ALLEN & HEATH GL 2000 User manual

GIpooo
AUDIO MIXING CONSOLE
ALLEN
ifeif
HEATH
USER
GUIDE
PUBLICATION AP2548

LIMITED ONE YEAR WARRANTY
This product has been manufactured in the UKby ALLEN &HEATH and is warranted
to be free from defects in materials or workmanship for aperiod 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 afailure 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:
1The equipment has been installed and operated in accordance with tire instnictions 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.
ALLEN &HEATH AGENT:
U.K. FACTORY:
ALLEN &HEATH.
Kernick Industrial Estate,
Penryn.
Cornwall. TR10 9LU.
HADIVISION OF HARMAN INTERNATIONAL INDUSTRIES Ltd.
copyright© 1997 ALLEN &HEATH. All rights reserved Publication AP2548 Issue 2

INTRODUCTION
The GL2000 continues ALLEN &HEATH’s commitment to provide high quality audio mixing consoles
engineered to meet the exacting requirements oftoday’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 aquick reference to the function, application and installation of the GL2000. 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 GL2000 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 ofapproved dealers and service agents.
To help us provide the most efficient service please keep arecord ofthe 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 GL2000. Do not carry out any work within the console while it is powered.
The console mains voltage setting is indicated on the rear of the console.
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 OV connects to the console chassis internally. Should problems be
encountered with ground loops, operate the audio ground lift switches on
connected equipment or disconnect the cable screens at one end. Refer to
the section on 'EARTHING' in this User Guide.
PRECAUTIONS.
AC POWER: Check the power unit for correct AC mains voltage setting before switching on. Allow
adequate space around the unit for ventilation.
CONNECTIONS: Use audio connectors and cables only for their intended purpose. Do not connect any
source ofAC or DC power to the console audio connectors. Do not connect the output
of power amplifiers directly to the console.
CLEANING: Avoid the use of chemicals, abrasives and solvents. The control panel is best cleaned
with asoft brush and lint-free cloth. To remove stubborn marks (such as chinagraph
pencil) isopropyl alcohol may be used.
LUBRICATION: The faders, switches and potentiometers are lubricated for life. The use of electrical
lubricants on these parts is not recommended.
DIRT, DUST, SMOKE and MOISTURE: Prevent damage to the moving parts, such as faders and
potentiometers, and cosmetics by avoiding drinks spillage, tobacco ash and smoke,
and exposure to rain and condensation. Protect from excessive dirt, dust, heat and
vibration.
GL2000 User Guide 3

CONNECTING AC MAINS TO THE CONSOLE
Refer to the SAFETY WARNING on the first page of this User Guide.
Mains input to the GL2000 is via astandard 3pin IEC mains input connector. Amains cable with moulded mains
plug suitable for the local supply is supplied.
Checkthatthe voltage indicated in the fuseholderwindow is the same
as the mains supply in your area.
O
WARNING
ATHIS APPARATUS
HIGH VOLTAGE INSIDE —
DISCONNECT AC MAINS INPUT BEFORE REMOVING BASE
REPLACE FUSE WITH CORRECT TYPE AND RATING DNLY
SET VOLTAGE TO MAINS SUPPLY
AC INPUT FUSE 20nn
loo-iaov'u, ?eo-24ov'u
71.GA T630nA
MUST BE EARTHED.
A
C€
50/60Hz a,
75V MAY
AC mains supply =100 to 110 V.AC
AC mains supply =110 to 125 V.AC
AC mains supply =2 10 to 230 V.AC
AC mains supply =235 to 260 V.AC
(100) T1.6A 20mm fuse
©
CM
V" T1.6A 20mm fuse
f230) T630mA 20mm fuse
(240} T630mA 20mm fuse
Toavoid 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.
Always switch the unit off before connecting or disconnecting the
console power cable.
This unit contains no user serviceable parts. Do not remove the
cover. Refer servicing to qualified service personnel only.
EARTHING THE AUDIO SYSTEM
The console chassis is connected to mains earth via thepower cable. Audio 0Vis 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 operator safety do not remove the earth connection from
the AC mains plug.
For best performance it is important that the earth system is solid, clean and noise-free. To prevent mains bom
and external interference pickup from lighting equipment, motors and other mains powered equipment it is
recommended that aseparate '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.
GL2000 User Guide

