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ALLEN & HEATH GL4000 User Guide

ALLEN & HEATH GL4000
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25
LAMP CONNECTORS - Two top panel 4-pin XLR
connectors are provided for connection to gooseneck lamps.
It is recommended that these are the standard 12V 2.5 watt
type.
THE CONSOLE MONITOR - The GL4000 offers a
comprehensive signal monitoring system. Apart from the
extensive metering facilities there is a monitor section which
operates independently of the main outputs.
PFL TRIM - Adjust the trim control for the most comfortable
listening balance between AFL and PFL levels in the
headphones, local monitor or listen wedge. It is typical that
the AFL levels are generally quieter than PFL in live sound
mixing due to the fader settings in the mix. Normal level is
indicated at the centre detented '0' mark. You can reduce the
listening level by up to 12dB, or boost it by up to 6dB.
Adjusting the trim does not affect the PFL meter readings
which always display the actual signal level.
HEADPHONES MONITOR - You can plug in up to two
headphone sets, one on the top panel and the other safely
protected under the armrest. The headphone monitor has
its own PHONES LEV volume control.
LOCAL MONITOR - A separate stereo monitor output is
provided for connection to a local amplifier/speaker monitor
system. This is usually positioned on or near the console so
that the engineer can monitor the signals on speakers rather
than headphones. The volume is independently controlled
using LOCAL LEV. The local monitor doubles as a studio
monitor in the recording environment.
L-R MIX - Press this switch to listen to the post fader LR
main mix. In live sound mixing it is often preferred to turn off
the LR monitoring until required. This prevents distracting
audio spill from the headphones or local monitor. Of course,
pressing any AFL or PFL activates the monitors as normal.
STEREO/MONO - Press this switch to listen to the selected
monitor source in mono (L+R sum). This can help identify
problems with the mono/stereo compatibility of the signal.

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ALLEN & HEATH GL4000 Specifications

General IconGeneral
TypeAnalog Mixing Console
Groups8
Faders100mm
Frequency Response20Hz - 20kHz
Channels40
Mic/Line Inputs40
EQ4-band with 2 sweepable mids
Direct OutputsYes
Phantom PowerYes
MeteringLED
Total Harmonic Distortion< 0.005% at 1kHz
Noise (EIN)-128dB
DimensionsVaries depending on frame size. e.g., 40 channel: 1367mm (W) x 724mm (D) x 223mm (H)

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