Is the first 5-channel Class D Hi-Fi Marine amplifier, the key feature of a Class D amplifier is low battery consumption while maintaining high power. The MS-DA51600 amplifier is perfect for the marine environment by having a PCB compliant coating for maximum product life and performance, plus the amplifier's stainless steel chassis acts as a heat sink, reducing the internal temperature of the components and increasing efficiency. Amplifier type: 5 channelsRMS power 4 Ohm: 4x80 + 1x250 WattRMS power 2 Ohm: 4x130 + 1x330 Watt