DB TECHNOLOGIES SUB 615 is a 1200W (600W RMS) Class D active sub woofer with 28/56-bit DSP, equipped with a 15" speaker, with a frequency response of 42Hz-124Hz (- 10dB) and Max SPL of 131 dB. The onboard controls are Subwoofer Level, Outputs Mode, Polarity and Subwoofer Mode. DB TECHNOLOGIES SUB 615 is equipped with 2 balanced XLR inputs and 2 balanced XLR outputs. The cabinet is made of Plywood with a metal grid, for a weight of 25.5 kg.