Compact Box Subwoofer Part Number: MS-55 each 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. Features Dual Voicecoil, high-excursion, 5.25” woofer High density, UV stable enclosure Water resistant Bass-reflex, high-efficiency acoustic design Side vented output ports Compact size and molded-in mounts provide for convenient installation nearly anywhere Acoustically matched for use with Poly-Planar ME-51, MZ-100 and ME-400 amplifiers or can be used with any amplifier 25 - 100 watts Specifications Power Handling: 100 Watt RMS Speaker Impedance: 4 ohm x 2 inputs Frequency Range: 40 Hz - 300 Hz Weight: 8.5 lb (3.8g) Width: 8.85” (225mm) Length: 11.8” (300mm) Height: 4.75” (120mm)