ALLEN & HEATH GL3300 User manual

PUBLICATION AP3102
DUAL FUNCTION
AUDIO MIXING CONSOLE
USER
GUIDE

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LIMITED ONE YEAR WARRANTY
ThisproducthasbeenmanufacturedintheUKbyALLEN&HEATHandiswarranted
to be free from defects in materials or workmanship for a period of one year from the
date of purchase by the original owner.
To ensure the high level of performance and reliability for which this equipment has
been designed and manufactured please read this User Guide before use.
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 the
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 made 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 to be 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.
copyright © 1997 ALLEN & HEATH. All rights reserved Publication .....................AP3102 Issue 1
A DIVISION OF HARMAN INTERNATIONAL INDUSTRIES Ltd.
Manufactured In England
ALLEN & HEATH
Kernick Industrial Estate,
Penryn, Cornwall, TR10 9LU, UK
http://www.allen-heath.com
Allen & Heath agent:
This product complies with the European
Electromagnetic Compatibility Directives 89/336/
EEC & 92/31/EEC and the European Low Voltage
Directives 73/23/EEC & 93/68/EEC.

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PRECAUTIONS.
ll AC POWER: Check the power unit for correct AC mains voltage setting before switching on.
Allow adequate space around the unit for ventilation.
ll CONNECTIONS: Use audio connectors and cables only for their intended purpose. Do not
connect any source of AC or DC power to the console audio connectors. Do not
connect the output of power amplifiers directly to the console.
ll CLEANING: Avoid the use of chemicals, abrasives and solvents. The control panel is best
cleaned with a soft brush and lint-free cloth. To remove stubborn marks (such
as chinagraph pencil) isopropyl alcohol may be used.
ll LUBRICATION: The faders, switches and potentiometers are lubricated for life. The use of
electrical lubricants on these parts is not recommended.
ll DIRT, DUST, SMOKE and MOISTURE: Prevent damage to the moving parts, such as faders
and potentiometers, and cosmetics by avoiding drinks spill age, tobacco ash and
smoke, and exposure to rain and condensation. Protect from excessive dirt,
dust, heat and vibration.
INTRODUCTION
The GL3300 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 GL3300. 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
inaccuracies. We also reserve the right to make changes in the interest of further product development.
SERVICE AND TECHNICAL SUPPORT
Under normal conditions the GL3300 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 worldwide network of approved dealers and
service agents. 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.
Mains electricity is dangerous and can kill. Mains voltage is present within the
powersupplyunitprovidedwiththeconsole.Donotremovethe powerunitcoverwith
mains connected. The correct mains voltage setting is indicated on the rear of the
power unit. Check your mains wiring and earthing before switching on.
DO NOT REMOVE THE MAINS EARTH CONNECTION!
The console chassis is connected to mains earth to ensure your safety.Audio
0Vconnectstotheconsolechassisinternally. Shouldproblemsbeencounteredwith
ground loops operate the audio ground lift switches on connected equipment
accordingly or disconnect the cable screens at one end. Refer to the section on
'EARTHING' later in this User Guide.
SAFETY WARNING

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INSTALLING THE POWER SUPPLY UNIT
Refer to the SAFETY WARNING on the first page of this User Guide.
The RPS9 power supply unit conforms to safety standard EN 60065
AC mains supply = 100 to 110 V.AC 100 T 3.15A 20mm fuse
AC mains supply = 110 to 125 V.AC 120 T 3.15A 20mm fuse
AC mains supply = 210 to 230 V.AC 230 T 1A 20mm fuse
AC mains supply = 235 to 260 V.AC 240 T 1A 20mm fuse
Checkthatthevoltageindicatedinthefuseholderwindowisthe
same as the mains supply in your area.
To avoid the risk of fire replace the fuse only with the correct
type and value as specified on the unit.
It is normal for the power unit to dissipate heat. Ensure adequate
ventilation around the unit. Do not cover the unit or position it on
soft furnishings during operation. Do not position other equipment
known to generate significant amounts of heat below the unit. It is
recommended that rack units containing high power amplifiers and
other heat dissipating equipment are fitted with cooling fans.
Always switch the power unit off before connecting or
disconnecting the console power cable.
Thisunitcontainsnouserserviceableparts. Donotremovethe
cover. Refer servicing to qualified service personnel only.
Note: The RPS9 is fitted with a rear panel ground lift switch. This is for use when the unit powers certain
other Allen & Heath equipment. This switch is not operative on the GL3300 range. Refer to the section
on 'EARTHING THE AUDIO SYSTEM'.
The RPS9 Power supply is provided with the GL3300 to convert the AC mains voltage to the regulated
positive and negative DC voltages required to power the console. It also supplies the +48V DC phantom
power voltage for use with certain microphones. It connects to the console by means of a 2.5 metre DC
power cable fitted with a locking 5 pin XLR plug. Mains input to the RPS9 is via a mains cable with
moulded plug suitable for the local supply. A standard 3 pin IEC connector plugs into the RPS9 mains in
socket with integral voltage selector and AC mains fuse.
The RPS9 may be operated free standing or 19" rack mounted (2U height) up to 2 metres away from the
console. As with any power supply unit it is recommended that it is positioned away from the console or
other signal processing equipment containing sensitive low level audio signals to avoid any possible hum
pickup.