PLUGGING UP THE CABLES
Wherepossible use balanced connections to prevent noise and interference pickup especially on long microphone
cableruns. Avoidrunning audio cables next to AC mains, computer or lighting cables, nearthyristor 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 (in-phase) with professional quality cable and carefully soldered connections. The following
wiring convention is used:
XLR ^pin 1-OV earth shield ^1/4" jack 'tip =+/hot /signal /left /send >
pin 2 =+/hot (in phase signal) ring =-/cold /0V /right /return
pin 3--/cold (out of phase signal) sleeve =0V earth shield
VJ
To connect an unbalanced source to abalanced console input, link the cold input (XLR pin 3orjack ring) to 0V
earth (pin 1orjack sleeve) at the console. To connect abalanced console output to an unbalanced destination link
the cold output to 0Vearth at the console.
anrz (OUTPUT
BALANCED Sleeve
RingTip Ring TWIN SCREENED CABLE 3‘HN XLR FESMLIEPLUG CONSOLE
CONNECTIONS
auEi >=u INPUT
w3-POLE (STEREO) JACK PLUG 3-PIN XLR MALE PLUG
Screen not connected at destination
UNBALANCED
(If 3^=^ <1
V) Sleeve
-5 «SINGLE SCREENED CABLE
(II -=> f
OUTPUT
3-PIN XLR FEMALE PLUG
INPUT
V." 2-POLE (MONO) JACK PLUG 3-PIN XLR MALE PLUG
CONSOLE
CONNECTIONS
UNBALANCED
Steeve Rjng
HZP<(—mo output
link Tip >a>
SINGLE SCREENED CABLE «E-
-tr *-
in
=n)>QClglOzzinD input
RCA PHONO PLUG '/<" 3-POLE (STEREO) JACK PLUG
CONSOLE
CONNECTIONS
Deselect input channel +48V when inputs are connected to
non-phantom powered, mic, line or unbalanced sources.
ADJUSTING THE LEVELS
For best performance it is important that the connected source signals are matched to the "normal operating level"
ofthe console. Similarly the console outputs should be correctly matched to the operating levels ofthe connected
amplifiers and destination equipment. If too high the signal peaks will be clipped resulting in aharsh 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 'O' orjust below and allowing the loudest passages
and occassional peaks into the 'yellow'. Reduce the gain if the peak indicators flash (red). The GL2000 produces
astandard XLR output level of +4dBu for ameter reading of OVU. 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 result in fader levels around the 'O' mark.
The GL2000 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.
Usethe channel PFL switches to set up the input GAIN controls to read an average 'O' (yellow LED).Signal activity
is always shown on the channel meters regardless offaderposition. The green 'SIG' LEDlights at -20dBu to indicate
signal presence, the green 'O' LED indicates normal level, and the red 'PEAK' LED warns ofpotential overload 5dB
before clipping.
GL2000 User Guide 5

