Abstract: A system for remotely controlling jet pump, lighting, and air blower settings in a spa or hot tub through an integrated audio system. A wireless remote control sends signals to the integrated audio system, where the signals are interpreted, and communicated to the spa through an interface.

Abstract: A system for automatically adjusting the audio level in response to spa jet pump and air blower settings in an audio system mounted in a spa or hot tub. A preferred embodiment includes a spa pump/blower sensor apparatus, and an electronic controller circuit which interfaces to the audio system and the spa pump/blower sensors.

Abstract: An apparatus for magnetically transferring control information from a rotary knob with a knob mounted in a manner which facilitates rotation, a magnetic material about the circumference of the knob with alternating field lines perpendicular to the direction of knob rotation, a magnetic detector, an electronic circuit for decoding the detected magnetic variations corresponding to knob rotation, and a frame upon which the knob and magnetic sensor are mounted. In a preferred embodiment, the knob is designed in such a manner as to provide an environmental seal between the front and rear side of the frame to which it is mounted.