With 2 channels and a 400 Watt peak power output, the MS-AM402 will drive up to two subwoofers, an extra pair of speakers, or even 4 speakers (2 speakers in parallel each channel at 2 Ohms) to spread the sound around your vessel. Incorporating heat-tempered and conformal coated PCBs for maximum product life, and gold-plated connectors for improved signal flow, the MS-AM402 reproduces clean and powerful audio with enough power to rock the boat.