Allen and Heath GR-2 Owners manual

ALLEN&HEATH

GR2

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Audio Zone Mixer

Safety Instructions ............... 3

Introduction ......................... 4

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Welcome to the GR2 ........... 5

Features............................... 6

Audio Signal Paths .............. 8

System Function.................. 9

Connecting Power............... 9

Front Panel ..........................10

Rear Panel ...........................11

Configuration Settings......... 12

Zone Remote Wired ............ 14

PL-12 Wall Plate................... 15

Utility Remote ...................... 16

Installation............................ 17

Applications ......................... 18

Specification ........................ 20

Configuration Sheets........... 22

USER GUIDE

INSTALLATION

Publication AP6320

Limited One Year Warranty

This product has been manufactured in the UK by Allen & Heath Limited 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 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 Limited 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.

In certain territories the terms may vary. Check with your Allen & Heath agent for any additional warranty which may apply.

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.

NOTE: Any changes or modifications to the unit not approved by Allen & Heath could void the compliance of the unit and therefore the user’s authority to operate it.

GR2 User Guide AP6320 Issue 1

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.

Allen & Heath Limited Kernick Industrial Estate, Penryn, Cornwall, TR10 9LU, UK

http://www.allen-heath.com

2 GR2 User Guide

Important Safety Instructions

READ THESE INSTRUCTIONS BEFORE PROCEEDING

This symbol, wherever it appears, alerts you to the presence of uninsulated

dangerous voltage inside the enclosure that may be sufficient to constitute a risk of electric shock.

This symbol, wherever it appears, alerts you to important operating and

maintenance instructions in the accompanying literature.

CAUTION

ATTENTION: RISQUE DE CHOC ELECTRIQUE – NE PAS OUVRIR

Read instructions: Read and retain these safety and operating instructions for future reference.

Heed all warnings printed here and on the appliance. Follow the operating and user instructions printed in this user guide.

Do not remove cover: This appliance contains no user serviceable parts inside. Operate the

appliance with its cover correctly fitted.

Power sources: Connect the appliance to a mains power outlet only of the type described in

this user guide and marked on the rear panel. Use the power cord with sealed mains plug appropriate for your local mains supply as provided with the console. If the provided plug does not fit into your outlet consult your service agent for assistance.

Power cord routing: Route the power cord so that it is not likely to be walked on, stretched

or pinched by items placed upon or against it.

Grounding: Do not remove or tamper with the ground connection in the power cord. Do not

defeat the grounding and polarisation means of the power cord plug. A polarised plug has two blades with one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. When the provided plug does not fit your outlet, consult an electrician for replacement of the obsolete outlet.

Water and moisture: To reduce the risk of fire or electric shock do not expose this appliance

to rain or moisture. Do not place containers of liquids on surfaces where liquid may spill into any openings. Do not expose the appliance to dripping or splashing.

Ventilation: The appliance should be situated so that its location or position does not interfere

with its proper ventilation. Do not obstruct its ventilation openings. If the appliance is to be operated in a rack or other furniture ensure that it is constructed to allow adequate ventilation.

Heat: Do not locate the appliance in a place subject to excessive heat or direct sunlight as this

could be a fire hazard. No naked flame sources such as lighted candles should be placed on or near the appliance.

Servicing: Switch off the equipment and unplug the power cord immediately if it is exposed to

moisture or spilled liquid, if objects have fallen into the openings, if the power cord or plug have become damaged, if the appliance has been dropped, during lightning storms, or if smoke, odour or noise is noticed. Refer servicing to qualified technical personnel only.

Installation: Install and use the appliance in accordance with the instructions printed in this user

guide. Do not connect the output of power amplifiers directly to this appliance. Use audio connectors and plugs only for their intended purpose.

Operating environment Protect the appliance from excessive dirt, dust, smoke, ash, heat and

vibration when operating and storing.

Cleaning Clean the appliance only with a dry, soft cloth.

WARNING: This apparatus must be earthed.

GR2 User Guide 3

Introduction

This User Guide provides a quick reference to the installation and operation of the GR2 audio zone mixer. We refer to two types of user in this guide: The Installer configures the unit for the application and is assumed to have technical knowledge in audio system interconnection and setup. The Operator is the day to day user of the unit and does not require technical knowledge. This guide provides technical information for the installer. A Configuration Sheet is included at the rear of this guide so that the installation settings and instructions for the operator may be logged.

