SW-D4000 is a 12 inch DSP active subwoofer, with 800 watts RMS and over 3500 watts peak power to fill a room with deep bass. It has built-in Bluetooth connectivity and supports Tonewinner subwoofer App to adjust the parameters including the gain, phase and listening modes. It has an XLR input, a RCA input and a subwoofer output. The solid MDF cabinet, LCD display screen, touch control buttons and wireless software upgrade lead you to a more user friendly bass experience.