Allen&Heath GL2200 USER GUIDE
ALLEN&HEATH
GL2200
Dual Function Audio Mixing Console
USER GUIDE
PUBLICATION: AP3388
LIMITED ONE YEAR WARRANTY
This product has been manufactured in the UK by ALLEN & HEATH and
is warranted to be free from defects in materials or workmanship for
period of one year from the date of purchase by the original owner.
To ensure a high level of performance and reliability for which this
equipment has been designed and manufactured, read this User Guide
before operating.
In the event of a failure, notify and return the defective unit to ALLEN &
HEATH or its authorised agent as soon as possible for repair under
warranty subject to the following conditions:
CONDITIONS OF WARRANTY
1. The equipment has been installed and operated in accordance with
the instructions in this User Guide.
2. The equipment has not been subject to misuse either intended or
accidental, neglect, or alteration other than as described in the User
Guide or Service Manual, or approved by ALLEN & HEATH.
3. Any necessary adjustment, alteration or repair has been carried out by
ALLEN & HEATH or its authorised agent.
4. The defective unit is to be returned carriage prepaid to ALLEN &
HEATH or its authorised agent with proof of purchase.
5. Units returned should be packed to avoid transit damage.
These terms of warranty apply to UK sales. In other territories the terms
may vary according to legal requirements. Check with your ALLEN &
HEATH agent for any additional warranty which may apply.
GL2200 User Guide AP3388 Issue 5. Copyright © 2004 Allen & Heath Limited. All rights reserved
This product complies with the European Electromagnetic Compatibility
Directives 89/336/EEC & 92/31EEC and the European Low Voltage Directives
73/23/EEC & 93/68 EEC
MANUFACTURED IN ENGLAND BY:
Allen & Heath Limited
Kernick Industrial Estate
Penryn, Cornwall, TR10 9LU. UK
http://www.allen-heath.com
ALLEN&HEATH
CONTENTS
CONTENTS ..................................................................................................... 3
INTRODUCTION, SERVICE, SAFETY & PRECAUTIONS .......................................... 4
KEY FEATURES, THE RANGE & OPTIONS ...........................................................5
CONNECTING POWER TO THE CONSOLE ............................................................ 6-7
EARTHING THE AUDIO SYSTEM ......................................................................... 7
PLUGGING UP THE CABLES...............................................................................8-9
ADJUSTING THE LEVELS...................................................................................9
FLIGHTCASING THE CONSOLE ...........................................................................10
MONO INPUT CHANNEL ................................................................................... 11-12
STEREO INPUT CHANNEL.................................................................................13-14
STEREO RETURNS & AUX MASTER OUTPUTS ................................................... 15
GROUP OUTPUTS ........................................................................................... 16
MODE SWITCHING........................................................................................... 17
MASTER & MONITOR ....................................................................................... 18
OSCILLATOR/PINK NOISE & TALKBACK ............................................................. 19
APPLICATION – FRONT OF HOUSE.................................................................... 20
APPLICATION – STAGE MONITOR...................................................................... 21
APPLICATION – DUAL MODE............................................................................ 22
FRONT PANEL LAYOUT .................................................................................... 23
REAR PANEL LAYOUT / SPECIFICATIONS & CONNECTIONS..................................24
INTERNAL LINK OPTIONS ................................................................................. 25
UE SHEETS ..................................................................................................26-27
C
GL2200 BLOCK DIAGRAM ............................................................................... COVER
GL2200 USER GUIDE
3
INTRODUCTION
The GL2200 continues ALLEN & HEATH’s commitment to provide high quality audio mixing consoles
engineered to meet the exacting requirements of today’s audio business. It brings you the latest in
high performance technology and offers the reassurance of over two decades of console manufacture
and customer support.
This user guide presents a quick reference to the function, application and installation of the GL2200.
We recommend that you read this guide fully before operating the console For further information on
the basic principles of audio system engineering please refer to one of the specialist publications
available from bookshops and audio equipment dealers.
Whilst we believe the information in this guide to be reliable we do not assume responsibility for any
inaccuracies. We also reserve the right to make changes in the interest of further product
development.
SERVICE AND TECHNICAL SUPPORT
Under normal conditions the GL2200 does not require user maintenance or internal calibration. Any
service work required should be carried out by qualified service personnel only.
