Do you desire ultra-deep bass that you can not only hear but also feel? Then you have two options: 1) Use conventional subwoofers and crank up the volume to the pain threshold, or 2) Use the "Bass-Pump III." Unlike regular speakers, the heavy "Bass-Pump III" has no diaphragm. Instead, it is securely bolted to the vehicle floor. This allows the body sound perceived as deep bass to be transmitted directly to the listener. Now you can experience music with the intensity of a live concert even at moderate volumes. But the "Bass-Pump III" can be used not only in cars. Home theaters, Dolby Surround systems, HiFi setups, and multimedia shows also benefit greatly from it. The connection is incredibly simple and is done just like a regular speaker or subwoofer.