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EARTHING THE AUDIO SYSTEM
The console chassis is connected to mains earth via the DC power cable. Audio 0V is connected 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 operator safety do not remove the earth connection
from the power supply mains plug.
For best performance it is important that the earth system is solid, clean and noise-free. To prevent mains
born 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.
PLUGGING UP THE CABLES
Where possible use balanced connections to prevent noise and interference pickup especially on long
microphone cable runs. Avoid running audio cables next to mains, computer or lighting cables, or near
thyristor dimmer units, 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 (in-phase) with professional quality cable and
carefully soldered joints. The following wiring convention is used:
Switch off the input channel +48V when using non-phantom
powered, line or unbalanced sources.
F
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 occassional peaks into the 'yellow'. Reduce the gain if the peak indicators flash (red). The
GL3300 produces a standard XLR output level of +4dBu for a meter reading of 0VU. It is advisable to
adjustthepoweramplifierinputgain or fit anattenuatorpadifnormalconsole operation resultsinanoutput
level too high for the connected amplifier. Normal operation should result in fader levels around the '0'
mark.
The GL3300 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 mute
switch position. The green 'SIG' LED lights at -20dBu to indicate signal presence, the green '0' LED
indicates normal level, and the red 'PEAK' LED warns of potential overload 5dB before clipping.
XLR pin 1 = 0V earth shield
pin 2 = hot (+ve - in phase signal)
pin 3 = cold (-ve - out of phase signal)
1/4" jack tip = hot / +ve/signal / left / send
ring = cold /-ve/ 0V / right/ return
sleeve = 0V earth shield
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.

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üEasy to use intuitive layout.
ü16, 24, 32 and 40 channel frames each with 4 Mono / Stereo input module combinations.
üMono and stereo channel bolt-on expanders available to extend up to a maximum 40 channels.
üSeparate safety approved power supply unit.
üü SYS-LINK buss expander option.
üVU meterpod option for 24, 32 and 40 models.
ü4 assignable mute groups for combined channel control.
üL, R outputs on balanced XLR with inserts.
üMono sum output on balanced XLR with mode switching to 'listen wedge' monitor.
ü8 subgroups, with 4 available outputs on balanced XLR with inserts.
üAll 8 group outputs available on 25pin D connector as an option.
üL-R, mute and pan on each subgroup.
ü2 matrix outputs on faders fed from L, R, 8 subgroups and stereo returns.
ü8 aux sends, 4 on jack, 4 on balanced XLR outputs with inserts.
üMode switching to convert console to on-stage monitor status with 8 mono and 1 stereo sends.
ü2 stereo returns with faders and routing.
ü2-track record and replay with level controls.
üIndividual talkback to all aux sends.
üExtensivemonitoringandmeteringfacilities
üGooseneck lamp connector.
üAdvanced channel features including +48V, phase switch, lo-cut filter, meter and insert.
üDirect output on mono channels.
ü4 band 2 sweep EQ with wide ranging frequency sweep and +/-15dB boost/cut.
üPre-post aux switching with additional internal link options.
üStereo mic/line channels with XLR/Jack inputs and inserts.
üHigh performance circuitry used for low noise and sonic purity.
üHigh quality, proven reliable parts used throughout.
üRear mounted connectors, comfortable soft armrest, wide write-on strips.
üRugged metal beam construction for on-the-road rigidity, easily flightcased and transported.
üRemoveable steel base for easy access to individual circuit assemblies.
FEATURES
TheALLEN & HEATHGL3300represents a breakthroughinpriceversus performance andfunctionality.
It offers the professional user a new level of versatility to quickly adapt to the exacting demands of live
sound engineering today. The GL3300 is developed from the successful GL3000 console which included
innovative 'mode switching' that quickly converts the console from Front-of-House to On-stage Monitor
operation. Apart from continuing the development of this unique feature, the GL3300 packs in more
features and performance at the same price point of the mixer it succeeds. We now offer you 8 subgroups,
8 independent aux sends, 4 mute groups, 2 matrix outputs, stereo mic/line channels and lots more ...