We are able to offer further product support through our world-wide network of approved dealers and
service agents. You can also access our Web site on the internet for information on our product
range, assistance with your technical queries or simply to chat about audio matters. To help us
provide the most efficient service please keep a record of the console serial number, and date and
place of purchase to be quoted in any communication regarding this product.
SAFETY WARNING!
Mains electricity is dangerous and can kill. Mains voltage
is present within the console power supply.
Do not remove the power supply cover with mains
electricity connected. To ensure your safety, mains earth
is connected to the chassis through the power lead. Do
not remove this mains earth connection.
To avoid the risk of fire, replace the mains fuse only with
the correct value and type as indicated on the power
supply unit.
GENERAL PRECAUTIONS
Your GL2200 is ruggedly constructed to give many years of reliable operation. However, you will
extend the life of the console and preserve its cosmetics by applying these simple common sense
precautions.
• Avoid storing or using the mixing console in conditions of excessive heat or cold, or in positions
where it is likely to be subject to vibration, dust, dirt or moisture.
• Do not use any liquids to clean the control surface of the console, a soft dry brush or dry lint-free
cloth is ideal.
• Use only water or ethyl alcohol to clean the trim and scribble strips. Other solvents may cause
damage to paint or plastic parts.
• The faders, switches and potentiometers are lubricated for life. The use of electrical lubricants on
these parts is not recommended.
• Avoid using the console close to strong sources of electromagnetic radiation (e.g. video monitors,
high power electric cabling): this may cause degradation of the audio quality due to induced
voltages in connecting leads and chassis. For the same reason, always site any external power
supply away from the unit.
4
GL2200 USER GUIDE
KEY FEATURES OF THE GL2200
The ALLEN & HEATH GL2200 offers the user the versatility to quickly adapt to the exacting demands
of live sound engineering today. The GL2200 is developed from the very successful GL2000 console,
which included mode switching to quickly convert the console from Front-of-House to On-stage
Monitor operation. In addition, the GL2200 includes 4 subgroups, 6 independent aux sends, stereo
mic/line channels, pink noise generator, 1kHz oscillator and lots more. It is built on the established
tradition of innovative British design and manufacture. The GL2200 is equally suited to home and
studio recording. Features include:
• FOH/stage-monitor dual functionality
• 4 groups, 6 auxes
• Groups, L, R and Mono outputs on balanced XLR
• 12, 16, 24 and 32 channel frames
• 2 stereo line channels with mic capability
• 2 stereo returns with mutes, faders, EQ and Aux sends
• Mutes on Groups and L-R
• Channel direct outs
• 2-track send and return
• 4-band EQ with swept mids and in/out switch
• Input metering on each channel
• Phantom Power 48V, switchable on each channel
• Inserts on all mono inputs
• Inserts on Groups (auxes) and L-R outs
• Comprehensive AFL/PFL monitoring
• Pink noise generator for speaker setup
• Oscillator for equipment line up
• Talkback facility
• High-performance internal power supply with universal mains input voltage
• Built-in combiner to add external backup power supply
• Console lamp connector
TM
• Sys-link
• Rugged build quality
The console is constructed using zinc plated steel panels and 1.6mm thick metal side plates.
Individual circuit board assemblies are accessible by removal of the steel base. A durable soft front
armrest is provided for comfort. A channel top write-on strip is provided for channel marking. High
quality reliable parts are used throughout. High performance op-amp and discrete circuits are used to
ensure low noise and sonic purity. The internal power supply is a low noise switch mode unit that can
be linked with an external DC power supply.
expandability
THE RANGE
12, 16, 24 and 32 channel models
GL2200-412
GL2200-416
GL2200-424
GL2200-432
10 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L, R, Mono sum
14 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L, R, Mono sum
22 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L, R, Mono sum
30 mono, 2 stereo, 4 groups, 6 aux, 2 stereo returns, L, R, Mono sum
OPTIONS
GL2200-SL1
RPS11-3C
002-225
Sys-link buss expander, one kit per console
3U rack mount power supply for backup
RPS11 to GL2200 DC cable assembly
GL2200 USER GUIDE
5
B
A
S
g
y
CONNECTING POWER TO THE CONSOLE
Refer to the SAFETY WARNING on page 4 of this User Guide. Read and understand the warnings
and instructions printed on the rear panel of the console and printed here.
Ensure adequate ventilation around the console. Do not cover the
console or position it on soft furnishin
The console must be connected to 0V ground by either the a.c.
mains input cable or by the EXTERNAL DC IN cable.
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE
WITH SAME TYPE AND RATING.
