Allen&Heath GR05 - Manual (Page 5)

GR05 User Guide 5
The System
The following diagram shows the GR05 in a typical sound contractor installation.
This combines paging microphones with background music sources feeding up
to 4 speaker zones. An alarm interface and battery backup are included to
ensure crowd control in the event of a fire or power failure. Remote level
controls are wall mounted for local speaker control.
Each installation has its own particular combination of input/output and control
requirements. For this reason the GR05 offers a uniquely flexible architecture
that can be installer configured for each application. We recommend that you
take time to fully understand the full capabilities of this unit and carefully plan the
most suitable configuration.
Paging Microphone
12,18
This is the microphone used by the receptionist to call
for or ‘page’ staff or customers. It is set so that speaking
into the mic automatically overrides the background
music by reducing its level. This is known as ‘voiceover’
or ‘ducking’.
Announcement Microphone
12,18
Similar to the paging mic but usually kept behind the bar
or counter for occasional announcements or special
function use. Can be set to duck music sources, or be
itself ducked by the announcer for example when being
used as the karaoke mic.
Line Inputs
14
These are commonly the cassette or CD inputs for
background music. They may be stereo or mono.
Jukebox
19
The jukebox provides music selected and paid for by the
customer. As such it is a priority source that
automatically overrides any other background music
playing at the time.
Evacuation Alarm
19
It is often a safety requirement to link the audio system
to the fire alarm for automatic playback of an evacuation
message should the alarm be triggered. The pre-
recorded signal would override any background music
source.
Power Input
9
The GR05 has a built in mains operated power supply.
An additional input is provided to connect a backup
supply such as a battery unit which automatically takes
over should the mains power fail. This is important when
the unit is linked to an alarm system as described above.
Remote Level Control
17
+10V DC control inputs allow the GR05 VCA output
levels to be adjusted by volume controls positioned
away from the unit such as wall plates.
Zone Outputs
15
These provide 4 separate feeds to the amplifiers driving
the speakers in different areas or ‘zones’.
AUDIO ZONE MIXER
mic/line 2
ALLEN&HEATH
GR05 mic/line 1 st line 3 st line 4 st line 5 out 1 out 3 out 2 out 4 ducking mute power