PA SUBWOOFER (SELF-POWERED) SONAR 115 Sub D is a powerful state-of-the-art self-powered subwoofer for extending the bass response of full-range SONAR models, but also many other types of loudspeakers. The 15'' high-performance woofer, 1500-watt power amplifier, and meticulous HK Audio acoustic engineering ensure an incredibly powerful bass experience. SONAR 115 Sub D offers: 15'' high-performance woofer, 1500-watt peak power, 24-bit DSP electronics, LCD screen with dimming function, Clear menu control of parameters such as Bass Boost, X-Over, Polarity, Delay, Mode for operation with SONAR mid/high units, CARDIOID FRONT and CARDIOID REAR presets for easy Cardioid operation, HK Audio MultiGrip handles, 2 input channels and 2 output channels, M20 pole mount adapter, Sturdy wooden cabinet, Metal grille front backed with black acoustic foam, Equipped for fitting transport rollers, 5-year manufacturer warranty after registration.