ATTENTION: REMPLACER LE FUSI BLE AVEC UN DES MEMES CARACTERISTIQUES.
WARNING: DISCONNECT SUPPLY BEFORE CHANGING FUSE.
ATTENTION: COUPER L'ALIMENTATION AVANT DE CHANGER LE FUSIBLE.
s during operation.
WARNING: TO REDUC
SEE INST
DO NOT O
NO USER
EXTERNAL SUPPLY INTERNAL SUPPLY
ACTIVE ACTIVE
100 - 240V~
WARNING - THIS APPARATUS MUST BE EARTHED.
T1A 250V 20mm
SUPPLY VOLTAGE RANGE:
100 - 240V.AC
47-63Hz ~ 60W MAX
The GL2200 console can be powered from either the internal power supply, from an external
DC supply such as the Allen & Heath RPS11, or both together. The LED indicators on the rear
panel illuminate to indicate which supply is active.
Normally the internal power supply will be used to power the console by the standard 3 pin IEC
mains input connector. A mains cable with moulded mains plug suitable for the local supply is
supplied. Check that the correct mains lead with moulded plug has been supplied with your
console. Ensure that the IEC mains plug is fully inserted into the rear panel socket before
switching on.
POWER SUPPLY
The internal power supply for the GL2200 is a switch mode supply and will operate from a wide
range of mains input voltages. It produces the DC voltages required by the console. Before
switching on your console, check that the ac mains fuse is of the correct type and rating. This is
clearly marked on the rear panel of the console. Do not replace the fuse with any other type, as
this could become a safety hazard and will void the warranty.
AC~ mains input voltage Fuse value
100 - 230V ±10% T 1A 250V 20mm
CAUTION: For continued protection against the risk of fire, replace
fuse onl
with the correct type and value.
The console power supply unit contains no user serviceable parts.
Do not remove the cover. Refer servicing to qualified service
personnel only.
6
GL2200 USER GUIDE
An external DC supply may be used instead of, or together with the internal supply. Use only
recommended Allen & Heath power supplies or a supply approved by Allen & Heath. The use of
alternative supplies is not recommended and may cause damage.
The pin connections for the EXTERNAL DC IN connector are specified below:
In the absence of an active 100V to 230V a.c. mains supply, the GL2200 will automatically switch over
to the external DC supply unit if connected.
Always turn connected power amplifiers down or off before switching the console on or off.
In the event of an electrical storm, or large mains voltage
fluctuations, immediately switch off and disconnect all power to the
console.
Pin Voltage Current
1 -16V 1.5A
2 Audio 0V
3 Chassis 0V
4 +16V 1.5A
5 +48V 0.1A
EARTHING THE AUDIO SYSTEM
The console chassis is connected to mains earth via the power cable. Audio 0V is connected
internally to the chassis and therefore mains earth. In this way all signal returns and connector shields
are connected to mains earth at the console.
To ensure safety, do not remove the earth connection from the AC
mains plug or from EXTERNAL DC IN cable.
For best performance it is important that the earth system is solid, clean and noise-free. To prevent
mains-borne and external interference pickup from lighting equipment, motors and other mains
powered equipment it is recommended that a separate ‘clean’ mains distribution outlet is used for the
audio system.
All signal cables should have their screens connected to earth at the connector. If earth (ground) loop
problems result in audible hum or buzz then disconnect the cable screen connection at one end,
usually the destination end. This may be done within the cable plug or by operating the ‘ground lift’
switch if available on the connected equipment. Many DI boxes and power amplifiers include this
facility.
GL2200 USER GUIDE
7
PLUGGING UP THE CABLES
p
The GL2200 uses professional grade 3-pin XLR, 1/4" TRS jack and RCA PHONO sockets.
