Control panel 13
EMX88S/EMX68S—Owner’s Manual
■POWER AMP section
Here you can select the operating mode of the
power amp. You can also check the operation of
the limiter circuit.
MLIMITER indicator
This indicator lights up when the level of the sig-
nal output from the power amp section reaches
the maximum and the limiter is activated. Adjust
appropriate control so that the indicator lights up
for only a short while when the signal reaches the
maximum level.
NPower amp select switch
Select one of the following settings to specify the
signals to be routed to the corresponding jacks
according to the speaker connection at the
SPEAKERS jacks 1 on the rear panel.
•MAIN L-R
The stereo (MAIN L, R) bus signals are output
from the SPEAKERS A 1, 2 jacks and the SPEAK-
ERS B 1, 2 jacks. The final level of these signals is
adjusted by the MAIN MASTER control.
•MAIN (L+R)-MON
The MONITOR bus signals are output from the
SPEAKERS B 1, 2 jacks, and a monaural signal
that is a mix of the stereo (MAIN L, R) bus sig-
nals is output from the SPEAKERS A 1, 2 jacks.
The final level of these signals is adjusted by the
MAIN MASTER control and the MONITOR
MASTER control.
•MONO (BRIDGE)
The monaural signal that is a mix of the stereo
(MAIN L, R) bus is output from the BRIDGE
jack. The final level of this signal is adjusted by
the MAIN MASTER control. Set the switch to
this position when you connect only a single
speaker for high-volume amplification.
■YAMAHA SPEAKER PROCESSING
OON/OFF switch
This switch enables you to compensate the low
range of the speakers. The low range balance
when this switch is on varies depending on the
speakers.
First, check the low range balance by auditioning
the resultant sound, then set this switch to on or
off.
■STAND-BY
PON/OFF switch
This switch mutes (silences) the input signals
from channels 1–8 (EMX88S) or channels 1–6
(EMX68S). The indicator will blink when this
switch is on.
The on/off setting of this switch does not affect
the signal from the AUX IN jacks or 2TR IN
jacks.
■Power switch and indicator
QPower ON/OFF switch and indicator
This switch turns the power of the EMX88S/
EMX68S on/off. When the switch is turned on,
the indicator lights up.
Note: The indicator lights up or flashes for a
longer duration if the power amp section is sig-
nificantly overloaded, which could result in
malfunction. Avoid such a situation.

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Note: Before turning the EMX88S/EMX68S on/
off, turn down the MASTER controls of the
MONITOR and MAIN section.

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