JBL VRX918S 18 in. High Power Flying Subwoofer

18 in. High Power Flying Subwoofer. The VRX918S is a compact, high power suspendable subwoofer system containing a 2268H neodymium magnet, patented Differential Drive®, 18" woofer in a front-loaded, vented enclosure. 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