Configuration: 2 x 18" vented subwooferLow Frequency Transducer: 2 x 850 W, 8 ohm 18" woofer with a 4" voice coil, ceramic magnet assemblyFrequency Response (±3 dB) 1: 37 Hz to 200 Hz (without processing)Frequency Response (-10 dB) 1: 31 Hz to 1 kHz (without processing)Nominal Impedance: 4 ohmsContinuous Power Capacity 2: 1700 WMax Recommended Power: 3000 WSensitivity (1 W at 1 m) 1: 101 dBMaximum Output (SPL at 1 m): Continuous: 133 dB, Peak: 139 dBEnclosure: Cabinet Type: Vented, trapezoidal enclosureMaterial: Baltic birch plywood / 36 mm baffle and side panels; 15 mm top and bottomFinish: Black (WL218-sw-BK) or white (WL218-sw-WT) texture coatGrille: 14 gauge powder coated steelConnectors: Two NL4Pin Outs: Pins: 1+/1- Sub, 2+/2- NCAttachment Points: Integral, adjustable rigging system, vertical splay adjustable in 1° increments from 0° - 10°Weight: 92.5 kg net, 110 kg shippingDimensions (HWD) mm: 541 x 1166 x 882Accessories Available: AF218-sw Array Frame (optional), COVER WL218-sw Soft Cover (optional)