GL2000
The ALLEN &HEATH GL2000represents abreakthrough in price versus performance and functionality. Itoffers
the professional user anew level ofversatility to quickly adapt to the exacting demands of live sound engineering
today. The GL2000is developed fronithe very successful GL3 consolewhich first introduced the innovative 'mode
switching' that quickly converts the console from Front-of-House to On-stage Monitor operation. Apart from
continuing the development ofthis unique feature the GL2000packs in more features and performance at the same
price point of the mixer it supercedes. We now offer you 4subgroups, 6independent aux sends, stereo mic/line
channels and lots more ...
YEasy to use intuitive layout.
Y12, 16, 24 and 32 channel models with 20, 24 32 and 40 inputs to the mix respectively.
YInternal power supply unit.
YSYS-LINK buss expander option.
Y2stereo mic/line channels as standard.
YLRoutputs on balanced XLR with inserts.
yMono sum output on jack output.
Y4groups with outputs available on balanced XLR with inserts.
YSubgrouping to LRwith pan control and switch for each group.
Y6independent aux sends on jack outputs.
Y2stereo returns on faders with Eq and routing.
YMode switching to convert console to on-stage monitorwith 6sends on balanced XLR with inserts.
YMode switching converts mono output to monitor engineers 'listen' wedge.
Y2-track record and replay with level controls.
YTalkback to all aux sends selected in pairs.
YAdvanced channel features including +48V, phase switch, lo-cut filter, meter and insert.
Y4band 2sweep EQ with wide ranging frequency sweep and +/-15dB boost/cut.
YPre-post aux switching with additional internal link options.
YHigh performance circuitry used for low noise and sonic purity.
YHigh quality, proven reliable parts used throughout.
YRear mounted connectors, comfortable soft armrest, wide write-on strips.
YRugged metal construction for on-the-road rigidity, easily flightcased and transported.
YRemoveable steel base for easy access to individual circuit assemblies.
6GL2000 User Guide

FRONT PANEL LAYOUT
MULTI-FUNCTION AUDIO MIXING CONSOLE
MIC .30.
GAIN
OMIC TO TALKBACK LF
LINE 4s
LEV 3U
Oo
-15 /~\-.15
0
-15 /'+15
IAL \?/
&
1n
OM PEL
HE \>/
wun*
-15 T^'+IS
-15 +15
C
‘AL \-L/
LP
CU PFL
4r6
©
d\> RETL
fiEPLAY
I,
T°
)
SEND o' No oio RETURN
OCCO0D j
27/20 [BBi mLINE -
o
-15 ''+15
-A
-, 5
'Vt:,5
TIT
-15 /'+15
©
-15 ''+15
|^H EQ IN
456
o;
#
0,10
4?6
©
fs6
©:
010
mPOST
-PRE
#
o10
MPOST
«PRE
-
OOD /EVEN
LMONITOR R
-3 ea -3
rn omO
ALIBI
m
HE/JH
G12000
PHONES MONITOR
LEV _5.
4?6«s™A 456flUA 4b6AUX 456AUX 456
l3>S^743>^V75*>k^ 6a>iV7
y> w
Oln oH^fl (;- oB«fl oB«fl OH*FL
<35 Htalk c£,« Ta;-K
9:R;Rr Rr Rr R
00 0 00
pBL-fl pBi-RpBL_
"pB1-" ri Hm
PAN \_L/ PAN \_L /PAN \1/PAN N 1 /LEV \!/ ,
&&&
LPLnLpL
o| o| o|
AFL -AFL -j AFL AFL
IO +IO +IO |
°B o|
AFL |AFL
-IO j-1C -IO
M0
MFl 0
MF2 0
GL2000 User Guide

