Designed and built to greatly exceed industry standards for salt-fog and UV exposure. Corrosion and UV-resistant materials used throughout. Outstanding sound quality acoustically engineered to deliver powerful, clean sound in open-air boat environments. 0.75-inch silk dome tweeters deliver sparkling high frequency detail. Long excursion, high-efficiency woofer design delivers impressive bass energy and clean mid-range. High power handling designed to benefit from operation with quality amplifiers up to 125W per channel. Can also be operated with head unit power, if necessary.