The 6000M''s contain dual 6-inch mid-woofers and a 1-inch CMMD™ edge-driven dome tweeter and are encased in an injection-molded polymer resistant to UV rays, salt and water damage. Precision-engineered to deliver high-output sound (90dB) to a distance of 50 feet, this speaker system is perfect for wakeboarding, waterskiing, tubing or even lakeside entertainment.