Description
GR4 OVERVIEW
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.
GR4 FEATURES
- Connectivity
- MIC INPUTS
- Four mic inputs on rear mount Phoenix connectors with MIC1 selectable to an optional front mounted XLR.
- LINE INPUTS
- Four stereo inputs on rear mount phono connectors. An additional front mounted 3.5mm jack socket overrides input 4 phono source.
- ZONE OUTPUTS
- 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.
- CONTROL
- Paging and Alarm contact inputs on rear mounted Phoenix connectors allow integration with 3rd party paging stations and fire alarm systems.
- REMOTE
- 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.
- 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 MICs2-4 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.
- INSTALLER SELECTABLE MODES, INCLUDING:
- 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.
- ADVANCED FEATURES
- 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
Specifications
- 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
- Noise: -90dBu 22-22kHz
- ST Input to Main Zone output (Unity): -88dBu 22-22kHz
- Mic Input routed at Min gain as well: -77dBu 22-22kHz (150R source)
- Mic Input routed at Max gain
- Power consumption: 15W
- GR4 unit (no remote attached)
Weights & Dimensions
- Height: 48mm (1.9”)
- Length: 242mm (9.5”)
- Width: 438mm (17.2”)
- Weight: 3.4kg (7.5lbs)
