DAS Audio Action-S218, Passive Bass Reflex Subwoofer, Drivers: 2x 18"" woofers, Power rating: 1200 W RMS / 4800 W peak, Frequency range: 29 - 160 Hz, Maximum output level: 139 dB, Impedance: 4 Ohm, Connections: Speaker twist, 35 mm Speaker flange, Dimensions (H x W x D): 1070 x 545 x 675 mm, Weight: 61 kg, Colour: Black