Compound loudspeaker drive unit

Details Compound loudspeaker drive unit Compound loudspeaker drive unit

1994-08-16

1996-08-20

Kuntz, Curtis

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

381205, H04R 2500

Patent

active

055486576

ABSTRACT:
A compound loudspeaker drive unit comprises a low frequency unit having an outwardly and forwardly flaring conical diaphragm and a high frequency drive unit located in or adjacent to the neck of the low frequency conical diaphragm such that the acoustic centers of the two units are substantially coincident and, for a cross-over frequency range in which both drive units contribute significant sound output, the directivity of sound radiation from the high frequency unit as acoustically loaded by the low frequency conical diaphragm is substantially the same as that of the low frequency unit. A magnet structure for the high frequency unit utilises a magnet formed of neodymium iron boron which enables the high frequency unit to be positioned within a drive coil for the low frequency diaphragm while providing a required high value of magnetic flux.

REFERENCES:
patent: 3917914 (1975-11-01), Parker
patent: 4465905 (1984-08-01), Nation
patent: 4492826 (1985-01-01), Chiu
patent: 4552242 (1985-11-01), Kashiwabara
patent: 4590333 (1986-05-01), Strohbeen
patent: 4685448 (1987-12-01), Shames
patent: 4811406 (1989-03-01), Kawachi
"Ccomposite Speaker"--Tanaka, JP Abstracts Jan. 1985.

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