The integrated and easy-to-use digital signal processor (DSP) allows you to customize the subwoofer for a number of applications including Mo'Bass, FOH, Cardioid, and Endfire presets. The cardioid and endfire presets allow for off axis rejection and a uniform bass response throughout the room. Additionally, the variable low pass filter and variable alignment delay functions allow you properly dial in your subs with any available tops. The Air18S ships with a power cord and a caster kit.