DB Drive E5 BE is a digital bass enhancer that accurately recreates and injects low-frequency information back into the signal path, giving more bass impact. It has a unique equalization circuit that contours the restored bass to your speaker systems, and a dash mount remote control that allows you to enjoy the effects without leaving the driver's seat. The E5 BE also has a PFM subsonic filter switch that can help you clean up your bass response and a bass output control circuit that allows you to maximize the bass output of any auto sound audio system while restraining destructive bursts.