Engineered for real-world marine duty.Weatherproof (IP66 rated) design and construction to withstand the elements. Easy-to-read, high-brightness, 2.8-inch full-color LCD display with separate day/night lighting and display themes. Subwoofer zone outputs equipped with a 500 Hz low-pass crossover. 6-channels of audiophile quality, 4V RMS preamp level outputs from two independent main zones, plus a dedicated subwoofer zone