The magnet (large mass) is moved by a music signal and the vibrations are transmitted to the substrate. The result is (depending on the surface) structure-borne sound, or audible sound. Can be used in cars, especially convertibles, or vehicles without subwoofer capability. A must in any home theater: bass, engines and explosions are not only audible, but also clearly noticeable. Likewise, PC and console games gain significantly more reality.The Mini bassPUMP would even be installed under your desk chair. If the "big" bassPUMP is already flexible due to its small size, you now have with the Mini bassPUMP almost infinite application possibilities.