The VRX932LA-1 is a light-weight, compact, 12", two-way line-array speaker system designed for use in arrays of up to six units. The VRX918S is a compact, high power subwoofer system containing a 2268H neodymium magnet, patented Differential Drive®, 18" woofer in a front-loaded, vented enclosure. Combined with speaker poles, which allow you to easily position your VRX932LA-1's above the subs, setting up your perfect system is a breeze. Buy them together in this special bundle and save!