The GR2 offers many configuration possibilities to satisfy the custom requirements of a multitude of architectural and utility sound applications. To take advantage of this capability, we recommend that the installer studies the system block diagram to fully understand its signal flow and control possibilities.

Important Mains plug wiring instructions.

The console is supplied with a moulded mains plug fitted to the AC mains power lead. Follow the instructions below if the mains plug has to be replaced. The wires in the mains lead are coloured in accordance with the following code:

The wire which is coloured Green and Yellow must be connected to the terminal in the plug which is marked with the letter E or with the Earth symbol. This appliance must be earthed.

The wire which is coloured Blue must be connected to the terminal in the plug which is marked with the letter N.

The wire which is coloured Brown must be connected to the terminal in the plug which is marked with the letter L.

TERMINAL

L LIVE BROWN BLACK

N NEUTRAL BLUE WHITE

E EARTH GND GREEN & YELLOW GREEN

WIRE COLOUR

European USA/Canada

4 GR2 User Guide

Welcome to the GR2

The GR2 is a compact 9 in 4 out 1U rack mount analogue zone mixer with 6 mic and 3 stereo line inputs, two zone outputs (1 stereo, 1 mono), and an assignable mono aux output.

It is configured by the installer for a variety of applications by setting front panel DIP switches and presets. These are accessible by removing a cover plate which protects the settings during day-to-day operation, and can be used to mount a custom ident label. Simple controls such as mute, source select and level are available to the operator, or can be plugged to lock their function. A combination of XLR, phono and Phoenix screw terminal connections is provided to conveniently suit both the freestanding and installed applications. Additional connections are provided to input external paging and alarm audio signals, and to expand the number of mics beyond 6 by linking GR2 units. Exceptional capability is provided with functions such as paging, mic priority, music override, alarm input, and independent mic and zone EQ.

Each input channel and zone output is provided with its own level control and signal meter. Level and/or source selection for each zone can be configured for local front panel or remote control using industry standard 10V control. The installer can make simple potentiometer/rotary switch wall plates, interface with third party systems such as AMX, or use the Allen & Heath PL12 wall plates with or without the optional PL-5 infra-red controller. A utility socket allows remote control of page selection, mic muting and priority, and alarm trigger.

Stereo and mono zones each with local or remote source selection and level…

Aux output for additional zone, recording, sub bass feed, mic expander…

Configure as 6 mic / 3 stereo line, or 4 mic / 4 stereo line, mic expander…

Source select or mix all operating modes…

Page ducking, music override, mic priority, alarm override…

Remote control…

GR2 User Guide 5

Features

ALLEN&HEATH

GR2

AUDIO ZONE MIXER

ALLEN&HEATH

GR2

AUDIO ZONE MIXER

power on

100 - 240V~

47-63Hz ~ 25W MAX

WARNING

THIS APPARATUS MU ST BE EARTHED.

GR2

ALLEN&HEATH

GR2

ALLEN&HEATH

mic mic music

prioritymute

mic 3mic 2mic 1 mic 6mic 5mic 4 music 4mics zone 1 zone 2

21

212121

music 3music 2music 1

mute >mono <s ource ><source

21

mic mic music

prioritymute

phantom pwr

mic enable

ABCD

EFGH

!

on

page Z2

56342

mic

1

mic1=page

mic priority

gain trim

mic 1

Z1

mic 3mic 2mic 1

21

pad

gain trim gain trim gain trim gain trim gain trim

mic 2 mic 3 mic 4 mic 5

padpadpad

pad pad

mic 6mic 5mic 4 music 4mics zone 1 zone 2alarmmusic 3music 2music 1

music 1music 2music 3

mic 6

+4

-10+4-10

level trim

212121

mic56=music4

mute >mono < source ><source

21

50

200

music 1 priority

IJKL

+4

20 400 - +

on on

-10 HPF HF

Z2 enable

Z1 enable

long release

AUX

Z2

CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. A VIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.

CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. A VIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR. ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS.

ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS. FOR CONTINUED PROT ECTION AGAINST RISK OF FIRE

FOR CONTINUED PROT ECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.

