The KAC-M1814 super-compact Max Power 400-Watt 4 Channel Class D Amp will add new clarity and impact to the basic powersports sound system of almost any kind of vehicle on land or water. Marine rated, this 4 channel amp will pump up your audio system with 45 watts RMS per channel¡ªthats more than twice the power of most car stereos or marine receivers! The amp uses plastic covers to protect its connections and features a conformal coated circuit board that keeps out moisture and salt.