The XSW-8 subwoofer is a compact front firing bass module designed to enhance bass performance and perfectly completes the Spectrum’s 5.1 packaged system. Also using a sealed enclosure for ultimate low-end power, the XSW-8 uses a 200 mm bass only driver and a 90 watt integral amplifier to produce low-end frequencies down to 31Hz. The impressive features list also includes volume level, phase switching and variable crossover.