THE RANGE
12, 16 24 and 32 channel models.
GL2000-41
2
10 mono, 2stereo, 4groups, 6aux, 2stereo returns, L,R, Mono sum
GL2O00-41
6
14 mono, 2stereo. 4groups, 6aux, 2stereo returns, L,R, Mono sum
GL2000-424 22 mono, 2stereo, 4groups, 6aux, 2stereo returns, L,R, Mono sum
GL2000-432 30 mono, 2stereo, 4groups, 6aux, 2stereo returns, L,R, Mono sum
Optional SYS-LINK buss expander system
GL2000-SL1 One kit required per console. User to source interconnecting cables.
DIMENSIONS
GL2000-412 width 548mm
GL2000-416 width 668mm
GL2000-424 width 920mm
GL2000-432 width 1160mm
SPECIFICATION
0dBu =0.775 Volts RMS 0dBV =1Volt RMS
INTERNAL OPERATING LEVEL.-2 dBu
INTERNAL HEADROOM: +21 dB channels, +23dB mix to output.
MAX OUTPUTS: balanced +27dBu 600 ohm max load
unbalanced +21 dBu 2kohm max load
METERS: L, Rpeak reading 12 segment LED
Groups 1-4 peak reading 4segment LED
Channels peak reading 4segment LED
PEAK LEDs: .Turn on 5dB before clipping
POWER SUPPLY: internal
AC Mains input: range 100V to 240V AC @50/60Hz
Set with 4position selector
Power consumption 60W max
Mains Fuse rating: 100-1 20V AC use T1.6A 20mm
220-240V AC use T0.63A 20mm
FREQUENCY RESPONSE: 20Hz to 50kHz +0/-1 dB
DISTORTION: THD +Noise at +14dBu 1kHz
Mic in to LR out at +40dB gain 0.010%
Line in to LR out at OdB gain 0.008%
CROSSTALK:. Referred to driven channel at 1kHz
Adjacent channel <-94dB
Fader shutoff <-90dB
Mute shutoff s-90dB
Panpot shutoff <-80dB
NOISE: Measured RMS 22Hz to 22kHz bandwidth
Mic input EIN referred to 150 ohm source <-128dB
Line input pre-amp at OdB gain <-90dBu
LR output residual noise <-94dBu 98dB S/N
LR faders 'O' no channels routed <-90dBu 94dB S/N
LR mix noise with 16 channels routed <-84dBu 88dB S/N
Group faders 'O' no channels routed <-91 dBu 95dB S/N
Group mix noise with 16 channels routed <-84dBu 88dB S/N
8GL2000 User Guide

REAR PANEL CONNECTIONS
r
r
30- s™EO -29 i
L
MONO
INSERT INSERT
OPTION
SYS-UNK
SYS-LINK TALKBACK 1
©
OUTPUT
XLR mo
UP Q.
z; ^
CxL
1/4" JACK
CONNECTIONS
INPUTS:
MIC IN .XLR pin 2hot, 3cold, balanced .2kohms ... variable -60 to -10 dBu
LINE IN ..XLR pin 2hot, 3cold, balanced .>10 kohms... ...variable -40 to +10 dBu
or 1/4" JACK. tip hot, ring cold, balanced .>10 kohms... ..variable -40 to +10 dBu
STER CHAN LINE IN.. .1/4" JACK ..>8 kohms ....-20 dBu min
STEREO RETURN 1/4" JACK .tip sig, ring gnd, unbalanced. ..>6 kohms ..-10 dBV min
2-TRACK RETURN .RCA PHONO unbalanced. .>10 kohms
INSERT RETURN .1/4" JACK tiD send rina ret unbalanced >fi knhm<a
OUTPUTS:
L, R, GROUP OUT XLR
MONO OUT (AFL/PFL). 1/4" JACK
(balance option).... 1/4” JACK
AUX OUT 1/4" JACK
(balance option).... 1/4" JACK
2-TRACK SEND RCA PHONO
INSERT SEND 1/4" JACK
MONITOR OUT 1/4" JACK
PHONES OUT 1/4" JACK
pin 2hot, 3cold, balanced <75 ohms:. +4 dBu +27 dBu max
.tip hot, ground comp. <75 ohms... ...... -2 dBu +21 dBu max
.tip hot, ring cold, balanced <75 ohms +4 dBu +27 dBu max
.tip hot, ring cold, ground comp. <75 ohms ...-2 dBu +21 dBu max
.tip hot, ring cold, balanced <75 ohms.,.. +4 dBu +27 dBu max
unbalanced <75 ohms... variable +21 dBu max
.tip send, ring ret, unbalanced... <75 ohms 0dBu (chan), -2 dBu (out)
.tip left, ring right, unbalanced... <75 ohms .variable +21 dBu max
.tip left, ring rightfor stereo headphones 32 to 600 ohms
MECHANICAL
UNPACKED (PACKED) MEASUREMENTS in mm.
WIDTH DEPTH HEIGHT WEIGHT in Kg/lbs
GL2000- 412 548 (700) .572 (750) 155 (280).... ....16/35.2 (20/44.4)
GL2000- 416 668 (815) .572 (750) 155 (280)..,. .... 18/39.6(23/50.6)
GL2000- 424 920 (1065) 572 (750) 155 (280).... ...24/52.8 (29/63.8)
GL2000- 432 1160 (1325) 572 (750) 155 (280)........ 30/668 (35/77)
GL2000 User Guide 9

