This is a nice quality Aiwa TS-W35U Subwoofer. It features an impedance of 8 ohms.
Compact Box SubwooferPart Number: MS-55 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...
Coustic subwoofers are designed to deliver high performance power at an unbeatable price. Polypropylene cone with excellent stiffness to weight ratio allows for high efficiency and high SPL. Large foam surround increases efficiency by further reducing weight. The all new Coustic subwoofers offer a solution for any enthusiast at an extreme value.