JBL VRX918S Style Flying Subwoofer/Line Array Features: Integral rigging hardware for simple connection of VRX932LA line-arrays and optional array frame. 18 inch, 2268H Differential Drive? Woofer for extended low-frequency output Large port area for reduced distortion 20 mm threaded pole socket for solid, secure satellite speaker mounting System Maximum SPL: 130 dB SPL peak System Sensitivity: 95 dB SPL Nominal Impedance: 8 ohms Net Weight: 37 kg (81 lb)

