User Manual

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M 20 Allen & Heath
Monitoring many mixes The GL2800
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AFL monitoring system so you can check the stage wedge mixes in
your own floor wedge, and check the in-ear mixes using your own IEM
system or the console headphones. Before starting, decide which
mixes are to feed each type of monitor and then configure the
GLOBAL SETTINGS switches accordingly.
A quick and easy IEM monitor If you do not have a
dedicated engineer’s IEM system then simply select the headphones
FOLLOW IEM switch so that the console headphones output may be
used instead. In this mode the headphones follows the engineer’s
IEM monitor master fader. A 3.5mm socket is provided in addition to
the two standard ¼” sockets, ideal for plugging in the typical ear
pieces used.
Communicating with the performers Use the built-in
talkback system to talk to individual or combinations of performers
through their monitors. You may find it more convenient to use a
switched, hand held microphone. In this case select the recessed
LATCH mode switch to bypass the console TALK switch.
Communicating with the FOH engineer Use the external
TB/OSC output to connect via the multicore to an input on the FOH
console. Press the EXT TB switch to enable talkback to this output.
The FOH engineer can route that channel or select PFL to his monitor
when communication is needed. For reverse communication the FOH
engineer can send a line level talkback signal from the FOH console
via the multicore to the GL28
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EXT ON switch and adjust the level to listen to the FOH signal in your
wedge when needed. The same talkback return is routed to the IEM
monitor when nothing is plugged into its TRS jack inputs.
Using the mute groups Use these to mute combinations of
input channels, for example those associated with different bands
playing in a festival. We recommend you set up one group to mute all
inputs. This provides a quick way to turn the mix off during
intermission or while you replug microphones on stage.
Turning the system on and off It is good practice to:
• Turn the amplifiers on last and off first.
• Mute channels before plugging cables, unplugging
instruments and switching phantom power.
• Let equipment which has been stored in a damp or cold
place acclimatise in the venue first before powering it up.
• Power up the system in plenty of time before you start the
sound check or show.
Sound levels The ear is a delicate instrument. Do not subject
yourself or the performers to long periods of loud sound, particularly
with extreme equalisation. This may result in frequency selective or
full range hearing loss. Ensure that any closed ear personal monitor
systems in use have adequate protection limiting. This may be built
into the monitor system, or it may be necessary to patch outboard
limiters into the IEM mix inserts. Adhere to the sound level regulations
which may apply to the venue… and common sense!
Think before you hit
the switch!
TALKBACK MIC
MAXMIN
TALKBACK
LATCH
TALK
1kHz OSC
PINK NOISE
ON
MAXMIN
OSC/NOISE
EXT TB
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IN
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