INPUT CHANNELS
For line sources on XLRsimply
plug into the XLRwith thejack
socket unplugged.
MONO
Plug in amicrophone or line level source. Use
balanced cables where possible to prevent
interference pickup on long cable runs.
Unbalanced sources may be connected by
linking signal cold to ground (XLRpin 3to pin
1, jack ring to sleeve) at the connector.
Switch off channel +48V when the inputs are connected to
non-phantom powered, line or unbalanced sources.
For mono line
sources plug into
the L/MONOjack
socket only..
STEREO
For balanced microphones which require
phantom power select +48V. If required this
switch may be disabled by an internal link.
Use the PFL system to listen
to the signal and fine tune the
gain setting.
-ADJUST
INSERT lets you plug in
external effects and signal
processing equipment into the
signal path. Operate at around
OdBu line level.
SEND
CZH
RETURN
INSERT
TIP
PRE-EQ
PHASE reverses the phase of the input
source to correct the phase differences often
encountered in microphone placement, or due
to incorrectly wired cables (pin 3hot instead
of pin 2). May also be used to minimise
acoustic feedback between closely positioned
loudspeakers and mics in live sound mixing.
MIC/LINE selects line sensitivity on the jack
input when pressed. Or becomes a20dB pad
for the XLR input when no jack is plugged in.
GAIN matches the level ofthe input source to
the normal operating level of the console.
Adjust this to read an average 'OdB' 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
andtransport rumble before the pre-amp stage.
The lo-cut filter is independent ofthe equaliser.
The 4-band EQ lets you adjust the tonal
quality of the sound in 4separate bands. HF
(treble) and LF (bass) are shelving while the 2
mid bands are peak/dip with aQof 1.6. This
is optimum for both corrective and creative
equalisation. The controls are centre detented
for centre flat response. Press EQ IN to switch
the EQ into the signal path.
Separate GAIN
controls for the
MIC and LINE
inputs let you
adjust each source
separately.
Pressing LINETO
L-R routes the
stereo line source
direct to the L-R
mix. In this way
both the mic and
stereo line inputs
may be used at the
same time
MIC/LINE selects either the
mic XLR input or the stereo
linejack inputs to the channel.
When selecting LINE on the
second stereo input channel,
the MIC input section is
available as the source for
talkback. The input channel
can be used in the normal way
with the line inputs.
12kHz
The 2mid frequency bands may be swept across a
wide frequency range to tune into the exact
frequency required, most useful for getting the
best out of microphones or when tuning out
troublesome feedback. The mid bands are
overlapping to provide additional cut or boost
when required, or provide atailored response to
suit any application.
The 4-band stereo EQ puts the 2mid frequencies
at 250Hz and 2.5kHz. This provides optimum
control over boomy or boxy sounds (250Hz), and
to add bite or reduce harshness to keyboards,
vocals etc. (2.5kHz). The stereo channels are well
suited to stereo miking, dual mic mixing, or
returning keyboards and effects processors to the
mix and monitors.
10 GL2000 User Guide

