The 150 Watt (600 Watt peak) Control 50S/T subwoofer contains a high-power, long-excursion, 200 mm (8 inch) driver which features an extremely robust high-mass cone for extended low frequency response, a 38 mm (1.5 in) 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.