QSC AD-S112-sw AcousticDesign? is a low impedance, surface mounted, 12? direct radiating subwoofer. An ideal companion to AcousticDesign? full range models, the AD-S112sw allows impressive low frequency expression within a complimenting form factor, suitable of demanding foreground and background sound reinforcement applications. AcousticDesign? series offers integrators a premium quality installed sound solution where performance, coverage, and aesthetics are paramount. Combined with unprecedented ease-of-installation and high weather resistance, the AcousticDesign? series provides integrators a versatile and confident install solution.