The 150 W (600 W peak) Control 50S/T subwoofer contains a high-power, long-excursion 200 mm (8") driver which features an extremely robust high-mass cone for extended low-frequency response, a 38 mm (1.5") 4-layer copper voice coil for high motor strength, an aluminum former for good transient response, and a rubber half-roll surround for enhanced bass performance.