Where possible use balanced connections to prevent noise and interference pickup especially
on long cable runs. Avoid running audio cables next to AC mains, computer or lighting cables,
near thyristor dimmer units or power supplies etc. The use of low impedance sources such as
good quality microphones of 200 ohms or less significantly reduces interference pickup. Many
problems can be avoided by taking time to check that all cables are correctly wired. Avoid
reversing + and - on balanced connections as this will result in out of phase signals (reverse
polarity) causing signal cancellation effects. This situation is particularly common in multimicrophone mixing. Use professional quality cable and carefully soldered connections. The
following wiring convention is used:
CABLE WIRING
BALANCED
UNBALANCED
XLR
Pin 1 0V earth shield
Pin 2 + / hot / signal
Pin 3 - / cold
Tip
Ring
S
R
le
T
in
e
ip
v
g
e
¼" 3-POLE (STEREO) JACK PLUG
S
le
T
e
ip
v
e
¼" 2-POLE (MONO) JACK PLUG
Sleeve
Tip
Sleeve
TWIN SCREENED CABLE
SINGLE SCREENED CABLE
¼” TRS jack
Tip + / hot / signal / left / send
Ring - / cold / 0V / right / return
Sleeve 0V earth shield
1
OUTPUT
3-PIN XLR FEMALE PLUG
INPUT
3-PIN XLR MALE PLUG
OUTPUT
3-PIN XLR FEMALE PLUG
INPUT
3-PIN XLR MALE PLUG
3
2
CONSOLE
CONNECTIONS
2
3
1
1
3
Link
2
CONSOLE
2
3
1
CONNECTIONS
Sleeve
Ring
OUTPUT
CONSOLE
CONNECTIONS
UNBALANCED
SINGLE SCREENED CABLE
Link
Tip
e
g
v
ip
e
in
T
le
R
S
INPUT
¼" 3-POLE (STEREO) JACK PLUGRCA PHONO PLUG
To connect an unbalanced source to a balanced console input, link the cold input (XLR pin 3 or
jack ring) to 0V earth (pin 1 or jack sleeve) at the console. To connect a balanced console
output to an unbalanced destination link the cold output to 0V earth at the console.
Deselect input channel +48V when inputs are connected to non-phantom
owered, mic, line or unbalanced sources.
8
GL2200 USER GUIDE
CONNECTING CHANNEL INPUTS
Both microphone and line sources such as keyboards, replay devices and effects processors
can be plugged into either the jack or XLR input for convenience. The channel accepts a wide
70dB range of source levels. The balanced 3-wire input provides the best immunity to
interference pickup on long cable runs.
CONNECTING TO INSERTS
You do not need to plug anything into the insert socket for normal operation. You may, however
wish to insert a signal processor such as a compressor/limiter or noise gate into the signal path
to prevent excessive peaks or to cut down source noise. The insert lets you do this by breaking
the signal path after the input pre-amp and before the EQ in the channel input or before the
fader in the Group and L-R section. Use a Y-lead or suitable TRS jack lead to connect to the
external processor. The insert operates at 0dBu line level in the channel input and –2dBu in the
Group and L-R section. Adjust the processor input and output levels for optimum signal level.
CHANNEL DIRECT OUTPUTS
The channel direct output taps the signal off post-fader (pre-fader if the internal link option is
changed) for connection to external processing or recording equipment. This is ideal for
multitrack recording during a live performance. Here each channel can be recorded on a
separate track for mixdown later. The output is impedance balanced on TRS jack. This means
that you get the benefit of interference immunity when connecting to outboard equipment with
balanced inputs. You can, of course, also connect to unbalanced equipment. The signal
operates at nominal 0dBu line level.
ADJUSTING THE LEVELS
For best performance it is important that the connected source signals are matched to the “normal
operating level” of the console. Similarly the console outputs should be correctly matched to the
operating levels of the connected amplifiers and destination equipment. If too high, the signal peaks
will be clipped resulting in a harsh distorted sound, and if too low, the signal-to-noise ratio is reduced
resulting in excessive background hiss.
For best results, operate the console with the meters averaging ‘0’ or just below and allowing the
loudest passages and occasional peaks into the ‘yellow’. Reduce the gain if the peak indicators flash
(red). The GL2200 provides +4dBu output level at the XLR outputs for a meter reading of 0VU. It is
advisable to adjust the power amplifier input gain or fit an attenuator pad if normal console operation
results in an output level too high for the connected amplifier. Normal operation should give rise to
fader levels around the ‘0’ mark.
The GL2200 has an advanced PFL (pre-fade listen) / AFL (after-fader listen) and channel metering
system to let you listen to and check the level of signals at different points in the signal path without
affecting the main outputs. Use the channel PFL switches to set up the input GAIN controls to read an
average ‘0’ (yellow LED). Signal activity is always shown on the channel meters regardless of fader
position. The green ‘SIG’ LED lights at -20dBu to indicate signal presence, the yellow ‘0’ LED
indicates normal level, and the red ‘PEAK’ LED warns of potential overload 5dB before clipping.
GL2200 USER GUIDE
9
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