The Story
Allen & Heath GR4 Rackmount Zone Mixer (GR-4)
GR4 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 wall plates, a mic input on the front panel, plus a 3.5 mm jack on the front for portable music sources.
FEATURES
- Mixing: Individual mix and selectable control of all inputs to Z1 & Z2. Multiple options for configuring mix outputs to Z3 & Z4 (via internal jumpers)
- Dynamics: Gain and 2 band EQ available on all mic inputs with an additional 2 band EQ available on Z1 & Z2 outputs
- Primary Mic Mode: When audio sensed on MIC1 channel and/or PAGE contact closure is sensed then music is faded to pre-set level and MICSs 2-4 muted for the duration of the announcement. MIC1 zone select LEDs flash slowly when in priority mic mode
SPECIFICATIONS
- 19-inch 4-channel zone mixerblack/grey, clear layout
- compact 1U design, 19-inch rack-mountable
- separate peak and signal LED indicators per channel
- page and alarm inputs for smoke detectors
- Z1 and Z2 fully controllable, Z3 and Z4 volume only
- inputs:microphone (balanced): 1x XLR (front), 4x 3-pin Phoenix terminal block
- line inputs (unbalanced): 4x stereo RCA
- zones (balanced): 2x stereo 3-pin Phoenix terminal block and 2x mono 3-pin Phoenix terminal block
- remote: 2x 4-pin Phoenix terminal block, 1x RJ45
- alarm/page: 2x 2-pin Phoenix terminal block
- AUX in (mini jack on front)
- power cable
- controlsvolume MIC 1 through 4
- volume ST 1 through 4 (line)
- Z1 and Z2: volume mic and music, LF and HF
- Z3 and Z4: volume
- MIC 1 through 4 (rear): 4x low, high and gain
- switchesfront/rear (mic input option)
- Z1: 2x SEL (mic selection, music or both)
- Z2: 2x SEL (mic selection, music or both)
- power on/off
- dip switches (rear): 4x vox/jukebox, 4x zone lock, 4x remote, 4x logic/pp on or off (off by default)
- frequency response: 20 Hz – 20 kHz (+/- 0.5 dB)
- power supply: AC adapter
- dimensions: 438 x 242 x 48 mm (19 inches, 1 U)
- weight: 3.4 kg
FAQ
Is warranty coverage available for my product?
Yes! Majority of our product provides a minimum 1 year warranty on the electronic parts.
Can I test the product prior to my purchase?
Definitely! You can contact our sales team through 011-6862 1286 or head over to Music Bliss showroom to view the item before buying it. We are honored to have you over!
How long will it take to deliver?
It usually takes only 3-7 working days for the item to be safely delivered to your doorstep. Self-collection and Lalamove (local delivery) is available as well!
Can I self-collect my item(s)?
Of course! You can head over to Music Bliss showroom for self-collection during our working hours.
10am - 7.30pm (Mon - Thurs)
10am - 7pm (Fri - Sat)
10am - 6pm (Sun)
Can I use Lalamove / Grab / Same Day Delivery as a delivery option?
Yes! Please note that the delivery hour for Lalamove service is only available for local delivery, from 11am to 5pm daily. For delivery ,please check out choosing Lalamove/Grab service or contact the mainline 011-6862 1286.

Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
Allen & Heath GR4 Rackmount Zone Mixer (GR-4)
GR4 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 wall plates, a mic input on the front panel, plus a 3.5 mm jack on the front for portable music sources.
FEATURES
- Mixing: Individual mix and selectable control of all inputs to Z1 & Z2. Multiple options for configuring mix outputs to Z3 & Z4 (via internal jumpers)
- Dynamics: Gain and 2 band EQ available on all mic inputs with an additional 2 band EQ available on Z1 & Z2 outputs
- Primary Mic Mode: When audio sensed on MIC1 channel and/or PAGE contact closure is sensed then music is faded to pre-set level and MICSs 2-4 muted for the duration of the announcement. MIC1 zone select LEDs flash slowly when in priority mic mode
SPECIFICATIONS
- 19-inch 4-channel zone mixerblack/grey, clear layout
- compact 1U design, 19-inch rack-mountable
- separate peak and signal LED indicators per channel
- page and alarm inputs for smoke detectors
- Z1 and Z2 fully controllable, Z3 and Z4 volume only
- inputs:microphone (balanced): 1x XLR (front), 4x 3-pin Phoenix terminal block
- line inputs (unbalanced): 4x stereo RCA
- zones (balanced): 2x stereo 3-pin Phoenix terminal block and 2x mono 3-pin Phoenix terminal block
- remote: 2x 4-pin Phoenix terminal block, 1x RJ45
- alarm/page: 2x 2-pin Phoenix terminal block
- AUX in (mini jack on front)
- power cable
- controlsvolume MIC 1 through 4
- volume ST 1 through 4 (line)
- Z1 and Z2: volume mic and music, LF and HF
- Z3 and Z4: volume
- MIC 1 through 4 (rear): 4x low, high and gain
- switchesfront/rear (mic input option)
- Z1: 2x SEL (mic selection, music or both)
- Z2: 2x SEL (mic selection, music or both)
- power on/off
- dip switches (rear): 4x vox/jukebox, 4x zone lock, 4x remote, 4x logic/pp on or off (off by default)
- frequency response: 20 Hz – 20 kHz (+/- 0.5 dB)
- power supply: AC adapter
- dimensions: 438 x 242 x 48 mm (19 inches, 1 U)
- weight: 3.4 kg
FAQ
Is warranty coverage available for my product?
Yes! Majority of our product provides a minimum 1 year warranty on the electronic parts.
Can I test the product prior to my purchase?
Definitely! You can contact our sales team through 011-6862 1286 or head over to Music Bliss showroom to view the item before buying it. We are honored to have you over!
How long will it take to deliver?
It usually takes only 3-7 working days for the item to be safely delivered to your doorstep. Self-collection and Lalamove (local delivery) is available as well!
Can I self-collect my item(s)?
Of course! You can head over to Music Bliss showroom for self-collection during our working hours.
10am - 7.30pm (Mon - Thurs)
10am - 7pm (Fri - Sat)
10am - 6pm (Sun)
Can I use Lalamove / Grab / Same Day Delivery as a delivery option?
Yes! Please note that the delivery hour for Lalamove service is only available for local delivery, from 11am to 5pm daily. For delivery ,please check out choosing Lalamove/Grab service or contact the mainline 011-6862 1286.























