The VRX928LA is a light-weight, compact, 8", two-way line-array speaker system designed for use in arrays of up to six units. The VRX915S is a compact, high power subwoofer system containing a 2265G-1 neodymium magnet, patented Differential Drive®, 15" woofer in a front-loaded, vented enclosure. Combined with speaker poles, which allow you to easily position your VRX928LA's above the subs, setting up your perfect system is a breeze. Buy them together in this special bundle and save!