Sound equipment system

Details Sound equipment system Sound equipment system

1990-12-28

1992-10-06

Isen, Forester W.

Electrical audio signal processing systems and devices

Audio transducer protection circuitry

381 28, 381 85, 381116, 381120, 330197, H03G 1100

Patent

active

051539144

ABSTRACT:
In a sound system having a sound source for generating sound signals, a low-impedance amplifier for amplifying the generated sound signals, and high-impedance loudspeakers for reproducing audible sound from the amplified sound signals, an impedance conversion device having a step-up transformer section is disconnectably connected between the amplifier and the high-impedance speakers. The output side of the low-impedance amplifier is also connected directly to low-impedance loudspeakers. Thus the sound system can be operated to selectively broadcast either monaural sound or binaural stereo music of high quality.

REFERENCES:
patent: 2030573 (1936-02-01), Dull
patent: 4289936 (1981-09-01), Civitello
patent: 4323736 (1982-04-01), Strickland
patent: 4864624 (1989-09-01), Tichy
LM380, National Semi-Conductor and Power Audio Amplifier 1922, p. AN69-4.

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