ALLEN&HEATH GR2 Audio Zone Mixer Safety Instructions ............... 3 S Soouunndd C Coonnttrraaccttoorr A Apppplliiccaattiioonnss Introduction ......................... 4 Welcome to the GR2 ........... 5 Features............................... 6 66 M Miiccrroopphhoonnee IInnppuuttss Audio Signal Paths .............. 8 System Function.................. 9 33 S Stteerreeoo LLiinnee IInnppuuttss Connecting Power ...............
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.
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.
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.
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.
Features mic mute ALLEN&HEATH mic priority mic 1 mic 2 mic 3 mics mic 4 mic 5 1 2 GR2 music 4 mic 6 music 1 1 2 music 2 1 2 music 3 music mute alarm music 3 music mute alarm mono < source > mono < source > zone 1 zone 2 < source > 1 2 1 2 AUDIO ZONE MIXER mic mute ALLEN&HEATH mic priority mic 1 mic 2 mics mic 3 mic 4 mic 5 1 2 GR2 music 4 mic 6 music 1 1 2 music 2 1 2 1 2 zone 1 zone 2 < source > 1 2 AUDIO ZONE MIXER ! phantom pwr A B C D on power o
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 Fron
Audio Signal Paths Simplified block diagram GR2 AUDIO ZONE MIXER EXPAND PL-12 WALL PLATE PAGE MIX EXT PAGE IN PAGE EQ MIC MIX 10V LOGIC MIC2 MIC1 UTILITY REMOTE 1 Z1 PAGE ENABLE Z2 PAGE ENABLE MIC MUTE MIC PRIORITY ALARM OVERRIDE MIC PRIORITY MIC4 ZONE REMOTE PL-5 IR CONTROLLER PAGE MIC MIC3 Z1 SOURCE SELECT Z1 LEVEL Z2 SOURCE SELECT Z2 LEVEL 2 3 4 5 1 2 10 5 AUX ZONE2 11 3 12 13 4 14 6 7 8 PL-5 9 MIC MIX AUX MIC EQ MIC6 MIC5 PAGE MIX PHANTOM POWER GAIN / PAD MIC MUTE L MUSI
System Function A B C D GR2 AUDIO ZONE MIXER MIX + - PAGE 1 2 3456 PAGE EQ + EXPAND Detailed block diagram PHANTOM POWER PAD MIC2 + - MIC1 + - MIC4 PK sig + - MIC3 + PK sig TRIM PAD MIC6 + - MIC5 PK sig TRIM PAD ( R - MUSIC 4 - L ) G + - 1 2 3 4 HPF MF F HF 5 11 13 PL- 9 5 VCA 0V MIC EQ CAT5 UTILITY REMOTE ZONE 2 MIX Z1 LEVEL PAGE S + Z2 + Z1 J ZONE 1,2 REMOTE PAGE Z1 ENABLE PAGE Z2 ENABLE MIC MUTE MIC PRIORITY ALARM MUTE Z2 Z2 MUTE CUSTOM WIRED REMOTE
Front Panel – Operator Controls 8 7 1 ALLEN&HEATH mic mute mic priority 9 6 mic 1 mic 2 mic 3 mics 14 mic 4 mic 5 1 2 GR2 music 4 15 13 mic 6 music 1 1 2 1 2 music 2 1 2 music 3 music mute 10 16 alarm mono < source > zone 1 < source > 12 zone 2 1 2 AUDIO ZONE MIXER 3 5 2 17 4 KNOB PRESET 11 PLUG 1. Rack ears 9. Mic mix selected indicators These are supplied fitted ready for 19” rack or furniture mounting.
Rear Panel - Connections 2 1 3 10 CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR. ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS. Z2 FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
Front Panel – Configuration Settings ALLEN&HEATH mic mute mic priority mic 1 mic 2 mic 3 mics 1 2 GR2 mic 4 mic 5 music 4 mic 6 1 2 music 1 1 2 music 2 1 2 music 3 music mute alarm mono < source > zone 1 < source > To access the configuration settings remove the 3x M3 hex screws securing the front cover plate. Use the 2mm Allen key provided.
