KRK S12G4, Active studio subwoofer@+, 12"" Kevlar composite woofer, 220-watt, class D amplifier, Frequency range: 26 - 97 Hz, Max. SPL: 119.9 dB, SNR: 92 dB, Adjustable crossover frequency, Bypass function via optional footswitch, Switches for standby function, ground/lift, polarity, and input sensitivity, Two line inputs/outputs: XLR, 6.3 mm jack, and cinch, Footswitch input: 6.3 mm jack, Integrated power supply (100 - 240 V AC), MDF housing, Dimensions (W x H x D): 606 x 416 x 365 mm, Weight: 28.3 kg