Abstract: A waveguide mounted in the area beneath the helm of a boat directs acoustic output from one or more loudspeakers to its windshield where the sound can be contained, reinforced and directed toward the entertainment areas of the boat.

Abstract: A loudspeaker system is provided in which a passive radiator and a driver are connected to one another within a speaker enclosure by an acoustic coupler having a coupler opening such that the driver and the passive radiator are located in different planes.

Abstract: A method and apparatus for mounting a loudspeaker within a cavity in the wall of a room to lessen the transmission of vibration to the wall comprises a weight support member coupled to the speaker cabinet and at least one flexible member extending from the speaker cabinet into engagement with wallboard or other wall sections forming opposite sides of the wall.

Abstract: A loudspeaker is provided in which precise alignment is obtained between the frame and motor assembly before they are connected to one another so that a voice coil coupled to the frame may be properly radially and vertically positioned with respect to a magnetic gap in the motor assembly while allowing the motor assembly and frame to be easily and quickly separated from one another to perform repairs or complete replacement of the motor assembly.

Abstract: A loudspeaker is provided in which precise alignment is obtained between the frame and motor assembly before they are connected to one another so that a voice coil coupled to the frame may be properly radially and vertically positioned with respect to a magnetic gap in the motor assembly while allowing the motor assembly and frame to be easily and quickly separated from one another to perform repairs or complete replacement of the motor assembly.

Abstract: A loudspeaker is provided in which precise alignment is obtained between the frame and motor assembly before they are connected to one another so that a voice coil coupled to the frame may be properly radially and vertically positioned with respect to a magnetic gap in the motor assembly while allowing the motor assembly and frame to be easily and quickly separated from one another to perform repairs or complete replacement of the motor assembly.

Abstract: A loudspeaker and method of assembly according to this invention provides for precise alignment between the frame and motor structure before they are connected to one another, and employs a fixture to form the moving assembly of the speaker, i.e. the voice coil, upper and lower suspensions and diaphragm, outside of the frame so that concentric tolerance stack-up is minimized. The moving assembly, once formed, is mounted as a unit to the frame and motor structure to facilitate assembly and repair of the speaker.

Abstract: An air deflector is positioned relative to the through bore in the pole piece of the motor structure of a speaker such that the flow of air entering and leaving a cavity overlying the voice coil and pole piece is directed along a flow path which passes in thermal communication with at least a portion of the inner surface of the former of the voice coil opposite the wire winding on the outer surface of the former.

Abstract: A system (10) and method (50) of equalizing an audio signal from an existing radio or head unit (30) using an interface unit (10) between the radio or head unit and a replacement load (34) can include the steps analyzing (64) an existing equalization to provide a measure of an existing frequency response, generating (66) a substantially inverted frequency response to the existing frequency response, and applying (74) the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit (12) having an automatic input level control unit (14), an analog to digital converter or digitizer (16), a DSP (18) providing an output to a DAC (20), a level booster unit (22) and a processor such as a microcontroller unit (24).

Abstract: A multi-jacket electrical cable that includes an inner insulation jacket wrapped around or extruded onto one or more electrical conductors and an outer insulation jacket that is wrapped around or extruded onto the inner jacket and is removable therefrom. Each jacket includes a different characteristic such as color, texture of pattern. A user of the electrical cable of the present invention can designate the wire to be used for a particular purpose, such as a ground wire, or a high voltage wire, by removing a jacket until an inner jacket is exposed, where the exposed jacket has a characteristic that matches the user's desired intention for the wire.

Abstract: A loudspeaker is provided in which the outer diameter or foot of the spider is over molded with a standoff formed of a plastic material in an injection molding tool so that the spider and standoff form an integral unit. The standoff, in turn, is glued or otherwise affixed to the frame of the speaker to provide accurate centering of the voice coil relative to the magnetic gap of the motor structure.

Abstract: This invention is directed to a loudspeaker having a lead wire management system including guides located at both the voice coil and the frame of the speaker. Each guide is angled allowing them to control the arc at which the lead wires extend between the voice coil and frame, and rounded edges of the guides relieve stress on the lead wire joint connections during motion of the voice coil.

Abstract: A loudspeaker and method of assembly according to this invention provides for precise alignment between the frame and motor structure before they are connected to one another, and employs a fixture to form the moving assembly of the speaker, i.e. the voice coil, upper and lower suspensions and diaphragm, outside of the frame so that concentric tolerance stack-up is minimized. The moving assembly, once formed, is mounted as a unit to the frame and motor structure to facilitate assembly and repair of the speaker.

Abstract: A system (10) and method (50) of equalizing an audio signal from an existing radio or head unit (30) using an interface unit (10) between the radio or head unit and a replacement load (34) can include the steps analyzing (64) an existing equalization to provide a measure of an existing frequency response, generating (66) a substantially inverted frequency response to the existing frequency response, and applying (74) the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit (12) having an automatic input level control unit (14), an analog to digital converter or digitizer (16), a DSP (18) providing an output to a DAC (20), a level booster unit (22) and a processor such as a microcontroller unit (24).

Abstract: A system (10) and method (50) of equalizing an audio signal from a factory installed radio (30) using an interface unit (10) between the factory installed radio and a replacement load (34) can include the steps of measuring (52) an existing equalization for the factory installed radio in the interface unit, analyzing (64) the existing equalization to provide a measure of an existing frequency response suited for an old load, generating (66) a substantially inverted frequency response to the existing frequency response, and applying (74) the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit (12) having an automatic input level control unit (14), an analog to digital converter or digitizer (16), a DSP (18) providing an output to a DAC (20), a level booster unit (22) and a processor such as a microcontroller unit (24).

Abstract: A power converter (10) operating in all four voltage-current quadrants includes an input voltage source (14), an output current independent of an output voltage and a switching arrangement (12, 16, 18, and 20) enabling an output terminal (26) to be in common with an input terminal. The output voltage can be unconstrained by an input voltage from the input voltage source.

Abstract: A system (10) and method (50) of equalizing an audio signal from a factory installed radio (30) using an interface unit (10) between the factory installed radio and a replacement load (34) can include the steps of measuring (52) an existing equalization for the factory installed radio in the interface unit, analyzing (64) the existing equalization to provide a measure of an existing frequency response suited for an old load, generating (66) a substantially inverted frequency response to the existing frequency response, and applying (74) the inverted frequency response to the replacement load to provide a desired response. Such as system can include an interface unit (12) having an automatic input level control unit (14), an analog to digital converter or digitizer (16), a DSP (18) providing an output to a DAC (20), a level booster unit (22) and a processor such as a microcontroller unit (24).

Abstract: An enclosure for one or more loudspeakers includes a housing having a top panel, a bottom panel, a front panel, a back panel and opposed end panels collectively defining a hollow interior which is open at an aperture formed in one of the panels. A baffle is mounted within the housing interior which supports one or more loudspeakers and forms a port to direct sound radiating from the back of the speakers to the aperture. All of the panels, and at least the portion of the baffle which is visible through the aperture, are covered with carpeting to provide a finished appearance for mounting of the enclosure within the interior of a vehicle.

Abstract: A loudspeaker comprises a motor structure which incorporates a magnetic flux control system including a field winding, a controller connected between a voltage source and the field winding and, a polarity reversal switch preferably located across the filed winding. The magnetic flux control system is operative to produce a magnetic flux, which, depending on the level and polarity of electrical current supplied to the field winding, either reinforces or opposes the static magnetic flux produced by the magnet of the motor structure of the loudspeaker, thus altering the motor strength of the loudspeaker system.