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8 MONO INPUT CHANNEL EXPANDER
OPTIONS & ACCESSORIES
There are a range of options and accessories available for the GL3300 range. All are supplied complete
with fixings and installation and operating instructions. Contact your nearest Allen & Heath dealer if you
wish to purchase an option or accessory.
VU meterbridge
The VU meterbridge is designed for use in all lighting conditions and monitors Groups (Aux) 1-8, Left,
Right and Mono/PFL signal levels. It fits onto the rear extrusion beam of the console and is full length.
The meterbridges are available in 3 sizes. Please note, there is no meterbridge option avaiable for the 16
channel frame.
M
SM
GL3300-M24 VU METERBRIDGE Order Code: GL3300-M24
To fit GL3300 24 input channel console
GL3300-M32 VU METERBRIDGE Order Code: GL3300-M32
To fit GL3300 32 input channel console
GL3300-M40 VU METERBRIDGE Order Code: GL3300-M40
To fit GL3300 40 input channel console
Expander
The GL3300 can be expanded up to a maximum of 40 input channels. The expander is an 8 channel wide
bolt on module with full function input channels and soft armrest.It can be fitted to the left or right hand
side of the console depending on the console format. The expanders are available in 4 different formats.
Order Code: GL3300-8M
8 STEREO INPUT CHANNEL EXPANDER SOrder Code: GL3300-8S
4 MONO & 4 STEREO INPUT CHANNEL EXPANDER Order Code: GL3300-4MS
MS
4 STEREO & 4 MONO INPUT CHANNEL EXPANDER Order Code: GL3300-4SM
SYS-LINK Buss Expander Kit
The SYS-LINK expander option allows console to console interconnection by means of just two cables.
By connecting two GL3300 consoles together or to any other A&H console fitted with the SYS-LINK
option, the number of input channels can be increased. One console acts as a channel expander (slave)
to the second (master). Please note, the SYS-LINK option kit requires the installation and wiring of a
circuit board (PCB) assembly and should only be fitted by technically competent service personnel
SYS-LINK BUSS EXPANDER KIT Order Code: GL3300-SL1
(for one console only)
8 Group Output option Kit
The 8 Group Output option allows direct access to all 8 groups in the console. This is in addition to group
outputs 5-8 on XLR connectors on the rear panel. This option uses one of the SYS-LINK connector
mounting holes and may need to be repositioned if the SYS-LINK option is already fitted. Please note,
the 8 Group Output option kit requires the installation and wiring of a circuit board (PCB) assembly and
should only be fitted by technically competent service personnel
8 GROUP OUTPUT OPTION KIT Order Code: GL3300-8GD

