-The ESB 1.10SD subwoofer delivers powerful bass in a compact design with an ultra-slim profile and 500 Watts of maximum power. Its unique motor structure and 40.5 Oz ferrite magnet ensure exceptional performance, while the polystyrene cone and long throw rubber surround maximize bass. The subwoofer is optimized for sealed boxes of 21 liters and has a depth of only 95 mm.