The JBL SRX910LA is a two-way active line array element that can cover a variety of mid to large-sized applications, including rental houses, touring artists, DJs, and installations. The JBL SRX928S is a dual 18-inch active subwoofer designed to complement SRX900 full-range sound reinforcement systems. This specially priced bundle combines four SRX910LA speakers, a SRX928S Subwoofer, and a SRX910LA Base Plate for the ultimate ground stack sound reinforcement solution. Buy together and save!