Abstract: A dual coil transducer is provided that has a low profile construction. The transducer includes a voice coil disposed around a central region of the transducer, a diaphragm with flexible suspension extending generally outwardly from the central region and including an inner edge attached to the voice coil, where the diaphragm includes a concave surface, and at least one magnet assembly disposed forward of the concave surface, where the at least one magnet assembly defines at least two magnetic gaps disposed about the central region. The transducer will usually be mounted with the motor outside of the loudspeaker enclosure for best heat dissipation.

Abstract: A dual coil transducer is provided that has a low profile construction. The transducer includes a voice coil disposed around a central region of the transducer, a diaphragm with flexible suspension extending generally outwardly from the central region and including an inner edge attached to the voice coil, where the diaphragm includes a concave surface, and at least one magnet assembly disposed forward of the concave surface, where the at least one magnet assembly defines at least two magnetic gaps disposed about the central region. The transducer will usually be mounted with the motor outside of the loudspeaker enclosure for best heat dissipation.

Abstract: A dual coil transducer is provided that has a low profile construction. The transducer includes a voice coil disposed around a central region of the transducer, a diaphragm with flexible suspension extending generally outwardly from the central region and including an inner edge attached to the voice coil, where the diaphragm includes a concave surface, and at least one magnet assembly disposed forward of the concave surface, where the at least one magnet assembly defines at least two magnetic gaps disposed about the central region. The transducer will usually be mounted with the motor outside of the loudspeaker enclosure for best heat dissipation.

Abstract: An electromagnetic transducer includes a housing, a diaphragm, a conductive coil, and a magnetic assembly having a plurality of air passages. The coil communicates with the diaphragm such that a flexible portion of the diaphragm is movable in response to movement of the coil. The coil includes axially spaced first and second coil portions. The magnetic assembly is disposed in the housing and is axially spaced from the diaphragm by an interior region. The coil portions are at least partially disposed in an annular gap formed in the magnetic assembly. Each air passage communicates with the interior region and with a respective aperture of the housing. The air passages provide respective air flow paths between the diaphragm and the ambient environment. Air flow through the passages is affected by movement of the flexible diaphragm portion for transferring heat from the transducer to the ambient environment.