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BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an embodiment of
the present invention. RL, RR, FL and FR ...... Speaker, RHI to RH 6 ...... Volume, Rb ...... Blend
resistance. /RHtRHsRH2t1−5ー
[Detailed Description of the Invention] @Application 1. Name of the device multiple stereo
playback device volume balance 114 rich l 2 2 新 総 実 用 11! Multichannel stereo signal Kj I!
Instead, the two-channel source OR via a multi-stereo pI device that drives a plurality of speakers
after the m is connected in series 111 [a both ends t t-delayed q modulation counter] , L signal
output terminals, insert variable resistances interlocking with these in I1 both towns R resistance
O possible-O connection, connect to the speaker 06 point after the variable resistance exciter I11
Volume resistance Jllll Bore 03, with a blend resistor connected to the left and right speakers O,
to drive the rear speakers in two-channel source with serial channel reverse phase, device O1 #
narrow 1 m 2 I # j non The invention relates to a multi-system stereo reproduction
reconnaissance f-balance balance circuit that converts a plurality of speakers into a stereo signal
KR converted into two channels or more. Recently, 4 channel yell stereo has become the
listening, but because it is the current stereo broadcast ri 2 channel source, this 2 channel source
is used, f ya, ne f, o. Sound effect The so-called pseudo 4-channel system is considered, ie, #
similar → channel system rt2 channel / sum signal of R, L signal of channel source and i, i signal
of R, Xsq issue is based on the blend 轟It is to drive the four speakers left front and back and
right #I by taking 0. In this case, 7 is important if the volume balance around 0 is taken, but the
volume balance tone adjustment while keeping the blend It is hoped that good sound quality can
be expected for the first time with a speaker who also plays a role, and that the circuit
configuration should be simple. Uninvented is something that has not been disliked in the above
circumstances. The volume balance of the multiple stereo reproduction apparatus which can be
combined with the volume performance tg of the front and back while keeping the blend
constant-the player tries to deliberately lance 1 l fi + # 4. The following @ ff1t # will explain
unrealized unrealistic S 宍. The figure shows the case where 2 channels are converted to 1-ary
stereo signal but OK j M. In the figure, xa, ym, Rm and Rm are speakers arranged in front left,
right, rear, left and right, t + -tll L is a 2 channel source Lgs issue too much output Kava terminal
at mass-t * sound B2 channel: /-output terminal to extract the JOB signal, # 1 child 會-t "-t @" O +
end 1 'l Eva t 1' @ "," u + "is grounded.
Therefore, the speaker Rsa, the speaker Rsa, and the one end (speaker R) are connected to one
end (speaker R) via the volume RHs of track 1 through the output terminal ts K @ and the other
end 1 through the second volume RHt Vr Ground. The first and second Bolihu ARHI, RHmt)
sliders of j [3 of the panel RH @ @ t-間 に ボ 0 volume RH $ of the slider between the sliders. ?
Connect to the L connection point. To a colleague, the speaker Rm, 装 m are directly mounted on
the 3-plate, and the 11111 (speaker RR side) t-storage → volume RH4 'of sIr is connected to the
output terminal t3 and the other end is 1g5 volume Ground through RRs. And the 'a #! The sixth
volume Rkl · is connected to the volume RHO of the s, RHsO slider O, and the slider of the
polygon RE · is connected to the connection point of the speaker 131.7 m and the speaker R &,?
The IIkM point of −, ie, connected to the 30th Borikum RHIO slider via a blend resistor Hb な お
Note that the volumes 1 to 6 of the above-mentioned 1st to 6th volumes JIHa to RE. (1) Each
slider is lII # at a time in the direction shown by the arrow shown in the drawing or in the
opposite direction. In addition, the volume uses a resistance value substantially equal to the
speaker impedance. In the illustrated shape, the rear left and right speakers Rm and R1 are shortcircuited n the front left and right speakers 11-1ymo are driven n. In this case, the speaker 1−1is added via the L signal and the blend resistor Rb The speaker 1N # iR + ΔL in the
recommendation 8rLe is driven by the sum with the signal −−− → − part, that is, L + Δh.
From this state, if you move the sliders 64 volumes R11 l to 111 · t), the left and right speakers R
& # R "on row resistance gradually becomes hot summer <e evening, the difference between the
speakers R & R 鳳 iJR, L signal The signal R-L11 is driven by L-R ◎ so xll9CIARHs-RB * o *
recommendation position tj by setting the desired volume Palan XKH by IJ * o in this adjustment
process Blend resistance wing b The resistance ratio between one end and the output terminal
and the ground is always kept constant. For example, the resistance reduction of volume RE • of
#i 纂 6 is compensated by the increase of resistance of volume RH @ of d # I 4 and the
compensation of the increase of resistance of Golik ^ RH @ of recommendation 5 is compensated
by the decrease of resistance of second volume RH 諺 n If the sliders of each volume RH1 to R1i
are at the opposite @ position shown in the figure, the front left and right O speakers F &, 7m is
short 11 & 5nlkljOXW- * R & , Rm () 4 mglll? !
5−nる。 In this way, in the case of the sound balance 11411 according to the invention, the
speaker after s is connected in series, and both shoulders are connected via the volume to the
R9L41 No. 2 channel source output terminal, and the sliding of the volume Connect the slider to
the priest's point of the front and rear speakers and insert the blend resistance into the rear left
and right speakers to connect the rear speakers in series Since it drives in the opposite phase and
drives the front speaker by the blend signal and further causes each volume to swing, it is
possible to easily adjust the p front and rear ol quantity performance by the d19 rim O operation.
. Moreover, since each volume is interlocked with 15 to complement each other's increase and
decrease, it is possible to always keep the blend signal foot and to expect reproduction with jL
sound quality. ナシ。 In the above-described embodiment, it is described about the case of
converting into 2-channel nelson-xf 4-ary stereo signal, and * converts multi-channel signal Km
of 5 or more yuan etc. Of course, it is possible to carry out various 6-R configurations within a
range that does not change the effect. Of course, as described above, according to the noninvention, the fJl balance after Kfll is easily adjusted without affecting the blend. It is possible to
provide a volume performance adjustment circuit for obtaining multi-stereo equipment.
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