A subwoofer cabinet having a volume less than 1 ft3; axially aligned openings in opposed cabinet walls; first and second cages mounted on respective ones of the walls in alignment with the openings; a voice coil driven driver including an annular 225 oz. Such methods, compounds, and composition are useful to treat, prevent, or ameliorate Huntington’s Disease. The system then post-processes the haptic effect definition by adjusting a force value based on an estimate or measurement of a state of the actuator during a playing of the haptic effect. The characteric feature of the device is that an indicator figure is adjusted to a dropping weight, the indicator figure has a guide organ, wherein one of the guide organs and the guide body are at least periodically in a connection with each other restricting the direction of movement and the guide body is complemented with a length measuring unit.