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DESCRIPTION JPS5883500

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DESCRIPTION JPS5883500
[0001]
The present invention relates to a speaker system compatible with large input. A conventional
speaker system is configured as shown in FIG. That is, the low sound speaker 2 and the high
sound speaker 3 are incorporated in the speaker box 1 and the sound absorbing material 4 is
accommodated in the speaker box 1 ', and the high noise speaker 3 is provided with the dividing
network 6 and the overcurrent breaker 6 It was heard to apply an input signal through. This is
because a thin wire is used for the voice coil of the high-pitched speaker 3 and it is easy to be
burnt out, so an over-current shut-off pin is connected. However, this overcurrent breaker 6 is
disadvantageous in cost, has variation in operating current, and has a disadvantage that the
protection of the high-pitched speaker 3 can not be completely measured when a large input is
applied. SUMMARY OF THE INVENTION The present invention is intended to eliminate the
above-mentioned conventional drawbacks, and it is an object of the present invention to provide
a speaker system which sufficiently withstands a large input application and which is
advantageous also in terms of cost. In order to achieve the above object, the present invention is
characterized in that a wire having a temperature coefficient of electric resistance larger than
that of a voice coil of a speaker for bass is used as a voice coil of a high or medium or high pitch
speaker. . Hereinafter, an embodiment of the present invention will be described with reference
to FIG. A speaker box 7 is provided with openings 8 and 9 in the front of the speaker box 7, and
the low frequency speaker 0. A high tone speaker 1 is incorporated. lc, the sound absorbing
material 12 is accommodated in the speaker box 7, and the above-mentioned bass speaker 0. A
lead 13 for applying an input signal is connected to the high-tone speaker 1, and a dividing work
14 is connected to the high-tone speaker 1. The wire of the voice coil of the high-pitched speaker
1 is thin so as to reduce the mass for reproduction at a high frequency than the wire of the voice
coil of the low-pitched speaker 0, and one having a large temperature coefficient of electric
resistance is used. For example, a copper wire is used as a wire of the voice coil of the low
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1
frequency speaker 0, and a sodium aluminum alloy wire is used as a wire of the voice coil of the
high-tone speaker 1. With this configuration, the impedance exhibited by the voice coil of the
high-tone speaker 1 at the time of large input application becomes larger than the impedance
exhibited by the voice coil of the roaring speaker, and when driven by a constant voltage power
amplifier The input signal applied to the speaker is less than that for the bass speaker and will be
spared from damage.
In the above embodiment, a two-way speaker system is described, but a three-way speaker
incorporating a medium sound speaker is used, and a wire having a large temperature coefficient
of electric resistance is also used as a wire material of the voice coil of the medium sound
speaker. Just do it. As described above, since the speaker system of the present invention is
configured, the wire material of the voice coil of the high-tone, middle, or high-tone speaker can
be sufficiently resistant to a large input application simply by making the wire of the voice coil of
the electric resistance large. Therefore, the protection measures are also perfect, the operation is
stable, the cost is remarkably advantageous as compared with the conventional one using an
overcurrent breaker, and the industrial value is great.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a schematic sectional view showing a conventional speaker system, and FIG. 2 is a
schematic sectional view showing one embodiment of the speaker system of the present
invention.
7 ...... speaker box, I delta ...... woofer, 11 ...... tweeter, 12 ...... sound absorbing material, 13 ......
read Line 14 ..... Dividing network. Name of Agent Attorney Nakao Toshio and one other person
Ml Fig. 2
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