Garmin 010-01969-00 Signature Series 4 Channel Marine AmplifierSignature Series Marine amplifiers are designed and engineered for the harsh Marine environment A high efficiency 1400 Watt amplifier design which ensures low battery drain with a high output This delivers increased power to the connected speakers and or subwoofers, extending your audio entertainment experience to a whole new level 1 piece heavy duty die cast chassis, 5 way circuitry protection thermal reversed power polarity DC offset protection high