ALLEN & HEATH GL4000 Manual de usuario

ALLEN&HEATH

GL4000

Dual Function Audio Mixing Console

USER GUIDE

PUBLICATION: AP2642

USER GUIDE

CONTENTS

Warranty ............................................................... 2

Introduction ........................................................... 3

Overview .............................................................. 4

Range and Options ............................................... 5

Dimensions and Weights ...................................... 6

Specifications ....................................................... 7

System Block Diagram ......................................... 8

Connectors ......................................................... 10

Earthing .............................................................. 13

Connecting the Power Unit ................................. 14

Matching the Signal Levels ................................. 15

Mono Input Channel ........................................... 16

Stereo Input Channel .......................................... 18

Stereo Channel Applications............................... 19

Group Section .................................................... 20

LR Section .......................................................... 21

Mono and Master Section ................................... 23

The Mute System ............................................... 26

Mute Groups ....................................................... 28

Mute Safes ......................................................... 31

Mute Patches ..................................................... 32

The Patch Display .............................................. 33

QuickSolo ........................................................... 36

Solo Safes .......................................................... 37

MIDI .................................................................... 38

Technical Support............................................... 42

Front-of House Application ................................. 44

On-Stage Monitor Application ............................. 48

Multi-Speaker System Application ...................... 51

Internal Link Options ........................................... 52

Panel Layout Drawing ............................. rear cover

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 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.

MANUFACTURED IN THE UNITED KINGDOM

Allen & Heath Limited.

Kernick Industrial Estate,

Penryn, Cornwall, TR10 9LU.

http://www.allen-heath.com

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.

INTRODUCTION

The GL4000 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 and application of the GL4000. 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 GL4000 does not require user maintenance or internal calibration. In

certain cases it may be necessary to reconfigure internal option links. This and any service work

required should be carried out by qualified service or engineering 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.

GENERAL PRECAUTIONS



POWER SUPPLY Use only the power unit specified for the console. Check the 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 of AC 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 a soft brush and dry 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, smoke, and exposure

to rain and condensation. Protect from excessive dirt, dust, heat and vibration.

Mains electricity is dangerous and can kill. Mains voltage is present within the power

supply unit provided with the console. Do not remove the power unit cover with 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 0V

connects to the console chassis internally. Should problems be encountered with 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



Dual function + live recording capability :

Large venue Front-of-House

Dedicated 12 buss (10mix+LR) stage monitor

Dual function combines Front-of-House and monitor

Live recording to 2-track and multitrack

24, 32, 40, 48 frame sizes including VU Meterpod

Stereo models include mic/stereo line channels depending

on customer specification

8 groups with inserts and trimmable balanced XLR outputs

L,R,M mix on balanced XLR and with inserts

10 Aux sends on balanced XLR and with inserts

4 Matrix capable of balanced XLR and inserts

Matrix to aux link feature for group effects and monitors

Secondary LR output capable of balanced XLR and inserts

Channel Direct outputs with level trim and pre/post

4 band full sweep channel EQ with mid Q switches

Stereo channel 4-point width control

Separate insert jacks with balanced returns

MIDI mute system with 128 patches

8 independent mute groups

Solo-in-place with QuickSolo feature

Full metering - channel, mix buss and outputs.

Monitor with stereo PFL, local output, 2 phones ...

Simultaneous stereo and mono PFL metering

Output meter selector switches for main or aux

Talkback to L-R, M, groups, matrix, and to each aux

2-track replay to L-R and monitor

The console is constructed using extruded aluminium beams, steel panels and

3mm thick metal side plates to ensure rigidity and mechanical reliability on the road,

as well as easy flightcasing. Individual circuit assemblies are accessible by removal

of the steel base. A durable but soft front armrest is provided for comfort. Front,

top and rear write-on strips are provided for channel marking. High quality proven

reliable parts are used throughout. High performance op-amp and discrete circuits

are used to ensure low noise and sonic purity.

The GL4000 reflects our commitment to providing the best audio mixing solutions

and customer support.

OVERVIEW

The GL4000 offers the professional user an uncompromised feature set and

performance for live sound engineering and recording. The console is available in

24, 32, 40 and 48 channel sizes with an external 3U rack power unit. Options

include bolt-on expander module, SYS-LINK interconnect system and 1U dual

power supply monitor/combiner unit. Units from Serial Number 403421 include a

built-in VU Meterpod as standard. An optional VU Meterpod is available for earlier

units.

THE RANGE

The following GL4000 models and options are

available. For further details please contact

your Allen & Heath agent :

GL4000-824 - 24 channel console

GL4000-832 - 32 channel console

GL4000-840 - 40 channel console

GL4000-848 - 48 channel console

The Stereo models can include mic/stereo line

channels dependant on customer specification.

The console is supplied with separate power

supply, DC power cable and mains cable with

moulded plug.

GL4000-8M - 8 mono channels expander

GL4000-4SM - 4 stereo, 4 mono expander

GL4000-4MS - 4 mono, 4 stereo expander

These expander modules are fitted by removing

the console side plate, attaching to the chassis,

and plugging in the harnesses. The console

may be expanded to a maximum of 48 channels.

RPS11 - 300W rack power unit with DC cable

RPSD2 - Dual supply combiner/monitor

1U 19" rack unit which allows two power units to

connect to one console for redundant supply

backup. Also provides local and remote DC rail

LED monitoring.