REPLACE FUSE WITH SAME TYPE AND RATING.

FUSE: T1AL

ZONE REMOTEUTILITY REMOTE

ZONE OUT

Z2

Z1

L

AUX

AUX OUT

OUT

R

MADE IN THE UK BY ALLEN & HEATH LIMITED

G-+

Z2

-G+

Z1R

Z1L

-G+

MUSIC IN

3

2

L

RLRLR

1

6 (4) mic / line inputs

Mic 1 balanced Phoenix terminal plug and XLR, 2-6 Phoenix Selectable +15V phantom power (mic 1,2,34,56) Gain trims and pad switches protected behind front cover plate Mic or line level capability (-60dBu to +20dBu signal sensitivity) Mic priority for chairman override with panel and remote control Mic priority on mic 1 (or 2 if a paging mic is configured on mic 1) Configurable as 6 mic + 3 stereo or 4 mic + 4 stereo inputs Mic / line inputs 5/6 can be configured as stereo music input 4 Music 4 input balanced on Phoenix plug for long cables runs 3 band mic EQ with swept HPF, swept MF and shelf HF

alarm

300

180 5k

MF FREQ

mic EQ

EXPAND IN

2k

MIC MIX

MIC MIXEXPAND IN

G-+

music

remote enable

select

MNOP

QRST

mix

+-+-+-

all

on

sel one

Z2 source

Z1 source

Z2 level

Z1 level

PAGE

-G+

G-+

MIC 6

MIC 5

-G+

G-+

( R - MUSIC 4 - L )

zone source

Z1=music+mics

MIC 2

MIC 4

aux source

aux output

UVWX

on

LF

HF

zone 1 EQ

music

Z2

mics

MIC 1

-G+

MIC 3

-G+

100Hz

sub filter

follow Z2

page mix

follow Z1

mic mix

MIC 1

Mic expander input

0dBu line level balanced on Phoenix plug Aux output can be configured as a 0dBu mic expander send

Dedicated paging channel with 2 sources

Configurable from Mic / line 1 input, and/or Balanced page input on Phoenix plug (ext paging or alarm) Preset page channel EQ for speech intelligibility Ducking of zone program on presence of page mic signal External switching to enable paging to zone 1 and/or zone 2 Aux output can be configured as a page feed to other units

3 (4) stereo line music inputs

+4/-10 level setting protected behind front cover plate One-at-a-time or mix all source selection Independent source selection for each zone Panel or remote level and/or source selection Music source mute switch Stereo input 1 configurable as priority input (jukebox, adverts) Overrides other selections on presence of audio signal Short or long priority release time

6 GR2 User Guide

2 zone outputs, one stereo one mono

0dBu, duplicated on RCA phono and balanced Phoenix Zone 1 configurable as music only or music+mics mix Zone 2 configurable as mics, music or music+mics mix VCAs for page ducking, alarm override and remote level control 2 band zone 1 music EQ with shelving LF and HF Zone 1 stereo/mono switch

Mono Aux output

0dBu, duplicated on RCA phono and balanced Phoenix Configurable as page out, mic mix, zone 1 (mono) or zone 2 Switchable low pass filter for sub bass application

Front panel controls

9 input channels with level and signal/peak meters Input level control provides +6dB boost 2 zones with level, source <> select and signal/peak meters Source active indicators for each zone Mic priority, mic mute, music mute and alarm active indicators

Zone Remote RJ45

CAT5 cable to connect zone 1 and/or zone 2 remote Standard 0-10V DC level control, 0V=off, +10V=on 0-10V stepped for remote selection of up to 4 sources plus off Provides +10V for reference and for remote circuit power

Many remote control possibilities including: Level control using hard wired potentiometer Resistive ladder source select using hard wired rotary switch Resistive ladder source select using 2-pole switches with LEDs Third party control (AMX/Crestron) using 10V interface Optional PL-12 wall plate with IR and extended functions PL-5 hand held IR remote works with PL-12

Utility Remote RJ45

Logic control – switch to ground = active

Provides +10V for remote circuit power Interfaces with third party and custom systems Mute control for mic mix Priority mic override switching Alarm switch mutes all except page channel External page to zone 1, 2 enable

