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Yamaha VR4000 stereo Operation Manual page 6

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© REAR PANEL
U.S. & Canadian models
SPEAKER QUT
MAUT-PAUREURS
IT
VR6000
fame
Ol
VR6000
Q9 CHANNEL MODE Switch
The CHANNEL
MODE switch selects the amplifi-
ers operational mode: "A or B" for selectable op-
eration of either the A channel or B channel alone,
or "A/B" for simultaneous operation of both the A
and
B channels.
Always
turn
the
amplifier's
POWER switch OFF when changing the setting of
this switch.
* Refer to "CONNECTING
INSTRUMENTS"
оп
page 6 for more information.
SP OUT Jacks
Normally, the amplifier's internal L and R speakers
are connected to these jacks. It is possible, how-
ever, to unplug
the internal speakers and connect
external speakers
to these jacks. In this case,
make sure the system impedance of each external
speaker connected
to the SP OUT jacks is 8
ohms, and that the speakers can handle the full
power output of the amplifier.
LINE OUT Jacks
These jacks deliver a line-level output signal from
the left and right channels of the amplifier for con-
nection to a mixing console, an external power
amplifier system or other line-level equipment. The
signal delivered to these jacks is the same as that
delivered to the internal L and R speakers. The
effect of the internal chorus system
or external
stereo
signal
processors
is
delivered
to these
jacks in full stereo.
The tate output level of the LINE OUT jacks is
Voltage Selector
(General model only)
© MONO SND — ST RTN LOOP Jacks
These jacks are ideally suited for connection to an
external signal processor with a single input and
stereo outputs. The SEND MONO jack should be
connected to the input of the external signal proc-
essor, and the stereo outputs from the signal proc-
essor should be connected to the L and R RTN
jacks. When the outputs from the signal processor
are plugged into the amplifiers RTN jacks, the
signal processor
is effectively inserted into the
amplifier's signal path.
Rated input and output level for these jacks is +4
dB.
ST SEND — ST RTN LOOP Jacks
These jacks are suited for connection to an exter-
nal signal processor with stereo inputs and out-
puts. The SEND
L and R jacks should be con-
nected to the inputs of the external signal proces-
sor, and the stereo outputs from the signal proces-
sor should be connected to the | and R RTN
jacks. When the outputs from the signal processor
are plugged into the amplifiers RTN jacks, the
signal processor
is effectively inserted into the
amplifier's signal path.
Rated input and output level for these jacks is +4
dB.
* The circuit positions of the effect loops in relation
to the amplifier's internal effect processors are as
shown below. Refer to the "BLOCK DIAGRAM"
on page 10 for more details.
ineo
External
External
|
ER
Input
«processor
+| Internal chorus | 4processor
+ Internal reverb | +
connected to)
(connected юФ|
!
Interna! геуего
Ф AC OUTLET (UNSWITCHED) (U.S. & Canadian
models only)
Other equipment with a total power consumption
of no more than 250 watts can be powered from
this AC outlet.
9 FUSE
If the fuse blows and needs replacing, first unplug
the AC power cord and then replace the fuse with
a new one of exactly the same type and power rat-
ing.
If the fuse blows again immediately after replace-
ment, there may be a fault in the amplifier's cir-
cuitry. If this happens, have the amplifier checked
by qualified Yamaha service personnel.
Ө GROUND Switch (U.S. & Canadian models only)
This switch reverses the ground polarity of the AC
power line. Set it to the position in which you hear
the least hum and noise from the amplifier.

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