Power Amp Section - Yamaha EMX640 Owner's Manual

POWER AMP section

This section allows you to select the signals that
will be output from the built-in two-channel
power amplifier, and to select the BRIDGE mode.
I
1
LIMITER
MAIN
BRIDGE
MAIN
MAIN
POWER AMP
I
LIMITER 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.
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.
J
Power amp select switch
Select one of the following three settings to spec-
ify the signals that will be output from power
amp 1/2.
• MAIN-MONITOR
With this setting, the MAIN and MONITOR sec-
tions can be used independently. The MAIN bus
signal will be output from the POWER AMP 1 A/
B jacks, and the MONITOR bus signal will be
output from the POWER AMP 2 A/B jacks.
• MAIN-MAIN
With this setting, the two power amp channels
can be used independently. The MAIN bus signal
will be output from the POWER AMP 1 A/B jacks
and from the POWER AMP 2 A/B jacks.
• MAIN BRIDGE
With this setting, the two power amp channels (A
and B) will be bridge connected. Only the MAIN
bus signal will be output from the BRIDGE jack,
though.
2
MAIN
MONITOR
J
POWER indicator & PHANTOM
switch
K
POWER
ON
PHANTOM +48V
OFF
L
K
POWER indicator
This indicator will light when the power of the
EMX640 is turned on.
L
PHANTOM +48 V switch
This switch turns the phantom power supply on/
off for the Lo-Z input jacks of channels 1~4 and
MIC input jacks of channels 5~6.
5
Control panel
EMX640—Owner's Manual