SSV Works custom molded sub enclosure is designed for a 10″ subwoofer and installs into the open space behind the passenger seat, with some cutting required. Constructed of 100% fiberglass for the best sound quality and bass response. Finished in a black texture coat to match Yamaha textures and can be custom painted to match your color scheme. – Includes stainless mounting hardware and step-by-step installation instructions. NOTE: requires external amplifier.