Concentric co-planar multiband electro-acoustic converter

Details Concentric co-planar multiband electro-acoustic converter Concentric co-planar multiband electro-acoustic converter

2005-06-28

2005-06-28

Kuntz, Curtis (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S412000, C381S420000

Reexamination Certificate

active

06912292

ABSTRACT:
A compound loudspeaker drive unit comprising a first drive unit and a second drive unit arranged co-axial with respect to the center axis of the loudspeaker, and each drive unit comprises permanent magnet means and pole piece means together forming a magnetic circuit with a pole gap for exciting a voice coil assembly, each pole gap providing magnetic field directed radially with respect to a center axis of the loudspeaker. At least one of the permanent magnet means has a radially extending magnetization direction with respect to said center axis of the loudspeaker and the acoustic centers of said drive units substantially coincide.

REFERENCES:
patent: 5214710 (1993-05-01), Ziegenberg et al.
patent: 5786741 (1998-07-01), Leibzon

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