Loudspeaker apparatus for electronic keyboard musical instrument

Details Loudspeaker apparatus for electronic keyboard musical instrument Loudspeaker apparatus for electronic keyboard musical instrument

1992-11-16

1994-08-02

Kuntz, Curtis

Electrical audio signal processing systems and devices

With musical instrument

381159, 381 88, 84719, 84744, 181145, 181199, G10H 100, H05K 500

Patent

active

053352831

ABSTRACT:
A loudspeaker apparatus for an electronic keyboard musical instrument has a shelf board constituting a casing of the musical instrument. The shelf board has a sound emission opening and a first port. A loudspeaker is mounted on an upper side of the shelf board in alignment with a fringe of the sound emission opening. A first speaker box is mounted on the upper side of the shelf board so as to enclose the loudspeaker and the first port. A second speaker box is mounted on a lower side of the shelf board in fluid communication with the first speaker box via the first port. The second speaker box has a second port.

REFERENCES:
patent: 4524846 (1985-06-01), Whitby
patent: 5086686 (1992-02-01), Misawa et al.

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