Polk Audio MM1242 12" Single Voice Coil Subwoofer for Car & Marine The PolkM1242 SVC 12" Marine Certified Subwoofer is an outstanding sub for cars & marines designed to easily handle extreme conditions. This subwoofer features 1260W peak power, a titanium-plated composite woofer cone, and a butyl rubber surround that delivers exceptional performance. Polk's proprietary Dynamic Balance technology ensures a distortion-free response with wide sound dispersion. It utilizes laser imaging to identify the best combination of speaker materials. The result is a marine subwoofer that produces a powerful bass response in even the toughest conditions. With IP56 Advanced Ultra-Marine certification, this Polk subwoofer is built to resist corrosion and has waterproof surrounds, composite cone, stainless steel mounting hardware, and ABS basket. Polk's dedication to advanced technology and engineering is evident in its powerful speaker series, smart speakers, soundbars, and more. They strive to bring the best-in-class audio experience to their customers. Whether you are looking for a powerful marine speakers or a complete audio system for your home, Polk has you covered.