Monitor ampliphones

Details Monitor ampliphones Monitor ampliphones

1978-10-12

1981-01-13

Olms, Douglas W.

179 1MN, 179 1R, H04S 300

Patent

active

042451361

ABSTRACT:
An improved quadraphonic headphone arrangement in which a first audio signal is coupled to a speaker in each headphone and a second audio signal, usually monaural, is coupled to an amplifier and then to a second speaker in each headphone. Switching means are also provided so that the second speakers may be connected directly to the second audio source without amplification. The headphone is used as a musician's practice aid or for track-making or similar purposes. A prerecorded signal is coupled to the first speakers while the musician's electronic instrument output is coupled through the amplifier to the second set of speakers.

REFERENCES:
patent: 3702901 (1972-11-01), Cherry
patent: 3710034 (1973-01-01), Murry
patent: 3794779 (1974-02-01), Greuzerd et al.
patent: 3796840 (1974-03-01), Ohta
patent: 3984885 (1976-10-01), Yoshimura et al.

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