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JPS5173026

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DESCRIPTION JPS5173026
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram of a general Sbica system,
FIG. 2 is a circuit diagram of a Sbica system to which a conventional sound quality adjusting
mechanism is added, and FIG. 3 is FIG. FIG. 4 is a diagram showing frequency-to-sound pressure
level characteristics of the speaker system of FIG. 2, FIG. 4 is a circuit diagram showing a first
embodiment of the present invention, and FIG. 5 is a frequency of a single system of FIG. FIG. 6 is
a circuit diagram showing the second embodiment of the present invention, FIG. 7 is a circuit
diagram showing the third embodiment of the present invention, and FIG. FIG. 7 is a diagram
showing the frequency a versus sound pressure level characteristics of the speaker system of FIG.
7, and FIG. 9 is a circuit diagram showing a fourth embodiment of the present invention. :
иииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииииии Inductor, C1, C2, ? CC ? Q, C13 ииииии capacitor, ATT и и и и и и
Atsuteneta, vR и и и и и и variable resistor 4, film-53- Utility Model 51-73026 (2) i2 Certainly J , P ?
J 4 ? no 5 ?-54-real opening 51-730 26 (3)! C.beta. J 7 m-55 1 ? 51-73026 (4) j 2 B 1 56-
DETAILED DESCRIPTION OF THE INVENTION This discussion relates to a multi-way bi-force /
stem using a crossover network, and relates to one that improves the% .ltoreq.2 f jilll E frame.
Crossover work network 2 J input signal is divided into 4 # area and added to the river in the
valley ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 7 stem ?, 11 W is a small 1b 611 I ? ?.
That is, when an input signal to the input terminal Ll, t2 dark is applied to a bass и bee force
(hereinafter referred to as ? и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и ??
W The high fm speaker (hereinafter referred to as tweeter). C) to be added to T). ???????
???????????????????????????????????? In the speaker
system configured as described above, the reproduction-wave number band of each of the woofer
W and the tweeter T is divided into two as shown in FIG. The song @A, B or the crossover point
joo is called the crossover frequency. Also, when the cross over path is made up of only Ll and
01, the high-frequency attenuation characteristics of the woofer W and the low-frequency
attenuation characteristics of the tweeter T are each (id B / octave, but four more woofer W,
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When the tweeter T6 nidenden tCB and the inductor L2 are added in a single row ? two, the
attenuation writeability becomes valley l2d) l / octave. In the speaker system of this machine, in
order to obtain the most suitable characteristics for squirrel now и n и room, it is necessary to use
a signal circuit (two tweeter T signal circuits (two t Many have inserted an attenuator ATT so that
the sound pressure level of the tweeter T can be changed relative to that of the woofer W. In this
case, when the attenuator ATT is adjusted, the regenerated cylinder wave number band
characteristics of the tweeter T Is the song 1 shown by Mm in FIG. Change as B'1B '... [7, the
pressure level of the tweeter T changes by one degree C]. Therefore, when the reproduction
frequency of tweeter T which is emitted by% C ni-crossover frequency j0 is wide ? 2, the sound
pressure level changes not only in the high range but also in the middle range, and the frequency
characteristic is around the crossover frequency j0 There is a drawback that it becomes a steplike shape at the center and the sound quality is undesirable for a feeling of humility. Midori,
considering that the original purpose of the tone adjustment mechanism in the speaker system is
to balance the sound pressure level between the low range and the genus according to the
acoustic characteristics of the listening room. It is more effective to adjust only to the highpitched or low-pitched sound and pressure level without changing.
