Phase shift low frequency loudspeaker system

Details Phase shift low frequency loudspeaker system Phase shift low frequency loudspeaker system

1981-05-18

1983-09-06

Rubinson, G. Z.

179 1GP, 1791155PS, H04R 128

Patent

active

044031122

ABSTRACT:
An audio speaker system is disclosed providing improved fidelity of performance from overdamped woofer drivers in small sealed enclosures. At least two woofer drivers are employed, and are driven electrically in such a manner that the phase difference in the electrical signals to the two drivers, or sets of drivers if more than two are employed, will be near zero at the lowest bass frequency and will increase to a value up to 180 degrees at the highest bass frequency which is generally taken as the woofer-midrange crossover frequency. This aforementioned phase difference in the electrical signal inputs to two sets of woofers common to one sealed enclosure improves over prior art by providing increased low-bass acoustic output, less acoustic wave interference between the woofers and the midrange drivers, and a smoother input impedance characteristic in the bass frequency region.

REFERENCES:
patent: 3725586 (1973-04-01), Iida
patent: 3984635 (1976-10-01), Nestorovic et al.

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