Bose SUB1, Active Bass Module, Suitable for use with virtually all portable PA systems, Includes a 7"" × 13"" high-excursion RaceTrack driver, The unique shape of the driver allows for a slimmer housing without compromising sound quality, Pairs seamlessly with the Bose L1 Pro32 portable line array via the proprietary SubMatch connectivity, which delivers both power and audio over a single cable, Up to 2 active bass modules can be connected to one L1 Pro32, 2 Subwoofers can be placed on top of each other for an even more powerful bass, Cardioid Mode steers the bass out front and decreases feedback, Pair with other active speakers via the line input and output with selectable crossover modes, Integrated threaded pole mount for use with the Bose S1 Pro PA and other speaker models, Lowest frequency: 40 Hz, Amplification: Class D, Power: 480 W, Dimensions (H × W × D): 53.0 × 25.0 × 53.0 cm, Weight: 16.1 kg, Includes a cover