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DESCRIPTION JPS59177291

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DESCRIPTION JPS59177291
[0001]
Brief description of the drawings
[0002]
FIG. 1 is a perspective view showing an example of a conventional loudspeaker apparatus for
loud-speaking, and FIG. 2 is a diagram showing one embodiment of a loudspeaker apparatus
according to the present invention, where a is its perspective and b is its internal state. It is
sectional drawing containing the circuit factor shown. In the drawings, the same members are
denoted by the same reference numerals, and 1o is a housing, 12 to 16 are main loudspeakers,
30 to 36 are holdback speakers, and 68 ° 70 are variable for adjusting the reproduction sound
pressure level. A resistor 72 is a changeover switch.
11-04-2019
1
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