3-Way, Full-Range Enclosed Speaker System, Gloss White, Right-Side (250 W, 4 Ω) This amazing large-format speaker system combines the power of our maximum-performance 10-inch marine subwoofer driver with our 7.7-inch coaxial speaker to deliver true full-range, high-output performance in open-air marine installations. It is ideal for larger vessels and party decks where quality, high-output sound is needed. The enclosure actually consists of two individual chambers. The larger chamber houses the subwoofer and is precisely tuned to deliver outstanding quality sub-bass response in an open-air boat installation. Loaded inside, is our maximum-performance M10W5 10 in. subwoofer driver. The smaller chamber houses our M770-CCX maximum-performance coaxial. This system is designed for a bi-amplified application with an active crossover, where the subwoofer driver is powered by its own amplifier (or channel), with a low-pass filter set at 80 Hz. The coaxial driver needs to be powered by another amplifier channel with a high-pass filter set at 80 Hz. For best results, the subwoofer driver should be powered with an amplifier in the 150-250 W range, while the coaxial driver should be powered with an amplifier in the 75-150 W range.