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RPSD2 Dual Supply Combiner
TheRPSD2 isdesigned to monitor the DC power supplyto theGL3300 console. With an additional power
supply the RPSD2 will quickly and silently change over to the backup supply should the original power
supply fail.
RPSD2 DUAL SUPPLY COMBINER Order Code: RPSD-2/3K
RPS9 POWER SUPPLY Order Code: RPS9/Volts
(additional power supply for use with RPSD2)
GL3300 Flightcase
For regular touring and transportation the GL3300 can be fitted into a robust light weight aluminium
flightcase. Two types are available, one with the meterbridge permanently fitted to the console and one
with the meterbridge disconnected and stored inverted onto the rear extrusion beam. The second version
is also suitable if no meterbridge is supplied. Each version of flightcase includes space for the RPS9 power
supply and mains cable
GL3300-816 FLIGHTCASE (meterbridge not fitted) Order Code: AN2544
Dims: 980x740x280mm
GL3300-824 FLIGHTCASE (meterbridge not fitted) Order Code: AN2545
Dims: 1230x740x280mm
GL3300-824 FLIGHTCASE (meterbridge fitted) Order Code: AN2671
Dims: 1230x740x360mm
GL3300-832 FLIGHTCASE (meterbridge not fitted) Order Code: AN2546
Dims: 1490x740x280mm
GL3300-832 FLIGHTCASE (meterbridge fitted) Order Code: AN2670
Dims: 1490x740x360mm
GL3300-840 FLIGHTCASE (meterbridge not fitted) Order Code: AN2547
Dims: 1740x740x280mm
GL3300-840 FLIGHTCASE (meterbridge fitted) Order Code: AN2669
Dims: 1740x740x360mm
Miscellaneous
Please contact your nearest Allen & Heath dealer for the parts listed below.
GL3300 SERVICE MANUAL Order Code: AN3103
GL3300 SPARES KIT Order Code: 002-279
MAINS LEAD - EUROPE (2PIN) Order Code: AH0205
(RPS9 power supply)
MAINS LEAD - USA C33 (3PIN) Order Code: AH0323
(RPS9 power supply)
MAINS LEAD - UK (3PIN) Order Code: AH0206
(RPS9 power supply)

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INPUT CHANNELS
Plugina microphone or line level source. Use
balanced cables where possible to prevent
interference pickup on long cable runs.
Unbalanced sources may be connected by
linkingsignalcoldtoground(XLRpin3topin
1, jack ring to sleeve) at the connector.
ForlinesourcesonXLRsimply
plugintotheXLR withthejack
socket unplugged.
For balanced microphones which require
phantom power select +48V. If required this
switch may be disabled by an internal link.
Switch off channel +48V when the inputs are connected to non-
phantom powered, line or unbalanced sources.
F
Use the PFL system to listen
tothesignaland finetunethe
gainsetting.
MONO STEREO
φPHASE reverses the phase of the input
source to correct the phase differences often
encounteredin microphone placement,or due
toincorrectlywiredcables(pin3hotinsteadof
pin 2). May also be used to minimise acoustic
feedback between closely positioned
loudspeakers and mics in live sound mixing.
ThestereoφLreversestheleftinputphaseonly
tocorrectfordifferencesbetweenleftandright
signals, or for MS microphone techniques.
MIC/LINE selects line sensitivity on the jack
input when pressed. Or becomes a 20dB pad
for the XLR input when no jack is plugged in.
GAIN matches the level of the input source to
the normal operating level of the console.
Adjust this to read an average '0dB' on the
channel meter (yellow LED). Use the PFL
system to listen to the signal and fine tune the
gain.
100Hz lo-cut filter removes low frequency
noise such as microphone pops, stage noise
andtransportrumblebeforethepre-ampstage.
Thelo-cutfilterisindependentoftheequaliser.
The 4-band EQ lets you adjust the tonal
quality of the sound in 4 separate bands. HF
(treble) and LF (bass) are shelving while the 2
mid bands MF1& MF2 are peak/dip with a Q
of1.6. Thisisoptimumforbothcorrectiveand
creative equalisation. The controls are centre
detentedfor centre flat response. PressEQIN
to switch the EQ into the signal path.
The 2 mid frequency bands on the mono input
channel maybesweptacrossawidefrequency
rangetotuneintotheexactfrequencyrequired.
The mid bands are overlapping to provide
additional cut or boost when required.
The EQ on the stereo inputs has the 2 mid
frequencies at 250Hz and 2.5kHz. This
providesoptimumcontrol overboomyorboxy
sounds(MF2),andtoaddpresenceandsparkle
to vocals etc. (MF1). The stereo channels are
wellsuitedtostereomiking,dualmicmixing,
or returning keyboards and effects processors
to the mix and monitors.
Both Land Rup gives you a
truestereochannel. Pressboth
tomonothesource. Pressjust
one to select one side only as
a mono source.
Separate GAIN
controls for L and
R inputs let you
adjust the balance
between the
sources, or treat
each as a separate
source.
For line sources on
XLR simply plug
into the XLR with
the jack socket
unplugged.
Plugging a jack into the INSERT socket
breaks the signal path between the input
preamp/filter and the EQ to let you add an
externalsignalprocessorsuchasacompressor
or noise gate into the channel signal path
Use a suitable Y-lead or suitable TRS jack
lead to connect to the external processor.

