The GR05 is a 1U rack or desk mount audio zone mixer for installation applications. It has a flexible architecture which allows easy custom configuration by the installer to exactly suit the requirements of the installation. Once installed it presents a simple control interface for day-to-day operation by non-technical staff.
The GR05 has 2 microphone inputs and 3 stereo line inputs. These can be assigned to 4 zone outputs configurable in mono or stereo pairs and controlled by front panel or remote level controls. Ducking, EQ and muting can be configured. Further inputs and outputs are possible using the expander system.

Technical Specifications
0dBu = 0.775 Volts rms, +4dBu = 1.23V rms, 0dBV = 1 Volt rms, -10dBV = 316mV rms

Maximum output level
Impedance balanced +20dBu into 2k ohm

Frequency response
20Hz to 30kHz 0/-1dB

Distortion - measured at +12dBu 1kHz Line in to Output
< 0.005%

Crosstalk measured at 1kHz
Channel shutoff < -90dB
Interchannel < -80dB
Channel pan < -75dB

Noise 22Hz - 22kHz referred to 150 ohm source
Mic EIN -128dB
Line preamp at 0dB gain -91dBu
Mix noise (all routed) < -86dB

Inputs + Output Meters
3 colour LED
Red: Peak: on 5dB before clipping
Yellow: 0dB
Signal: dynamic indication from -12dB

Internal headroom
+20dB

Routing
Assignable 9 in, 4 (x2) Out

Crosspoint Matrix
Output Levels Control High performance VCA system
Routed Direct Internal trimmer -10dBV to +4dBu
Routed via VCA Front panel level control or
External remote level control
Switch operated zone mute option link
Ducking options Internal Trimmer -10dBu
to +4dBu

Ducking - Release fast or slow links
Depth -10dB, -20dB or Mute links
Internal & External Ducking circuits.
Internal Trigger from mic 1
and mic 2 by option links.
External Trigger from opto
isolated input

EQ
Mic Inputs HF/MF Swept Peak/Dip, LF Shelf
Outputs HF Shelf, LF Shelf

Power Supply Internally regulated +/- 15V
Mains Power Internal unit
AC mains input 100 to 230V a.c. @ 47-63Hz
Internally wired to country voltage
Power consumption 18VA max
Mains fuse rating 100-120V a.c. use T630mA 20mm
220-240V a.c. use T315mA 20mm
DC Power Backup External d.c. power supply or batteries
+/-12V to 16V d.c. @ 300mA