Polk Audio MM522 5.25" 2-Way Coaxial model, easily handle extreme conditions in car or marine setups. They feature 240 W peak power, a titanium-plated composite woofer cone, a Terylene fabric tweeter, and a Santoprene rubber surround for exceptional performance. Polk's proprietary Dynamic Balance technology ensures distortion-free response with wide sound dispersion by using laser imaging to select optimal materials. These 5.25 speakers arrive with bold grilles and stainless mounting hardware for customized installation, adding style to any vehicle while suiting boating trips for boat owners who want better sound quality. Their IP56 Ultra-Marine rating, waterproof surrounds, composite cone, and lightweight, corrosion-resistant fiberglass-reinforced ABS basket with drainage slots resist harsh elements. 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 powerful marine speakers or a complete audio system for your home, Polk has you covered.