Connections

Phoenix screw terminal plugs for pre-wired installation Standard XLR and RCA phono connectors for plug-and-play RJ45 for CAT5 cable connection to remotes Universal 100-240V.AC IEC mains input

Mechanics

Compact 1U rack or desk mount Removable front plate to access installer configuration settings Dip switches letter coded for installer convenience Level controls can be removed and plugged for protection Bolt-on rack ears provided for 19” rack mounting Plastic feet fitted for desk mounting No need to remove the cover, all settings accessible on front

GR2 User Guide 7

Audio Signal Paths Simplified block diagram

EXPAND

MIC2

MUSIC1

MUSIC2

MUSIC3

EXT PAGE IN

MIC1

MIC3MIC4

MIC5MIC6

MUSIC PRIORITY

L

R

L

R

L

R

MIC MIX

LINE +4/-10

PAGE MIX

PAGE EQ

PAGE MIC

MIC PRIORITY

MIC MIX

MIC EQ

PHANTOM POWER GAIN / PAD

MIC5/6, MUSIC4

SOURCE

< SELECT >

1

2

3

4

< SELECT >

1

2

3

4

GR2 AUDIO ZONE MIXER

UTILITY REMOTE

Z1 PAGE ENABLE Z2 PAGE ENABLE MIC MUTE MIC PRIORITY ALARM OVERRIDE

MIC MUTE

DUCKING

MICS

MUSIC

ZONE2 MIX

MUSIC MUTE

MICS

ZONE1 MIX

ZONE1 EQ

MONO / STEREO

REMOTE CONTROL

LEVEL

10V LOGIC

ZONE REMOTE

Z1 SOURCE SELECT Z1 LEVEL Z2 SOURCE SELECT Z2 LEVEL

PAGE

PAGE MIX

MIC MIX

ZONE1

ZONE2

1

2

3

4

5

1 4

6

7

P

8

L

5

9

AUX

SOURCE

MONO

STEREO

1 2

PL-12 WALL PLATE

PL-5 IR CONTROLLER

1 0

1

3

SUB EQ

ZONE1

ZONE2AUX

ZONE2

AUX

L ZONE1

R

Page mix - Overrides the music/mic selection. The input is from the external

page input and/or from mic 1 if it is configured as a paging mic. The page mix EQ provides high pass and low pass filters tuned for paging speech. The mix routes directly to the zone outputs and is not affected by the output level front panel or remote controls. Signal detected on the page mix causes ducking of any page enabled zone.

Mic mix - The performance or conference mic mix. Depending on the

configuration, the mic mix may comprise 3, 4, 5 or 6 mic inputs being sourced from mics 1-6, 2-6, 1-4 or 2-4. The mix of mic inputs can be routed to the zones via the VCAs, or direct to the aux output. A dedicated mic EQ provides a swept frequency high pass filter, swept frequency peak/dip mid, and shelving high frequency cut/boost tuned to deal with typical live performance or conference microphone mixing.

Music mix - An independent mix of the music sources for each zone. Each

has operator controllable music source selection. The number of sources that can be selected by the operator depends on the configuration, either 2, 3 or 4. Alternatively, all sources can be permanently mixed together. Music 1 input can have priority over the other sources for applications such as jukebox or live / pre-recorded retail announcements. Mics 5/6 can be configured as an additional ‘music 4’ balanced stereo source. This allows either 6 mic / 3 stereo music or 4 mic / 4 stereo music capability.

Zone 1 and 2 VCA mixes - The music plus mic mix for each zone. Zone 1

is stereo, zone 2 is mono. Routed through a VCA, the mix is overridden during paging or when the alarm input is triggered. The mic mix can be added to the pre-VCA music mix. Zone 1 has a 2-band EQ and mono switching.

Aux mix - An independent mono output which can be sourced from any

combination of the page mix, mic mix, post-level zone 1 or zone 2 mix. Applications include routing the page mix only to create a single paging source to daisy chain through other GR2 units, routing mic mix only to expand the number of mics to a second GR2, feeding a conference recorder, or creating a mono sum and filtered sub bass mix to compliment the zone 1 stereo output.

8 GR2 User Guide

Allen and Heath GR-2 Owners manual

Specifications and Main Features

Frequently Asked Questions

User Manual