Coaxial speaker unit

Details Coaxial speaker unit Coaxial speaker unit

1988-06-20

1989-04-11

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381182, 381188, 381189, H04R 906, H04R 124, H04R 902

Patent

active

048213314

ABSTRACT:
A coaxial speaker includes a low-frequency band speaker diaphragm which supports, at its inner periphery, a dust-proof member for the speaker core, via a step portion located on the diaphragm at this location. The step portion is planar and generally perpendicular to the speaker bobbin, and may be either a continuous ring or a series of discrete steps arrayed circularly.

REFERENCES:
patent: 2070977 (1937-02-01), Quinnell
patent: 2539672 (1951-01-01), Olson et al.
patent: 3796839 (1974-03-01), Torn
patent: 4017694 (1977-04-01), King
patent: 4492826 (1985-01-01), Chiu
patent: 4552242 (1985-12-01), Kashiwabara

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