Upgrade your watercraft's sound system with the SoundStream MR4.1400D Rubicon Nano Marine 1400 Watt Class D 4 Channel Amplifier. This marine-grade 4-channel high-efficiency class D amplifier processes your boat's speaker system to provide the ultimate music experience. The hybrid aluminum alloy heatsink system allows optimum dissipation and provides added safety for a worry-free experience on the water. The dual system impedance of 2 ohms in stereo mode and 4 ohms in bridge class d full range modes creates a full and vibrant range of sound. Featuring a soft start turn-on, LED power and protect indicators, and 3-way protection circuitry, you can rest assured this amplifier will last year after year. The metal-oxide-semiconductor field-effect transistor power supply adds durability, and the audiophile-grade infrared thermal mapper transistors will make any music sound crystal clear. Containing a military-grade surface mount technology printed-circuit-board, this amplifier maintains dynamic and long-lasting system performance. Input sensitivity levels of 200mV-6V for both high and low frequencies and channel separation of 12 decimals create rich, distinct sounds. Enjoy your music and audio as clearly on open waters with the Rubicon Nano Marine 1400 Watt Class D 4 Channel Amplifier from SoundStream.