Adjustable speaker box

Details Adjustable speaker box Adjustable speaker box

1994-08-09

1995-05-23

Dang, Khanh

Acoustics

Sound-modifying means

Housing or enclosure

381159, A47B 8106

Patent

active

054183383

ABSTRACT:
A speaker box with pivotally installed divider providing an adjustable volume. One embodiment is a large, rectangularly shaped wooden speaker box which is centrally partitioned into two separate chambers, each of which houses one woofer. Each chamber contains a pivotally installed divider. A nut mounted on the divider is threadedly connected to a bolt which is rotated by a motor and which is mounted to the rear wall of the speaker box. Thus, when the motor rotates the bolt, the divider is pulled toward or pushed away from the rear wall of the speaker box. Regardless of the position, the moveable divider is a virtual rear wall of the volume and therefore defines the volume available for amplified bass. Another embodiment is a cylindrically shaped wooden tube which houses only one woofer. In much the same way as described for the rectangular speaker box, a circular divider is mounted within--allowing the amount of interior space used by the speaker to be adjusted.

REFERENCES:
patent: 5304747 (1994-04-01), Hale, II

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