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8 AUX SENDS provide ample feeds for foldback monitors and effects. These
areintwogroupsoffoureachwithaPOST/PREswitchtosourcethesendseither
pre-fader or post-fader.
AUX 1-4 feed balanced XLR outputs capable of driving long cable runs and
includeINSERTpoints. ThesearenormallyusedtoprovideMONITORSENDS
tothe performersand stagecrew, althoughthey canbe usedforadditionaleffects.
Plug a graphic EQ into the insert to 'ring out the monitor' (tune) to the stage
acoustics to minimise feedback. The effect of the EQ can be listened to using the
aux master AFL system. Monitor sends are usually set pre-fade, although some
sources such as radio mics can be set post-fade to avoid 'dressing room' talk spill.
Note stereo input channel aux sends are the mono sum of left and right.
AUX5-8feedjackoutputsandarenormallyusedtoprovideEFFECTSSENDS
to external devices such as reverb and delay effects units. Effects sends are set
post-fadesothattheamountofeffect(wetsignal)isalwaysrelativetotheposition
of the fader (dry signal). Adjust the amount of effect required for each channel
usingitsAUXcontrol. The effect isreturnedto the mix through anotherchannel,
usually the stereo return described later in this guide.
Note; when the GRP/AUX REVERSE 5-8 switches are pressed in the master
section AUX SENDS 5-8 feed XLR outputs with inserts. GROUPs 5-8 are re-
routed to AUX 5-8 jack outputs.
POST-FADE sends are always post-EQ, post-mute. PRE-FADE sends are set
post-EQ,post-muteasstandard,butmaybeinternallyresettobepre-EQ,pre-mute
or post-EQ,pre-mute. Each AUXSENDmaybe internallysetto bepermanently
pre or post-fade rather than follow the panel switch. Refer to the Internal Link
Options section in this user guide.
PAN positions the channel signal between the Left Land Right Routputs when
the L-R ROUTING switch is pressed. PAN also positions the channel signal
between the ODDgroups e.g. 1, 3, 5, 7 and EVENgroups e.g. 2, 4, 6, 8 when the
ROUTINGswitchesarepressed.Thisletsyoupositionthesoundswithinastereo
image. Inthiswaysubgroupsmaybesetupinmonoby turningthe PANfullyleft
LorrightRorinstereoby settingPANbetween Land Rtofeedapairofgroups.
MUTEswitchesthesignaloffwhen pressed. Amutedchannel isindicatedby the
illuminated switch. The channel meter continues to indicate pre-mute and fader
channel activity. The mute switch also illuminates when the channel is muted by
one of the 4 MUTE GROUPs.
Switches M1, M2, M3, M4 next to the fader, assign which mute group the input
channel will be assigned to. This is controlled by the MUTE GROUP switches
located in the master section.
A 100mm long throw FADER provides +10dB boost above the normal '0'
operating level.
A3LEDCHANNELMETERsystemshowssignalactivityatalltimes. Thegreen
SIG LED indicates signals greater than -20dBu, the yellow '0' LED represents
normal operating level, and the red PEAKLED warns of potential overload 5dB
before clipping. Set the channel so that the meter averages '0'. Back the gain off
if the red peak LED flashes.
Pressing PFL automatically interrupts the headphone monitor signal to let you
listen to the channel pre-fader signal without interrupting the main console
outputs. ThesignallevelisshownontheLRmonitorbargraphmeters,andonthe
Mono/PFLmeterif the optional meterpod isfitted. Inthisway each sound can be
correctly lined up and checked at any time.
DIRECTOUTtapsthesignaloffpostfaderforconnectiontoexternalprocessing
or recording equipment. This is ideal for multitrack recording during live
performance as each channel can be recorded onto a separate track for mixdown
later.Thedirectoutsignalcanbesetpre-faderiftheinternallinkoptionischanged.
Refer to the Internal Link Options section in this user guide.
8 AUX SENDS
Normal fader
position

