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Allen & Heath

Allen & Heath GR4 Mixer

SKU: GR4/240X
Allen & Heath GR4 Mixer
Allen & Heath GR4 Mixer
Click to enlarge

    £811.00 inc VAT
    £675.83 ex VAT

    Available on back-order|Available from 31 Jul 2026

    Backorder – Available from 31 Jul 2026
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    1 Year Manufacturer Warranty Included
    About Stage Supply
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    About this Product

    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 and retail environments. Standout features include optional remote wall plates, a front panel mic input and a 3.5mm jack output for headphone monitoring.

    Allen & Heath GR4 front panel

    Inputs

    Mic + Line Inputs

    4 × mic inputs on rear Phoenix connectors — MIC1 selectable to a front-mounted XLR. 4 × stereo inputs on rear phono connectors, plus a front-mounted 3.5mm jack.

    Outputs

    Zone Outputs

    2 × stereo zones (mono selectable via jumper) on rear Phoenix connectors, plus 2 × additional mono zone outputs — 4 zones total.

    Integration

    Paging + Alarm

    Paging and alarm contact inputs on rear Phoenix connectors for integration with 3rd party paging stations and fire alarm systems.

    Control

    Remote Ready

    Remote control via PL-14 wall plate on rear RJ45, or custom/3rd party analogue remotes on rear Phoenix connectors.

    GR4 controls close-up

    Configurable

    Installer Selectable Modes

    Primary + Secondary Mic modes control hierarchical mic feeds for simple paging announcements.

    Emergency mode integrates with 3rd party systems — mutes all inputs except MIC 1 on alarm contact closure.

    Jukebox mode provides a priority line input for pre-recorded announcements or programme material such as sports channels.

    PL-14 remote wall plate

    Remote Control

    PL-14 Compatible

    The PL-14 is an intelligent remote controller for the GR4, giving non-technical operators local control of music source selection and/or audio level. Up to two controllers can be connected — one for each zone, or a single unit to simultaneously control both zones.

    A menu of setup options allows the installer to configure its functions to suit the specific application.

    Applications

    Built for Installed Audio

    GR4 is engineered for the practical demands of hospitality and retail installs — background music distribution, live announcements, emergency paging and integration with fire alarm systems, all in a single 1U unit.

    Rack mount or desktop deployment, rear-panel Phoenix connectivity throughout for clean, professional installation.

    GR4 Specifications

    • 4 × mic inputs on rear Phoenix connectors (MIC1 selectable to front XLR)
    • 4 × stereo line inputs on rear phono connectors
    • Front panel 3.5mm jack input
    • 2 × stereo zone outputs on rear Phoenix (mono selectable via jumper)
    • 2 × additional mono zone outputs (4 zones total)
    • Front panel 3.5mm headphone monitoring output
    • Paging + alarm contact inputs (rear Phoenix)
    • Installer selectable modes: Primary/Secondary Mic, Emergency, Jukebox
    • PL-14 remote wall plate compatible (rear RJ45)
    • 3rd party analogue remote compatible (rear Phoenix)
    • Up to 2 × PL-14 controllers (per zone or combined)
    • 1U rack mounting or desktop use

    More Information

    General

    • Mic Input Sensitivity (Gain = Min): 0dBu
    • Mic Input Sensitivity (Gain = Max): -50dBu
    • Mic Level control (Max): +5dB
    • Mic Level control (Min): -80dB
    • Mic HPF -3dB: 320Hz (TBC)
    • Mic EQ LF: +/- 15dB fc = 80Hz
    • Mic EQ HF: +/-15dB fc = 8kHz
    • Mic Frequency Response: 20Hz - 20kHz +/-1dB
    • Mic THD+n @0dBu in 1kHz: 0.004% 22-22kHz
    • Mic THD+n @-30dBu in 30dB gain 1kHz: 0.005% 22-22kHz
    • Mic Hi Level warning LED (Unity gain): +18dBu
    • Clip level (Unity gain): +21dBu
    • ST Input Sensitivity (Gain link OFF): 0dBu
    • ST Input Sensitivity (Gain Link ON): -10dBu
    • ST Level control (Max): +6dB
    • ST Level control (Min): -76dB
    • ST Frequency response 20Hz: 20Hz - 20kHz +/-0.5dB
    • ST THD+n @-10dBu in 1kHz: 0.015% 22-22kHz
    • ST THD+n @0dBu in 1kHz: 0.035% 22-22kHz
    • Crosstalk from unselected channel: -75dB @ 1kHz
    • Main Zone Level control (Max): 0dB
    • Main Zone Level control (Min): -74dB
    • Main Zone Hi Lev LED (Unity gain): +18dBu
    • Main Zone EQ LF: +/-15dB fc = 80Hz
    • Main Zone EQ HF: +/-15dB fc 8kHz
    • Main Zone Clip level (Unity gain) : +21dBu
    • ST Input to Main Zone output (Unity): -90dBu 22-22kHz
    • Mic Input routed at Min gain as well: -88dBu 22-22kHz
    • Mic Input routed at Max gain: -77dBu 22-22kHz (150R source)
    • Power consumption: 15W

    Physical & Dimensions

    • Height: 48mm
    • Length: 242mm
    • Width: 438mm
    • Weight: 3.4kg

    Manuals & Downloads

    PDFUser ManualPDF
    PDFTech SpecsPDF

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    Frequently Asked Questions

    Stage Supply is the retail arm of Moventra Group. We’re a working touring and events production company founded in 2020 by sound engineers with many years of experience. 

    We’re very selective about the products we sell. Everything we supply we use ourselves on our tours, events and productions. This means we can offer a level of buying advice and aftersales support that can’t be beaten.

    We’re official dealers of brands such as Allen & Heath, Audio Technica and sE Electronics. We also stock other leading brands including Shure, Sennheiser, Martin Audio and Chauvet Professional.

    We accept Debit & Credit Cards, Apple Pay, Android Pay and Paypal. We also offer finance through Paypal Credit and Klarna.

    Business Customers can choose to receive a Proforma Invoice on checkout to pay by bank transfer.

    Yes. We run a AV Production business (Moventra) and have AV Engineers on hand to provide advice and technical support during our operating hours.

    The quickest way to contact us for advice and support is through WhatsApp or Email.

    Stage Supply is a division of Moventra, which is a AV Production Company. We share staff and our premises with Moventra which allows us to keep our costs down.

    As AV Engineers ourselves, our mission is to provide high quality equipment to other AV Professionals at reasonable prices.

    Please see our Returns page for information on our returns policy and to start a return online.

    Generally if you change your mind you can return your item for a full refund within 14 days of purchase - as long as the product is unopened and unused. 

    If an item is faulty or damaged we will arrange collection free of charge and repair/replace it as quickly as possible.

    Estimated delivery times are shown on the product page. For items in stock we aim to get your order to you within 1 - 3 working days.

    Some items are ordered directly from the manufacturer. These may have longer lead times which will be estimated on the product page. Please contact us for a more accurate lead time.

    Yes. You can collect from our Production Space in Wembley, London. Please note that only a small range of our products are stored here, items showing as in stock may need to be transferred from our warehouse. If the item is in stock it will usually be ready to collect the same or next working day.

    Yes. Through Moventra we can install across the UK. 

    We've been involved in installation projects ranging from large capacity Music Venues to Coffee Shops, Churches and Council Offices.

    Please click here to contact us to learn more about our installation service.