The MS-55 subwoofer is a compact, high efficiency bass enclosure optimized for marine applications. It’s small size enables it to be easily mounted below seats, under the gunwale area, behind the instrument panel, or any convenient location. The MS-55 is a self contained bass unit requiring no cutting of panels or holes in the boat interior. It produces solid, deep bass extending down to 40Hz and is the perfect addition to any audio system. The ME-51 is a compact 2-channel 50-watt audio amplifier. This compact unit, waterproof design allows for flexible mounting possibilities, and makes it simple to expand the audio system capabilities for any vehicle..