Abstract: A motorcycle having an open-air cockpit area and a seat configured to receive a rider and position the rider within the open-air cockpit area. A luggage container defines a substantially enclosed cargo volume, and the luggage container is configured to open to provide selective access to the cargo volume. A speaker is configured to output sound in response to signals from a source. A speaker enclosure at least partially encloses the speaker. A bass-reflex passage couples an interior space of the sparker enclosure and the cargo volume of the luggage container.

Abstract: A motorcycle having an open-air cockpit area and a seat configured to receive a rider and position the rider within the open-air cockpit area. A luggage container defines a substantially enclosed cargo volume, and the luggage container is configured to open to provide selective access to the cargo volume. A speaker is configured to output sound in response to signals from a source. A speaker enclosure at least partially encloses the speaker. A bass-reflex passage couples an interior space of the speaker enclosure and the cargo volume of the luggage container.

Abstract: A returnless coil motor assembly comprising a voice coil, first and second magnets, the poles of the first and second magnets providing aligned, opposing lines of force in first and second opposite directions, a first spacer having a first face adjacent a pole of the first magnet and a second opposite face, a second spacer having a first face adjacent the like pole of the second magnet and a second opposite face, a third magnet oriented between the second faces of the first and second spacers, and the voice coil mounted in close proximity to the third magnet, the third magnet providing lines of force extending in a third direction generally transverse to both the first and second directions, and the voice coil having a direction of motion extending generally perpendicular to the third direction.

Abstract: A transducer comprises a diaphragm including a perimeter, a motor for causing the diaphragm to vibrate in response to an electrical signal corresponding to program material to convert the electrical signal to motion of the diaphragm and thus to an audio reproduction of the electrical program material signal, and a surround and a frame for supporting the diaphragm from its perimeter to permit such motion. Additional diaphragm supports are provided on the frame and project from the frame toward the diaphragm. Additional compliances are provided on the diaphragm and are coupled to the additional diaphragm supports. The additional compliances are located adjacent the additional diaphragm supports.

Abstract: An electrodynamic transducer includes a magnet structure (14, 28, 30) having inner (31) and outer (14) poles defining between them an air gap (17), a diaphragm (12), and a voice coil (44). Openings (18) are provided in the outer pole (14), the openings (18) extending generally parallel with the air gap (17) and the direction of motion of the voice coil (44) in the air gap (17). The voice coil (44) is coupled to the diaphragm (12) by ribs (40) extending transversely across the air gap (17) and through the openings (18) for securing the voice coil (44) to the diaphragm (12).

Abstract: An enclosure (10) for mounting two transducers (12, 14) includes a wall (20, 22) defining an enclosure (10) interior. The enclosure (10) also includes a wall (54 and/or 56) for dividing the enclosure (10) interior into a first portion (16) and a second portion (18). The enclosure (10) wall (20 and/or 22) includes a vent (52) for venting one of the first (16) and second (18) portions outside the enclosure (10), and a vent (74) for venting the other of the first (16) and second (18) portions outside the enclosure (10). The enclosure (10) further comprises a step (38) for mounting a transducer (12) perimetral edge. The step (38) extends inwardly from the enclosure (10) wall (20 and/or 22) into the enclosure (10) interior. The vent (52) for venting one of the first (16) and second ( 18) enclosure portions is provided between the step (38) and the back of the enclosure (10).

Abstract: A sound system comprises a source of program material, a transducer coupled to the source to produce an audible signal related to the program material, a controllable bass contour control network having a control terminal, a power amplifier, a second transducer and a low pass filter. The controllable bass contour control network is coupled to the program material source. The power amplifier is coupled to the controllable bass contour control network. The second transducer and the low pass filter are coupled to the power amplifier. The low pass filter is coupled to the control terminal of the controllable bass contour control network. The output of the lower pass filter controls the contour of the signal supplied from the program material source through the controllable bass contour control network to the power amplifier based upon the signal provided by the power amplifier to the low pass filter. The control terminal comprises a terminal of a light sensitive resistor.

Abstract: A multi-driver loudspeaker combination includes a first transducer of the dynamic radiator type, designed to reproduce sound in the lower portion of the audio frequency range. The radiator of the first transducer includes a diaphragm. The combination also includes a second transducer designed to reproduce sound in the upper portion of the audio frequency range. A base support, which is somewhat horn-shaped, is mounted on the first transducer diaphragm, a voice coil form, or dust cap, or some combination of these, within the periphery of the first transducer diaphragm, and extends away from the first transducer. This base support terminates at an edge remote from the first transducer. The edge is in the form of a closed plane curve. The second transducer includes a diaphragm having a perimetral edge which is joined to the edge of the base support to support the second transducer from the first.

Abstract: A multi-driver loudspeaker assembly having high and low frequency transducers in which the high frequency transducer(s) is directly coupled to the diaphragm of the low frequency transducer and is movable therewith.