QSC AD-S.SUB AcousticDesign 6.5-Inch Surface Mount Subwoofer | Color: WhiteThe QSC AD S. SUB 6. 5 Inch Surface Mount Subwoofer is ideally suited for background music applications that require depth and clarity at lower volume settings. Experience deep, clear audio even at lower volumes. The AD S. SUB from QSCs AcousticDesign series is ideal in foreground and background sound reinforcement situations utilizing 70 100V or 16 bypass configurations. The AD S. SUB features a 6. 5" weather treated paper cone woofer on a dual voice