Allen & Heath HA-GR3 2 Mic + 2 stereo 4 zone rack mount mixer with ducking. From D.O'B. Sound Pro


D.O'B. Sound is your authorized dealer for Allen and Heath. Feel free to ask us about any Allen and Heath product you are interested in including B Stock availability.


GR3 is a 1U rack-mounting or desktop audio mixer, providing simple yet comprehensive control of background music and paging in bars, restaurants, stores and other leisure / retail environments. Standout features include optional remote wallplates and a mic input on the front panel.Primary Mmic mode,When audio sensed on MIC1 channel and/or PAGE contact closure is sensed then music is faded to pre-set level and MICSs2-4 muted for the duration of the announcement. MIC1 zone select LEDs flash slowly when in priority mic mode,Gain / volume rotary controls can be removed and capped (caps supplied) to prevent unauthorised use.  It includes installer  selectable modes.

Primary and secondary mic modes,Perfect for controlling hierarchal microphone feeds such as simple paging announcements,Emergency mic mode,For use with 3rd party systems in emergency situations. Mutes all inputs except MIC1 on alarm contact closure.Juke box mode,Provides a priority line input to the system for pre-recorded announcements or programme material such as Sports channels.Three versions to suit UK, EU or US standard front panels.RJ45 Link through connector for adding additional controllers (Maximum of two).Connection via standard Cat5e cabling.Rotary Volume control with four source select switches. Let D.O’B. Sound Pro’s experienced audio engineers help you with your Pro Audio needs from Allen and Heath.


  • Entering programming mode allows the following parameters to be adjusted:

  • Ducker attenuation

  • Ducker hold time

  • Ducker release time

  • Music crossfade time

  • Jukebox hold time

  • Jukebox release time







Allen & Heath GR3 specs

Microphone Inputs Mic Input Sensitivity (Gain = Min): 0 dBu
Mic Input Sensitivity (Gain = Max): -50 dBu
Mic Level control (Max): +5 dB
Mic Level control (Min): -80 dB
Mic HPF -3 dB: 150 Hz
Mic EQ LF: ±15 dB fc = 80 Hz
Mic EQ HF: ±15 dB fc = 8 kHz
Mic Frequency Response 20 Hz – 20 kHz: ±1 dB
Mic THD+n @ 0 dBu in 1 kHz: 0.004% 22 Hz - 22 kHz
Mic THD+n @ -30 dBu in 30 dB gain 1 kHz: 0.005% 22 Hz - 22 kHz
Mic Hi Level warning LED (Unity gain): +18 dBu
Clip level (Unity gain): +21 dBu
Stereo Inputs ST Input Sensitivity (Gain link OFF): 0 dBu
ST Input Sensitivity (Gain Link ON): -10 dBu
ST Level control (Max): +6 dB
ST Level control (Min): -76 dB
ST Frequency response 20 Hz – 20 kHz: ±0.5 dB
ST THD+n @ -10 dBu in 1 kHz: 0.015% 22 Hz - 22 kHz
ST THD+n @ 0 dBu in 1 kHz: 0.035% 22 Hz - 22 kHz
Crosstalk from Unselected Channel: -75 dB @ 1 kHz
Zone Output Main Zone Level Control (Max): 0 dB
Main Zone Level Control (Min): -74 dB
Main Zone Hi Lev LED (Unity Gain): +18 dBu
Main Zone EQ LF: ±15 dB fc = 80 Hz
Main Zone EQ HF: ±15 dB fc = 8 kHz
Main Zone Clip Level (Unity gain): +21 dBu
Noise ST Input to Main Zone Output (Unity): -90 dBu 22 Hz - 22 kHz
Mic Input Routed at Min Gain as Well: -88 dBu 22 Hz - 22 kHz
Mic Input Routed at Max Gain: -77 dBu 22 Hz - 22 kHz (150R source)
Power 100 - 240 VAC, 50/60 Hz, 20 W
Power Consumption: 15 W (with no remote attached)
Dimensions (H x L x W) 1.9 x 9.5 x 17.2" / 48.0 x 242.0 x 438.0 mm
Weight 7.5 lb / 3.4 kg
Packaging Info
Package Weight 10.0 lb
Box Dimensions (LxWxH) 20.8 x 14.0 x 9.0"



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