6AUX SENDS
6AUX SENDS provide
ample feeds for foldback
monitors and effects. These
are in two groups each with a
POST/PRE switch to source
the sends either pre-fader or
post-fader.
off! “te
AUK OUT
5-6
Note; AUX 1-6
feed XLR outputs
with inserts when
the GRP/AUX
REVERSE
switches are
pressed in the
master section.
MIC/
LINE
LINE IN -20dBu
BAL
MIC/LINE IN
AUX 1-4 and AUX 5-6 can be used as
either MONITOR SENDS to the
performers or stage crew or as EFFECTS
SENDS to external signal processing
equipment. The output can be listened to
using the aux master AFL system. Monitor
sends are usually set pre-fade (PRE),
although some sources such as radio mics
are often set post-fade (POST) to avoid
'dressing room' talk spill. Note, the stereo
channel aux sends are amono sum of left
and right.
INTERNAL AUX
LINK OPTIONS
PRE-FADE
POST -FADE
PRE-FADE
SWITCHED
POST-FADE AUX 2
AUX 3
o
0-
0
Q-
-o --
—o—5AUX 5o-
o
EFFECTS SENDS to external devices
such as reverb and delay effects units,.are
usually set post-fade so that the amount of
effect (wet signal) is always relative to the
position of the fader (dry signal). Adjust
the amount of effect required for each
channel using its AUX control. The effect
is returned to the mix through another
channel, usually the stereo return described
later in this guide.
POST-FADE sends are always
post-EO. post-mute.PRE-FADE
sends are set post-EO. post-mute as
standard, butmaybe internally reset
to be pre-EQ. pre-mute or post-EQ.
pre-mute. Each aux may be
internally set to pre or post-fade
permanently rather than follow the
panel switch.
-lO
-20
MUTE switches the signal offwhen pressed regardless of fader position. Muted
channels are indicated by red LEDs. The meter continues to indicate pre-fader
channel activity.
PAN positions the channel signal between L(odd) and R(even) ofthe outputs
selected on the L-R and groups 1-2, 3-4 ROUTING switches. This lets you
position the sounds within astereo image. In this way subgroups may be set up
in mono or stereo to feed the main L-R mix.
A100mm long throw FADER provides +10dB boost above the normal 'O'
operating level.
A4LED CHANNEL METER system shows signal activity at all times. The
green SIG LED indicates signals greater than -20dBu, yellow 'O' and '+6'
represents normal operating level, and red PEAK warns of potential overload
5dB before clipping. Set the channel signal so that the meter averages between
'O' and '+6'. Back the gain off if the red peak LED flashes.
<Normal
fader position
Pressing PFL automatically interrupts the headphone monitor signal to let you listen to
the channel pre-fader signal without interrupting the main console outputs. The signal
level is shown on the L-R monitor bargraph meters. In this way each sound can be
correctly lined up and checked at any time.
GL2000 User Guide 11

