plated composite woofer cone and butyl rubber surround HIGH-PERFORMANCE CAR AUDIO SETUP – The subwoofer’s heavy-duty spring terminals accept banana plugs, pin connectors, or 10-gauge bare wire, offering versatile connections for 8-inch Polk subwoofer and seamless integration with your car sound system RESONANCE-FREE SOUND CREATION – With Dynamic Balance, a proprietary technology from Polk Audio, this marine subwoofer uses laser imaging to identify the best combination of speaker materials and delivers distortion-free sound with wide dispersion SPLASH-PROOF SOUND SYSTEM – With IP56 Ultra-Marine certification, this marine subwoofer is built for marine audio systems. Its waterproof surrounds, composite cone, stainless steel mounting hardware, and ABS basket resist corrosion POLK'S INNOVATION – With advanced technology and engineering, Polk delivers best-in-class audio through car subwoofers, marine systems, powerful speaker series, smart speakers, and soundbars, letting you sit back and listen with your heart