mic mute ALLEN&HEATH mic priority mic 1 mic 2 mic 3 mics mic 4 mic 5 music 4 1 2 GR2 mic 6 music 1 1 2 music 2 1 2 music mute music 3 1 2 alarm mono zone 1 < source > zone 2 < source > 1 2 AUDIO ZONE MIXER ! phantom pwr A B C D mic enable E F G H on power on on page Z1 Z2 mic1=page mic priority mic 1 2 34 56 pad pad gain trim mic 2 pad pad gain trim mic 3 gain trim mic 4 pad pad gain trim mic 1 pad pad gain trim mic 1 gain trim mic 2 pad gain trim mic 5 gain tr
Remote Control – Zone Level and Source Selection CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR. ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS. Z2 FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
Remote Control – PL-12 Wall Plate CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR. ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS. Z2 FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
Remote Control – Utility CAUTION: RISK OF ELECTRIC SHOCK. DO NOT OPEN. AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR. ATTENTION: REMPLACER PAR UN FUSIBLE STRICTEMENT IDENTIQUE EN VALEURS. Z2 FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
Installation 483mm 19" 44mm 48mm 1.7" 1.9" 1U 434mm 17" ALLEN&HEATH mic mute mic priority mic 1 mic 2 mic 3 mics mic 4 1 2 GR2 mic 5 music 4 mic 6 1 2 music 1 1 2 music 2 1 2 music 3 music mute alarm mono < source > zone 1 < source > zone 2 1 2 AUDIO ZONE MIXER Remove 2x rack ears M3 Torx T10 307mm 12" 232mm 9.1" REMOVE 4x FEET 75mm 3" Rack mount Desk mount The GR2 is shipped with the two rack mount ears already fitted.
Application Example 1 – Two Room Bar or Restaurant ALLEN&HEATH mic mute mic priority mic 1 mic 2 mic 3 mics mic 4 mic 5 music 4 mic 6 1 2 1 2 MIC1 LIVE MIC2 KARAOKE GR2 music 1 1 2 music 2 music mute music 3 alarm mono zone 1 < source > zone 2 < source > 1 2 1 2 AUDIO ZONE MIXER PAGE MC JUKEBOX BGM SATELLITE LOUNGE/BAR RESTAURANT AUX = SUB BASS or PAGE LOBBY CD (Background music) ALARM ZONE 2 WALL PLATE (Music mute and evacuation message) RESTAURANT ZONE 1 WALL PL
Application Example 2 - Conference ALLEN&HEATH mic mute mic priority mic 1 mic 2 mic 3 mics mic 4 mic 5 1 2 GR2 music 4 mic 6 music 1 1 2 1 2 music 2 music 3 music mute alarm mono zone 1 < source > < source > zone 2 1 2 1 2 AUDIO ZONE MIXER CHAIRMAN PRES 1 PRES 2 PRES 3 PRES 4 PRES 5 PROJECTOR VIDEO CD PRESENTATION MICS AUX = RECORDING ZONE 2 ZONE 1 LR SPEECH REINFORCEMENT CEILING SPEAKERS STEREO PRESENTATION SOUND SCREEN PRESENTATION CHAIRMAN PRESENTERS QUESTIO
Specification System Output level control VCA signal path Front panel or remote DC control Paging Configured independently to zone 1 and 2 Triggered by page mix signal presence Threshold -20dB Ducking depth -20dB Music 1 priority Configured independently to zone 1 and 2 Triggered by music 1 signal presence Threshold -20dBu Release time selectable short = 2 seconds, long = 12 seconds Routing Zone 1 = music only, or music+mic mix Zone 2 = nothing (page only), music, mic mix, or music+mic mix Aux = any
Remote control Zone level 0V = off, +10V DC = fully on Zin = 10k ohm Source select Off = 0V, music1=+2V, music2=+4V, music3=+6V, music4=+8V Zin = 10k ohm Utility switches Zone 1 page enable, zone 2 page enable, mic mute, mic priority, alarm Held at +5V DC through diode and 10k ohm, switch to 0V (ground) to activate DC voltage Internal +10V DC, max total current = 300mA (100mA per pin) Protected against short circuit by a resettable fuse Cable CAT5 UTP or STP, maximum recommended length 100 metres
A B C D phantom pwr ALLEN&HEATH WH/OR OR WH/GN BL WH/BL GN WH/BN BN gain trim mic 4 pad 3 mic 3 AUX 5 4 MIC 3 UTILITY REMOTE R Z1 L ZONE OUT level trim MIC 4 1 2 3 4 5 6 7 8 WH/OR OR WH/GN BL WH/BL GN WH/BN BN CUSTOM WIRING on AUX G G Z1 Z1R + - AUX + - 2 1 2 music 2 1234 - Z1L + G 3 R 3 L HPF GR2 User Guide ZONE 1 1 2 ZONE P1 1 2 3 4 5 6 7 8 400 200 1 R 1 L FREQ 5k 2k - P2 G G G MIC 6 + - 6 MUSIC 1 PL-5 PRESETS 1234 CN2 CN1 P4 P1 ZONE 2 MUS
GR2 User Guide 23 AUDIO ZONE MIXER GR2 ALLEN&HEATH SETTINGS mic mute mic priority ALLEN&HEATH GR2 mic 1 mic 2 mic 3 1 2 mics (PROVISIONAL) mic 4 OPERATOR SHEET mic 5 1 2 music 4 mic 6 1 2 music 1 1 2 music 2 1 2 music 3 music mute alarm 2 3 4 5 4 5 zone 2 3 < source > 1 zone 1 2 < source > 1 mono CONTACT
GR2 User Guide