Free Express Shipping! Yamaha DXS15mkII Powered Subwoofer (Black) High-Efficiency 1020W Class-D Amplifier, 15" Woofer, 2.5" Voice Coil Magnets, Band-Pass Type Enclosure, Durable, Portable, and Road-Ready, Rugged Polyurea Coating for Protection, D-XSUB...