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GR2
Audio Zone Mixer
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USER GUIDE
INSTALLATION
Publication AP6320
Safety Instructions ............... 3
Introduction ......................... 4
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
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Summary of Contents for ALLEN & HEATH GR2
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Page 1: User Guide
ALLEN&HEATH Audio Zone Mixer Safety Instructions ....3 Introduction ......4 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 .... -
Page 2: Limited One Year Warranty
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 Copyright © 2005 Allen & Heath Limited. All rights reserved Whilst we believe the information in this guide to be reliable we do not assume responsibility for inaccuracies. -
Page 3: Important Safety Instructions
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. GR2 User Guide... -
Page 4: Important Mains Plug Wiring Instructions
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. - Page 5 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.
- Page 6 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 GR2 User Guide...
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Page 7: Front Panel Controls
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... -
Page 8: Audio Signal Paths
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. -
Page 9: System Function
System Function Detailed block diagram GR2 AUDIO ZONE MIXER PAGE EQ EXPAND 1 2 3456 PAGE A B C D PHANTOM POWER Z2 FOLLOW Z1 (ROOM COMBINING) PAGE MIX WALL PLATE DISABLE WIRING OPTIONS TRIM MIC1 MIC1 PAGE LEVEL MIC2... -
Page 10: Input Level Controls
MC override using mic 1 (2). The red Sums the stereo zone L and R signals for mono indicator lights when priority is selected either by this operation. switch or remote control. The priority function does not affect the paging mic. GR2 User Guide... -
Page 11: Rear Panel Connections
Press to switch on or off. 0dBu external line level signal to the mic mix. Plug another GR2 in to expand the number of mic inputs. To avoid power up thumps, make sure power This input is muted when mic priority is active. -
Page 12: Dip Switch Settings
Adds the mic mix to the aux output. Zone 1 mix to aux Adds the zone 1 mix to the aux output. Sums L and R into mono. Zone 2 mix to aux Adds the zone 2 mix to the aux output. GR2 User Guide... - Page 13 12dB/octave low pass (high cut) filter with 100Hz turning point frequency. Switch this in when using the aux output to feed a sub bass speaker without a crossover. mic HPF mic MF mic HF zone 1 EQ aux SUB FILTER 180Hz 5kHz 20Hz 400Hz 100Hz GR2 User Guide...
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Page 14: Connecting Power
CAT5 cable run. Use standard CAT5 UTP or STP cable terminated 1k ohm 4k7 ohm with an RJ45 plug at the GR2 and wired to the circuit at the wall SOURCE linear plate. Wire the circuit according to the RJ45 pin numbers shown 1k ohm here. -
Page 15: Pl-12 Wall Plate
4 presets of level, source selection and The PL-12 can be reset to factory default zone 2 follow 1 setting. The installer can store these during (settings shown in bold above). installation, then disable store to prevent them being overwritten by the operator. GR2 User Guide... - Page 16 100mA from the +10V pin. The internal 10V supply is protected against a short circuit using a resettable fuse. If it trips, turn off the GR2, wait a few seconds and turn it back on again.
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Page 17: Installation
The GR2 weighs 3.6kg (8 lbs). Make sure the rack or shelf used is able to support the weight of the mixer and other equipment positioned next to it. - Page 18 1 music selection and routed through the built-in 100Hz crossover. The fire alarm provides a switch to mute the music, and keep the paging channel live. The GR2 can also accept a pre-recorded evacuation message. Wall plates provide local level and source selection control in both zones.
- Page 19 Alternatively, remote control may be used such as wired plates or third party touch screens which integrate the multi-media systems. The GR2 provides a good solution for this application as it includes many inputs (6 mic and 3 stereo lines), independent mono and stereo zone and a utility aux output in a compact, affordable unit.
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Page 20: Specification
Residual output noise (zone level min) <-91dBu Mix noise (one selection, (zone level max) < -85dBu Power supply Mains Power Input 3pin IEC male socket Universal mains input 100-240V.AC 47-63Hz 25VA max Supplied with country dependent mains power lead Fuse T1AL 250V 20mm GR2 User Guide... -
Page 21: Source Select
Height 48mm (1.9”) Depth 235mm (9.3”) * Weight Unpacked 3.6kg (8lb) Note * Depth does not include connector plugs. Allow at least 75mm (3”) extra for the cables GR2 AUDIO ZONE MIXER PAGE EQ EXPAND 1 2 3456 PAGE A B C D... - Page 22 Z2 FOLL Z1 PL OFF Z2 FOLL Z1 PL OFF GR2 User Guide...
- Page 23 GR2 User Guide...
- Page 24 GR2 User Guide...
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