The present invention is considered to have the above-mentioned point, and the purpose is to
make it possible to change only the sound pressure level of C high range or low range
accompanied with the change of sound pressure level of middle range. To provide a sneaker
system capable of performing effective t quality gI4Ii. The details of the present invention will be
described below with reference to the drawings. The fourth factor is the first example of the
present invention. In the speaker shown in FIG. 2, the tweeter T, the series C double inductor L8,
and the oJ variable resistor ivh are used alone. In this case,% LJl and one row 7m of VR act as
equivalent or approximate i two-way inductors. That is, one resistance resistance of the variable
resistor VR being zero is equivalent to $ 1 meat, but when the resistance value is increased, the
thickness of the interlayer L8 is effective, and the difference of the evening of the circuit is
equivalent. C is raised, and the resistance value of VR is maximum and the inductance is
maximum. Number '1' ;! 1 Therefore, as the resistance value of the variable resistor VL is
gradually increased, the impetuous m * several imperial echoes of the tweeter T are shown in
FIG. 5, song 41BO) state bs la m4ii! ?????? It changes like B .... That is, the sound pressure
levels in the low and mid ranges are 1 ?, and only the sound pressure level in the ^ range
changes. If the late C two town transformation mortgage agent VR%-listening room ? two
together, 1 l i III, each station will be able to obtain its frequency response of its lisnonin groom
sounding a balance between the low range and the local range In addition, it is possible to hear
good f * on hearing alike without the omission of the midrange. Further, in the case of the above
5s, in the example, even when the U variable resistance aVR is OJf, the period tLa where the
noise reduction region starts to be reduced, that is, the ^ turnover noble constant of the tweeter T
can be obtained. It should be noted that in the above case, variable # and variable VR may be
used so that they can finally be turned on when the value is increased. Also, the variable resistor
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VR is There may be a difference of-straight ?? 2 changes, stepwise ? 2 changes). The 6th
section is a diagram showing the 482 real island example of the present invention, and a
plurality of switching taps are provided on the clean reactor LB, and the variable reactor is
configured by switching over with the off S switch 81. Even in this case, the same effect as the
embodiment shown in FIG. However, in the case of this embodiment, when the changeover
switch 81 is switched, the sound pressure level of the tweeter T is both equal to or less than two.
Fig. 7 shows Ai! In the eighth embodiment of I4 of the present invention, an attenuator TT and an
inductor L8 are inserted into the signal t & t of the tweeter T, and a variable resistor M 17 is
inserted so that they can be cancerous and oJ tear It is In this case, the change% deviation of the
attenuator ATT and the variable air resistance l1IFvR + 7) f ratio characteristics may differ by, for
example, ? ? two where the change amount of the latter is g dB when the change amount of the
one is ddB. In addition, it is possible to make the attenuator ATT and the oJi grinder VH be of the
clutch type, and change them by pigeon movement, or change them by a single male. If this
number 751 is obtained, it is possible to interlock at- tne-4 ATT, noise, and variable resistor VR at
an arbitrary ratio. In the case of the above configuration, when the sound quality is adjusted, the
reproduction 8-wave number band characteristic of the tweeter T changes as W & 8 bad * mB'lB.
That is, the sound pressure level of the middle range of the adjustment C two JIJ tweeter T of the
attenuator ATT and the variable resistor VR, the sound pressure level of the yoho Mf *
simultaneously C change or the high range C two root aJ Since the influence of the adjustment of
the VR becomes three, the change becomes more remarkable as the treble range. As described
above, according to the above embodiment, not only the false tone range but also the sound
pressure level in the middle range is one! ! 1 possible. In this case, since the sound pressure level
change in the middle range is smaller than that in the high range, the II 4 wave a inertia does not
become the conventional ((: polar port N step shape, and sound quality adjustment preferable for
toughness) be able to. In the above example, tweeter T and series-two E + J seismic inductor? The
sound pressure repel tone in the + 16f range is added by the insertion C and two things are done
to perform the tone adjustment gt, but I mentioned the sound pressure of the bass range from
the sound source 1 and C2 that insert the OT changing capacitor in series with the woofer W
Even if it is configured to adjust the sound level by adjusting the level, uniform effects can be
obtained. The ninth case is an example of the fourth embodiment of the present invention which
is an example thereof, and the signal circuit C two-way switch 82I of the woofer W: capacitors
C11 and C12, C18,... It is set as a configuration to extend the target C. In such a configuration,
when the changeover switch S2 is switched, the fIth levels of the middle range and the high
range are one pair, and only the sound pressure level of the low range C is changed C. Effective
sound quality # 1! You can take a bamboo shoot. Of course, the present invention is equally
applicable to a steel can stem equipped with a medium sound slider.
I explained above! According to the present invention 5, according to the present invention, the
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change of the sound pressure level of the midrange is accompanied by inserting a repulsive
inductor in the speaker for squeezing and the direct clearance or inserting an edible capacitor in
series with the speaker for the low heel Sound pressure level in high or low range "? 3 li," "ph
(fJ). ??????????? A speaker system that can be adjusted can be provided. Also, when
a variable inductance is inserted in series with the high-pitched speaker as in the example of $ 148, destruction of the high-pitched speaker by the C region of the ^ area of the amplifier for
driving the loudspeaker etc. It is.
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