Allen&Heath ML3000 USER GUIDE - Manual (Page 40)

40 ML3000 User Guide
TALKBACK
Using Talkback
Talkback lets the operator talk to one or more
console outputs, for example to communicate with
performers on stage through their monitor speakers
or make a public announcement through the main
mix.
Plug in the talkback microphone. Select +48V if it
needs phantom power. Start with the TRIM control
turned down. Enable talkback to the required
output by selecting its TB switch. The TALK switch
green LED turns on. Check that the output faders
and levels are set to their normal operating position.
Now press the large TALK TO TB switch and talk
into the microphone. Adjust the TRIM control for
the required volume. The console monitor level is
automatically dimmed to avoid acoustic feedback
and aid intelligibility. To avoid accidentally routing
talkback where it is not wanted you should release
the TB enable switches when finished.
If you do not need to use talkback you can release
all the TB enable switches and use TALK TO TB as
a monitor dim function, for example when talking to
someone at the console, or to dim the pink noise
signal when testing speakers.
MIC INPUT. Top panel 3-pin XLR female socket
for plugging in gooseneck microphone for the
console talkback system. The input is balanced.
+48V. Press this underpanel switch to assign
+48V to the XLR for microphones that require
phantom power.
To avoid loud clicks do not press the TALK TO TB
switch while you are switching phantom power on or
off, or plugging or unplugging the microphone.
TALKBACK TRIM. Adjusts the sensitivity of the
input to match the connected talkback microphone.
The range is +5dB to +50dB gain.
TB TO LR. Press this to enable talkback to the
main LR output. When selected, pressing the TALK
TO TB switch routes the talkback mic signal, or
pressing the OSC/NOISE TO TB switch routes the
oscillator/noise generator signal to the output.
When not selected, pressing these switches does
not affect the output. The talkback and osc/noise
signals are routed into the mix pre master level.
TB TO C. This is similar to the switch described
above but enables talkback to the main C output.
TALK TO TB. Press this momentary switch to talk
to all output destinations which have their TB
switches selected. The green switch LED lights
when one or more TB switches are selected to warn
that the signal will be routed to an output when
TALK is pressed. If no TB switches are selected
the LED remains off.
The microphone is turned on when the switch is
pressed and turned off as soon as it is released.
Pressing TALK automatically dims the console
headphones, local monitor and engineers wedge
monitor by 20dB.
TALK
TO TB
TB TO LR
TB TO C
max min
+48V
TRIM
TALKBACK
MIC IN