Two-way speaker with transformer-coupled split coil

Details Two-way speaker with transformer-coupled split coil Two-way speaker with transformer-coupled split coil

1979-02-08

1980-09-02

Cook, Daryl W.

1791155DV, H04R 126, H01F 500

Patent

active

042208327

ABSTRACT:
A loudspeaker with an overlay or bifilar wound split voice coil, a coil for driving a higher frequency speaker such as a tweeter, and a push-pull audio amplifier circuit directly coupled with the coils. The configuration of the split coil provides two coaxial voice coils that produce a transformer coupling at high frequencies. This coupling compensates for the normally experienced increased input impedance at high frequencies and results in a fairly constant input impedance over a large frequency range, facilitating uniform power transfer to the speaker. The high frequency voice coil is coupled across the split coaxial coils and is energized at high frequencies by a combined signal which includes the signal directly applied to one of the coaxial coils and the induced signal in the other coaxial coil.

REFERENCES:
patent: 2007748 (1935-07-01), Olson
patent: 2164374 (1939-07-01), Barker
patent: 2205365 (1940-06-01), Schwaen
patent: 2925541 (1960-02-01), Koch
patent: 2959640 (1960-11-01), Schultz
patent: 3196211 (1965-07-01), Kessenich
patent: 3686446 (1972-08-01), Manger

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