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AUX SENDS
GROUPs 5-8 are available on
balanced XLR outputs to drive long
cable runs. INSERTS are provided
on all 8 groups to insert signal
processing devices such as
compressor/limiters into the signal
path. Usetheseoutputsasadditional
speaker feeds or for recording. In
'MONITORMODE', GROUPs5-
8becomeAUX5-8outputstoprovide
a total of 8 dedicated stage monitor
sends on XLR with inserts.
MUTEswitchesthesignaloff.Muted
groups are indicated by red LEDs.
AFLletsyou checktheoutputsignal
after the insert and fader control.
Eachgrouphas4wayLEDmetering
providingsignalpresenceindication
andpeakwarningwhichilluminates
approximately 5dB before clipping.
The subgrouping is always fed from
the group mix regardless of GRP/
AUX REVERSE.
All the XLR outputs operate at a
nominal high level +4dBu. Ensure
correct matching to external
equipment.
SUBGROUPING
Usingsubgroupsletsyougroupsimilar
sounds together under control of a
single fader (mono subgroup), or
panned pair of faders (stereo
subgroup). For example, the mics on
a drum kit (kick, snare, overheads,
toms), backing vocals, stage mics,
orchestral wind section etc.
Select L-R ON to route a group to L-
R as a subgroup. Position the signal
within the stereo image using PAN.
AUX5-8jackoutputsto
send selected signals to
external effects devices.
MODE
SWITCHES
AUX 1-4 balanced outputs
feedfoldbackmonitors with
graphic EQ on INSERT to
tuneoutacousticresonances
or to minimise feedback.
AFL lets you check the
outputsignal afterthe insert
and master level control.
MONITORS
GROUPS
EFFECTS
Decide your required
console configuration
and set these recessed
switches using a pen tip
orsimilar.
Press REVERSE to
swap the group fader
section with the aux
master section. This
represents 'MONITOR
MODE' where the aux
mix is on the fader with
METER, AFL,MUTE,
balancedXLRoutputand
INSERTforfullcontrolof
the monitor mix. AFL
lets you listen to and
check the effect of the
inserted graphic EQ or
similar processing
device.
In this mode the group
mix is available on the
aux master controls to
feedthejackoutputs,as
well as the subgroup
section.
Mixandmatchthisfader
section as you require.
For example you could
have2asmonitorsends,
4assubgroups,and2as
additionaloutputs.
These PAN settings show subgroup 1-2 as a stereo pair, and
subgroup 3-4 panned off centre to slightly close the stereo image,
useful when the speaker stacks are widely spaced and the front
rows of the audience may be confused by a full stereo image.
{

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STEREO RETURNS
2 Stereo return inputs are provided to return the
effects('wet')signal,usuallyfromastereodevice, to
the mix. These are normally routed to the main L-
Rmix but may be returned to the corresponding
pairs of subgroups for group effects (1-2 or 3-4).
These inputs may also be used as additional line
inputs, or as external inputs to the matrix mix by
selectingA-B. TheBALcontroladjuststhebalance
betweenleftandrightsignals,orcanbeusedasapan
controltoroutethesignaltoonesideonlybyrotating
fully. Asmooth travel 60mmfaderprovides precise
control of the level.
The L and Rinputs are on individual
jack sockets. Sensitivity is for line level
signals of -10dBV and more. For a
mono source plug into the Linput only.
TALKBACK
BalancedXLRinputforagooseneck(or
cable) microphone for the operator to
talktotheauxsends(foldbackmonitors).
+48V may be enabled by means of an
internal link for microphones which
require phantom power. Refer to the
Internal Link Options section in this
user guide
Talktotherequiredauxmixbypressing
andholdingtheappropriateswitch. Talk
to several at the same time by holding
down a combination of switches.
The ability to talk to individual auxes is
important when using the console for
stage monitoring and cueing the
performers.
Recording from the
GROUPS
There are two ways or recording from the
groups.Oneistoconnectthemultitrackinputs
to the group INSERT send and link the send
and return (jack tip to ring) together.
Alternatively,installthe8groupoutputoption.
Alloutputsareimpedancebalanced+4dBuor
-10dBV and available on a single 25 way D
typeconnectoronthe rear panel. (Refer to the
Options and Accessories section.)

