Behringer EUROPOWER PMH660M - Manual (Page 5)

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EUROPOWER PMH660M/PMH880S
2. CONTROL ELEMENTS
The LEVEL control adjusts the channel signal level in the
main mix.
2.1.1 Input section
The CLIP LED is very useful to control the input gain. It
should never be constantly illuminated (only with signal
peaks).
The PAD switch reduces the input sensitivity of the channel
by approx. 30 dB, to connect for example line-level signals.
The balanced HI-Z input (1/4" TRS) can be used for line-
level signal sources, e.g. keyboards, electric guitars and
basses.
Each channel has a balanced LOW-Z microphone input
with XLR connectors, which also supply the +48 V phantom
power for condenser microphones (see ).
Unbalanced stereo line inputs with 1/4" connectors for
stereo channels 7 to 10 of the PMH880S. They can be
used for connecting keyboards with stereo outputs or
stereo drum machines.
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Please remember to use either the microphone or
the line input of a channel at a time, but never both
at the same time!
2.2 Effects section
List of all multi-effects presets.
LED level meter of the effects processor. Since the
PMH880S allows you to select two effects simultaneously,
it also has two level meters (DUAL FX). Be sure that the
clip LED illuminates for signal peaks only. If it is illuminated
all the time, it is a sign that the effects processor is
overloading and hence producing unpleasant distortion.
The EFFECT display (PMH880S: two displays) shows the
currently selected preset.
Turn the PROGRAM control (PMH880S: one control each
for FX 1 and FX 2) to select an effects preset (preset
number starts flashing). Push the control briefly to confirm
your selection.
Press the FX IN button (PMH880S: FX 1 IN and FX 2 IN) to
activate the effects processor.
2.3 Main and monitor section
Your power mixer is equipped with two graphic 7-band
equalizers. The upper one processes the monitor signal,
the lower one the main signal. Use the EQs to adjust the
sound to the room acoustics.
Press the FBQ IN switch to activate the FBQ Feedback
Detection System. The frequencies causing
feedback are shown by the brightly lit fader
LEDs. Simply lower the level of the respective
frequency range until feedback disappears
and the LED goes out. Your power mixer
offers this function both for the main and the monitor mix.
Turn the FX RET control to add the effect signal to the main
mix (lower) or monitor mix (upper). The PMH880S allows
you to use two effects at the same time, it also has two FX
controls each for the main and monitor mixes: when the
FX RET 1 and FX RET 2 controls are fully counter-
clockwise, no effect signal is added.
The 2TR IN control adjusts the volume of the
2 Track In signal (see ).
The MONITOR MASTER control adjusts the monitor output
volume.
Use this 5-digit LED meter to control the output level of the
monitor signal. The upper LIM LED illuminates when the
internal amp protection circuit responds to output levels
that are too high.
The MAIN MASTER control is used to adjust the main output
volume.
Use this 5-digit LED meter to control the output level of the
main signal. The PMH880S has two rows of LED meters
(L/R), because the signal is stereo. The upper LIM LED
illuminates when the internal amp protection circuit
responds to output levels that are too high.
+48V phantom power is provided for condenser
microphones. The phantom power supply is activated for
all channels with the PHANTOM switch and the PHANTOM
LED above the switch illuminates.
Use the POWER AMP switch to determine the operating
mode of your power mixer.
The PMH880S has three different operating modes: In MAIN
L/MAIN R mode it functions as a stereo amplifier, i.e. the left
and right main stereo signals are sent to OUTPUT A (L)
and OUTPUT B (R). In MON/MONO mode it functions as a
dual mono amplifier. I. e. OUTPUT A sends the monitor signal,
and OUTPUT B the main signal (mono). In BRIDGE AMP
MODE the output power of outputs A and B are added
and provided at OUTPUT B.
The PMH660M also has three operating modes, since it can
be operated in two modes with the switch in its upper position
(MAIN/MAIN (BRIDGE) mode), depending on the pin
connections of the speaker cables. In MAIN/MAIN (BRIDGE)
mode power of both outputs is added and provided at
OUTPUT B (SPEAKON ® cable, pins 1+/2+). With the normal
pin connections (SPEAKON ® cable, pins 1+/1-) a main signal
is provided in this mode at OUTPUT A and B (not bridged). In
MON/MAIN mode, the mixer can also be used as a dual
mono amplifier, i.e. OUTPUT A provides the monitor signal,
while the main signal is present at OUTPUT B.
Please refer to
and as well as chapter 4.4
“Loudspeaker connectors”.
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In BRIDGE mode, always connect only one loudspeaker
with an impedance of at least 8 W to OUTPUT B (pins
1+/2+)! Please note that OUTPUT A must NEVER be
used in BRIDGE mode (with pin connections 1+/2+)!
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In all other operating modes, the minimum
impedance of the speaker connected must not fall
below 4 Ω .
Use the SPEAKER PROCESSING switch to activate a filter
that adapts the mixer to the specifications of your
loudspeakers. If the speakers have a limited frequency
response in the bass range, it allows you to adapt it optimally
to the frequency response of the speakers.