The Integral Meterpod provides illuminated

moving coil VU metering of the groups, L,R,M

(or monitors, LR sidefill, listen wedge). Also

additional PFL/AFL indicator.

GL4000-SL1 - SYS-LINK expander option

Circuit assembly and multi-pin connector system

which can be fitted to the console to allow

simple interconnection between two consoles

so that one becomes the slave of the second by

linking the audio busses and PFL/AFL system.

SYS-LINK interconnects using two standard

25way D-type cables to any other console fitted

with the SYS-LINK system.

This option should be fitted only by your Allen &

Heath agent or competent service personnel.

DIMENSIONS AND WEIGHTS

Dimensions shown in millimeters. UNPACKED

Width Depth Height Wt (kg)

GL4000M-824 1166 (46") 748 (29.5") 285 (11.2") 47 (104lbs)

GL4000M-832 1421 (56") 748 (29.5") 285 (11.2") 57 (126lbs)

GL4000M-840 1676 (66") 748 (29.5") 285 (11.2") 67 (148lbs)

GL4000M-848 1931 (76") 748 (29.5") 285 (11.2") 77 (170lbs)

GL4000-8M 255 (10") 748 (29.5") 285 (11.2") 9 (20lbs)

RPS11 483 (19") 232 (9.1") 135 (3U) 10 (22lbs)

RPSD2 483 (19") 180 (7.1") 45 (1U) 6 (13lbs)

PACKED

Width Depth Height Wt (kg)

GL4000M-824 1702 (67") 900 (35") 390 (15.4") 82 (181lbs)

GL4000M-832 1702 (67") 900 (35") 390 (15.4") 91 (201lbs)

GL4000M-840 1950 (76.8") 900 (35") 390 (15.4") 100 (221lbs)

GL4000M-848 1931 (76") 900 (35") 390 (15.4") 129 (284lbs)

GL4000-8M 480 (18.9") 830 (32.7") 260 (10.2") 12 (26lbs)

RPS11 575 (22.6") 270 (10.6") 170 (6.7") 11 (24lbs)

RPSD2 520 (20.5") 260 (10.2") 115 (4.5") 6 (13lbs)

SPECIFICATIONS

0dBu = 0.775 Vrms Reference for high level equipment +4dBu = 1.23 V

0dBV = 1 Vrms Reference for low level equipment -10dBV = 310 mV

0VU meter reading = +4dBu at XLR outputs

INPUT GAIN

Mic/Line Input ................. +6dB to +60dB variable

Mic/Line + Pad ............... -14dB to +40dB variable

Line Input ....................... -14dB to +40dB variable

Stereo Line Input ............ off to +10dB variable

2-track Return ................ off to +10dB variable

MAXIMUM OUTPUT LEVEL

Main Outputs .................. +27dBu into load of >600 ohm

Jack Outputs .................. +21dBu into load of >2K ohm

Internal headroom .......... +21dB

FREQUENCY RESPONSE

Measured 20Hz to 20kHz ref 1kHz

Mic to mix (+40dB) ......... +0/-0.5dB

Line to mix (0dB) ............ +0/-0.5dB

DISTORTION

THD + noise measured @ 1kHz +20dBu

Mic to mix (+40dB) ......... 0.006%

Line to mix (0dB) ............ 0.006%

CROSSTALK

Referred to driven channel @ 1kHz

Channel to channel ........ > 100dB

Mute shutoff ................... > 85dB

Fader shutoff .................. > 90dB

NOISE PERFORMANCE

Measured rms 22Hz to 22kHz bandwidth

Mic EIN........................... -128dB 150 ohm source

Line pre-amp (0dB) ........ < -91dBu

Residual output noise ......................... < -98dBu (-102dB S/N)

Mix noise, nothing routed ................... < -87dBu (-91dB S/N)

Mix noise, 24 channels routed ............ < -81dBu (-85dB S/N)

METERING

Input meters ................... 4 segment LED (signal, 0, +6, peak)

Mix meters ...................... 4 segment LED (signal, 0, +6, peak)

Output meters ................ 12 segment LED

LED meter response ...... peak reading

Peak indicators ............... on 5dB before clipping

Signal indicators ............. on -20dBu

Meterpod ........................ Illuminated VU moving coil meters

MODE SWITCHING

Protected underpanel mode switches set the console architecture according to the required application, for example FOH

or stage monitor. Select these using a pointed object.



DIR OUT routes the channel direct out signal

through the aux 10 pre/post selector and

level control.

OUT REV swaps the matrix or LR2 output

jack with the related aux XLR and insert. The

control sections are not swapped. This can

provide matrix outputs on XLR with inserts, or

aux effects sends on jack as required.

TRIM ON routes the group output signal

through a pre/post fader selector and level

trim. This lets you record the groups

independent of the subgrouping to LR and M.

MTX TO AUX Links the matrix mix into the

aux mix to include aux sends from the groups,

LR and M. Used for effects from the groups,

and for quick monitor mixes.

GRP REV reverses the aux (small fader) and

group (main fader) control sections. Also

applies to LR. The outputs remain unaffected.

This mode is used for stage monitoring.

MONO MODE converts the mono output to

the monitor engineers listen wedge. M AFL

is disabled. The M mix still feeds the insert

and matrix.

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