16 GL3300 USER GUIDE
MATRIX
MUTE GROUPs let you mute a selected combination of channels with a single key
press. Applications include muting unused channels when mixing different bands,
muting all channels except 2-track playback during intermission, muting effects,
mutinga bankof radiomicsduringaninstrumental number,muting stagemics during
scene changes etc....
TheGL3300 includes4MUTEGROUPscontrolledby abankof 4large illuminated
buttons between the Group and L-R faders. These latching switches may be selected
one at a time or together.
To set up a mute group, press one of the mute group selector switches M1, M2, M3,
M4 on the input channels. Now press the corresponding mute group switch in the
mastersection.Themutegroupswitchandthechannelmuteswitchwillilluminateand
the input channel signal will be muted.
An input channel can be a member of more than one mute group by simply pressing
another channel mute group selector switch.
TwomatrixoutputsAandBareprovided. TheseareadditionaloutputsonTRSjacks
controlledby60mmsmoothtravelFADERSand withAFLmonitoringtocheckthe
post fader signal. The matrix mix is created from the 8 groups, L and R by adjusting
the MTXlevel controls. These signals are fed post their respective faders. Note that
in'MONITORMODE' (REVERSE selected) the matrix is still fed fromthegroups
(now routed via the aux masters). External inputs to the matrix are available from
theadjacentstereo returns.The matrixoutputscan bebalanced byfittingthe balance
option, refer to the Internal Link Options section in this user guide.
The matrix outputs satisfy a host of applications. Traditionally the matrix has been
usedtofeedadditionalspeaker systemssuch asauditoriumbalconyspeakers. These
arefed throughdelay unitsto compensatefor acousticdelay duetothedistancefrom
the main speakers. Here the balance of the mix may be slightly different from the
mainspeakers,forexamplevocallighttokeepthevocalsnearerthestage. Adjusting
the balance of the groups to the matrix achieves this. Another example is live sound
recording where the PA mix may be necessarily lacking in bass due to the acoustic
output of the orchestra or 'backline'. Compensate for this by recording from the
matrix with the group feeds adjusted for an even recording balance.
MUTE GROUPS
<
<
<
>
2
GROUP
MUTE

GL3300 USER GUIDE 17
LAMP
Plug in a 12V gooseneck lamp to provide illumination of the control
panel. This should be a BNC connector type.
Individualjacksocketsareprovidedforleftandrightinputs(returns)
from and outputs (sends) to a stereo recorder such as a DAT or
cassette machine.
Alternatively the RETURN may be used for stereo intermission
replay from a CD or similar to the main mix by pressing L-R. An
LED warns that replay is on.
The SEND may be used for recording the performance in stereo, or
to feed alternative speakers, drive an induction loop hearing aid
system, or to feed a stereo broadcast etc. The send is connected post
L-R faders as standard.
Separate send and return level controls adjust the signal to the
required line level and sensitivity. The console can work with both
high (+4dBu) and low (-10dBV) level equipment.
2-TRACK
Pluginstereoheadphones(30to600ohmsrecommended)underthe
armrest. Adjust the LEV control for comfortable listening level.
The phones and 12 segment bargraph meters normally monitor the
post-fadeL-Rmix. Press 2-TRKto monitorthereturn froma stereo
recorder if connected.
Pressing AFLanywhere on the console automatically overrides the
monitor withthe selected AFLsignal. Pressing PFLoverrides both
themonitorsourceandanyselectedAFL. Thisfeatureletsyoulisten
to an AFL source, group for example, and check channel signals
simply by pressing and releasing the required PFLbuttons. PFL or
AFL selected is indicated by means of a large red LED above the
meters.
MONITOR MODE
Press the mode switch for STAGE MONITOR application. The
mono out XLR now feeds the monitor engineers 'listen wedge'
speaker. It is advisable that the same type of loudspeaker is used for
this as those used for the stage monitors themselves.
Select your required application: LR sum mono out FOH, or AFL
interrupted by PFL, STAGE MONITOR.
PHONES MONITOR
L,R,M OUTPUTS
The main Land Routputs are individually controlled on two 100mm
long throw faders. The outputs are balanced XLR to drive long cable
runs. INSERT points are provided so that signal processors such as
compressors or limiters may be patched into the signal path.
Left and right signals are summed together to feed the balanced XLR
MONOoutputwhichmaybeusedtofeedacentrefillspeakersystem,
provideamono broadcast or recording feed, orworka mono PA with
capabilityforstereorecording.TheMONOoutputispostfadebutcan
be set pre-fade by changing internal link options.
LR SUM
AFL /PFL
FOH
ON STAGE
MONITOR
2
GROUP
MUTE

