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 wallplates, a mic input on the front panel, plus a 3.5mm jack on the front for portable music sources.

Product Features

• Four mic inputs on rear mount Phoenix connectors with MIC1 selectable to an optional front mounted XLR
• Four stereo inputs on rear mount phono connectors. An additional front mounted 3.5mm jack socket overrides input 4 phono source
• Two stereo (mono selectable via internal jumper) zones on rear mount Phoenix connectors. An additional two mono zone outputs are available with mix output being selectable from internal jumpers
• Paging and Alarm contact inputs on rear mounted Phoenix connectors allow integration with 3rd party paging stations and fire alarm systems
• Remote control can be achieved via PL-14 Remote connected to the rear mounted RJ45 or custom/3rd party analogue remotes connected to the rear mounted Phoenix connectors
• Individual mix and selectable control of all inputs to Z1 & Z2. Multiple options for configuring mix outputs to Z3 & Z4 (via internal jumpers)
• Gain and 2 band EQ available on all mic inputs with an additional 2 band EQ available on Z1 & Z2 outputs

Product Specifications

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

What's in the Box?

• GR4 Zone Mixer
• 1x Mains Cable (IEC C13 to local mains connector)
• 19x Blanking Bung
• 1x Set of Rack ears
• 4x M3 X 6mm Countersunk Pozi screws
• 2x Header Plug Euroblock 2-Pole
• 2x Header Plug Euroblock 4-Pole
• 10x Header Plug Euroblock 3-Pole
• 1x User Guide (AP10223)
• 1x ROHS Addendum Notes (AP7014).
• 1x Safety Instructions (AP9240/CL1-1)