AUX SENDS EFFECTS
MONITORS
In this example AUX OUT
1-4 feed stage foldback
monitors. AFL lets you
check the output signal after
the master level control.
STEREO COMPRESSOR/LIMITER
Here astereo compressor is shown
INSERTED into the L-R signal path
pre-master L-R faders.
!NS£PT \INSEHT
L?
AUX 5-6 outputs send selected signals r,®
to external effects devices. Anominal ^(h
control setting of 7' allows +1 OdB boost '
above normal line level.
STEREO EFFECTS DEVICE
WEDGE MONITOR SPEAKER GROUPS L,R
MODE
SWITCHES
Decide your required
console cemfiguration.For
front of house FOH, the
switched should be up. For
ON STAGE MONITOR
mode, pre$s the recessed
switched using apen tip or
pointed! object.
By pressing GRP AUX
REV the; group fader
section will swap with the
aux mister section in
pairs. This represents 'ON
STAGE |MONITOR
MODE! Where the aux
mix is controlled with the
fader and: monitored on
the METER and AFL.
The aux: rftix is output on
the bal$ncjed XLR with
INSERT. AFL lets- you •
listen to "and-oheek- the
.
effect of the inserted
graphic EQ or similar
processing device.
In this mode the group
mix is available on the
aux master controls with
output feed on the jack
sockets.
Mix and match this fader
section as you require. For
example you could have 2
as monitor sends and 2as
subgroups.
AUX *56AUX 5BAUX A56AUX as5AUX ^56AUX a5
AUX MASTERS Xu XJ XJ (J Xu
010 0to 010 010 0to 010
cI'l o|« oB oBjf -oBafl o|h
Loh.cSSm CZm Tt"
rj-fAK ripfjK
IIII
34
AUX3 AUX4
r*L'" rBL'RrBL‘B
IcIcIcIc.,6
PAN \i/ PAN \_L/ PAN \i/ PAN viz |LEV M/,
LRLRLR LR 010
o| o| oB o|
AFL 1AFL -} AFL -3 AFL oB o
L*fL _R
TO +IO +10 +IO
GROUPS 1+4 and L,Rare available
on balanced !XLR outputs! to drive
long cable |runs. INSERTS are
provided to insert signal processing
devices suchjas compressor/limiters
into the signial path. These outputs
can be as additional speaker feeds or
for recording. In 'ON iSTAGE
MONITOR iMODE' these: become
AUX 1-4 outputs with AUX 5,6 on
the L,R outputs.
All the XLR outputs operate at a
nominal high level +4dBui Ensure
correct matching to external
equipment. j!
SUBGROUPING
Using subgroups lets yougrpup similar
sounds together under the control ofa
single fader,1(mono subgroup), or a
panned pair of fadefs (stereo
subgroup). For example, the mics on
adrum kit (kick, snare, overheads,
toms), backing vocals, stage mics,
orchestral wind section etc.
Select L-R to route agroup to L-R as
asubgroup. Position the signal within
the stereo image using PAN. This
illustration shows subgroup 1-2 as a
stereo pair, and subgroup 3-4 panned
just off centre to close the stereo
image, useful when the speaker stacks
are widely spaced and the front rows
ofthe audience may be confused by a
full stereo image. Note that the
subgrouping to L-R always follows
the signal on the master fader. This
becomesthe aux mix in monitor mode
.
(GRP/AUX REV selected)
12 GL2000 User Guide

STEREO RETURNS
The L/Mono and Rinputs are
on individual jack sockets.
Sensitivity is set for line level
signals of -lOdBV and more.
For amono source plug into
the Linput only.
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CFFL
A2band EQ
provides HF and
LF control with
15dB cut and
boost at 12kHz
and 80Hz
respectively.
This is often
used to remove
unwanted high
or low frequency
noise from
effects devices.
29-30 31-32
2Stereo return inputs are provided to return
the effects ('wet') signal, usually from astereo
device, to the mix. These are normally routed
to the main L-R mix but may be returned to
the corresponding pairs ofsubgroups for group
effects (1-2 or 3-4). Use PFL to check the
quality and level of the signal (in mono).
These inputs may also be used as additional
line inputs to the mix by selecting L-R. The
BAL control adjusts the balance between left
and right signals, or can be used as apan
control to route the signal to one side only by
rotating fully. Asmooth travel 60mm fader
provides precise control of the level.
L,R,M OUTPUTS
The main Land Routputs are individually
controlled on two 100mm long throw faders.
Left and right signals are summed together
through a separate level control to the MONO
jack output which may be used to feed a
centre fill speaker system, provide amono
broadcast or recording feed, or work amono
PA with capability for stereo recording.
GL2000 User Guide
B*L DUT OPTION
r-
1
m. GROUP/LEFT ||PEAK
1’6dB
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INSERT a
-1
FADER 1
1
SUBGROUPING
fSfflUP CC1S ONLY! [
PAN L-R
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AUX1AUX3AUX5
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^JOUT ^grp /pgrp ;*;grp
AUx\ /»ux\ /A(jx\ /
GRQUPl GRDUP3LEFT
|REV aREV
SAME FDR
GROUPI-2. GR0UP3-4, L-R
AUX1-2. AUX3-4. AUX5-6
BAL OUT OPTION
m^”1 AUX2AUX4AUXb
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out ;grp \GBP /GRP
AUX, ,AUX, ,AUX\ /
LMOMTOR R
B
1-26
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SUBGROUPING
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PAN L-R 1
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the 4segment channel and group meters.
sThe LRmonitor meter graphic displays the range of
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PHONES MONITOR
Q) PFl/AFL
PtlONfS MONITOR
Use stereo headphones with nominal impedance of
150 to 600 ohms. Adjust the LEV control for
comfortable listening level. The phones and 12
segment bargraph meters normally monitor the post-
fade L-R mix. Press 2-TRK to monitor the return
from astereo recorder or replay device if connected.
Pressing PFL or AFL anywhere on the console
automatically overrides the monitor with the selected
PFL or AFL signal. Check channel or output signals
by pressing and releasing the required PFL or AFL
buttons. APFL or AFL selected is indicated by
means of alarge red LED below the meters.
CS3
•;|m
Normal
fader
position
MONO
LISTEN WEDGE MONITOR
Select your required
application: LRsum
mono out for FOH, or
PFL/AFL for STAGE
MONITOR.
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.
13