18 GL3300 USER GUIDE
Width Weight
GL3300-816..............................771mm ........................ 21kg
GL3300-824..............................1026mm ...................... 29kg
GL3300-832..............................1281mm ...................... 37kg
GL3300-840..............................1536mm ...................... 45kg
GL3300-expander.....................255mm ........................ 8kg
weight 5kg
GL3300 CONSOLE
PACKING DIMENSIONS
weight 2.5kg
RPS9 POWER SUPPLY RPSD2 DUAL SUPPLY COMBINER
master
section
DIMENSIONS
LENGTH DEPTH WIDTH WEIGHT in Kg (lbs)
GL3300- 816.............................1312 ............... 335............................... 795 ...............................38 (84)
GL3300- 824.............................1312 ............... 335............................... 795 ...............................45 (99)
GL3300- 832.............................1823 ............... 335............................... 795 ...............................55 (121)
GL3300- 840.............................1823 ............... 335............................... 795 ...............................59 (130)
GL3300 Expander ................... 78 ................. 310............................... 45 ...............................11 (24)
GL3300- M24 Meterbridge......1250 ............... 130............................... 230 ...............................4 (9)
GL3300- M32 Meterbridge......1270 ............... 130............................... 230 ...............................5 (11)
GL3300- M40 Meterbridge......1540 ............... 130............................... 230 ...............................6 (13)
RPSD2 ......................................560 ................. 70 ................................. 377 ...............................4 (9)
RPS9 SPARE ...........................532 ................. 270............................... 185 ...............................7 (15)
PACKED MEASUREMENTS in mm.
NOTE:Whenfittedinaflightcase,supportthe
rear of the console along the lower extrusion
beam and not the side trim plates.
Stereo inputs fitted to right of master section
Note: Stereo inputs are not available on 16 channel console.
È

GL3300 USER GUIDE 19
INTERNAL LINK OPTIONS
Theconsoleissettosatisfymostapplicationsthatshouldbeencountered. However,thefollowinginternal
linkoptionsareofferedtoprovidealternativesettingsforthoseapplications that may require them. These
options involve resoldering of circuit board links and should only be carried out by competent technical
personnel. Further information is available in the GL3300 SERVICE MANUAL and from your agent.
MONO INPUT
1. Reconfigure each aux as required to be
permanently pre-fade or post-fade rather than
switched by the front panel PRE/POST switch.
2. Reconfigurethe pre-fade sends to be post-
EQ / pre-mute, or pre-EQ / post-mute, instead
of the standard post-EQ / post-mute.
3. Disable +48V phantom power regardless
of panel switch position - remove link.
4. Reconfigure Direct Out to be pre-fader
instead of post fader.
STEREO INPUT
1. Reconfigure each aux as required to be
permanently pre-fade or post-fade rather than
switched by the front panel PRE/POST switch.
2. Reconfigurethe pre-fade sends to be post-
EQ / pre-mute, or pre-EQ / post-mute, instead
of the standard post-EQ / post-mute.
3. Disable +48V phantom power regardless
of panel switch position - remove link.
LEFT
1. Reconfigure the LR sum source (mono)
from post LR faders to pre faders.
2. Enable +48V phantom power to talkback
mic input - fit link.
GROUP
1. Fit Matrix out balance option for jack
output tip = hot, ring = cold. Remove two links
and plug in balance driver IC.
2. Reconfigure the feed to the optional VU
meterpodtofollowtheauxmasterrotarycontrol
ratherthanthegroupfader - remove tworesistors
and link two pairs of pads with a length of wire.