Key Specifications & Features Driver: Single 5.25-inch woofer housed in a medium-density fiberboard (MDF) cabinet. Function: Acts as a central hub; it receives a multi-channel audio input from your receiver and distributes power to the satellite speakers. Compatibility: Requires a 5.1-channel AV receiver (rated from 10W to 200W per channel at 8 Ohms). Safety Recall Notice: Note that Bose issued a voluntary recall for bass modules manufactured before April 1, 2006, due to potential fire hazards. Bose acoustimass 6 series iii Subwoofer Bose Dual cube speakers with Pioneer VSX-D712S Amplifier home theater