TALKBACK
“c16
SECOND STEREO INPUT CHANNEL ONLY
The Talkback input
is connected into the
balanced XLR Mic
input of the last
stereo channel. By
selecting LINE, the
Talkback to AUX
mix is enabled for
the operator to talk
to the aux sends in
pairs. +48V is
available for
microphones which
require phantom
power.
TALKBACK
MIC TO TALK
_ENABLE
GAIN (LAST STEREO ONLY))
MIC IN O
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o-
The line jack inputs
ofthe stereo channel
can still be used as
inputs to the channel
when the mic input
is enabled for
talkback.
SECOND STEREO INPUT CHANNEL ONLY
Talk to the required aux mix in pairs, by pressing and holding the
momentary talk switch. Talk to several at the same time by
holding down acombination of switches.
The ability to talk to auxes (foldback monitors) is important when
using the console for stage monitoring and cueing the performers.
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Individual RCA phono sockets are provided for the left and
right outputs (sends) and inputs (returns) to and from astereo
recorder such as aDAT or cassette machine.
Alternatively the RETURN inputs may be used for stereo
intermission replay from aCD or similar to the main mix by
pressing REPLAY TO L-R. An LED warns that replay is
selected.
The SEND may be used for recording or broadcasting the
performance in stereo, or to feed an alternative set ofspeakers,
or drive an induction loop hearing aid system. The send
outputs are 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 (-lOdBV) level equipment.
2-TRACK
The green ON LED indicates
the console is powered up.
14 GL2000 User Guide

INTERNAL LINK OPTIONS
The console is set to satisfy most applications that should be encountered. However, the following internal link
options are offered to provide alternative settings for those applications that may require them. These options
involveresoldering of circuit board links and should only be carried out by competent technical personnel. Further
information is available in the GL2000 SERVICE MANUAL and from your agent.
MONO &STEREO INPUT
1Reconfigure each aux as required to be permanently pre-fade or post-fade rather than switched
by the front panel PRE/POST switch.
2. Reconfigure the pre-fade sends to be pre-EQ /pre-mute, or post-EQ /pre-mute, instead of the
standard post-EQ /post-mute.
3. Disable +48V phantom power regardless of panel switch position -remove link.
AUX 2/4
CUT LINKS
INSERT 1C
SSM2142
AUX 1/3
CUT LINKS
INSERT 1C
SSM2142
1.ForMonoout &Aux out balance option with
jack outputtip =hot, ring =cold. Removetwo
links and plug in balance driver IC.
GROUP
1.For Aux out balance option withjack output
tip =hot, ring =cold. Remove two links and
plug in balance driver IC.
GL2000 User Guide 15

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