Allen & Heath AR84 8×4 I/O rack audio expander for SQ, Qu, Avantis and AHM systems
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The Allen & Heath AR84 8×4 I/O rack audio expander for SQ, Qu, Avantis and AHM systems is a portable remote audio rack for a digital mixing system.
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The Allen & Heath AR84 8×4 I/O rack audio expander for SQ, Qu, Avantis and AHM systems is a portable remote rack audio expander for a digital mixing system. Allen & Heath AR84 remote provides 8 XLR inputs and 4 XLR outputs and must be wired to add additional inputs and outputs. The XLR sockets must be of the same or higher quality and specification as those on the digital mixing system and must appear in the soft patch of the digital mixing system for assignment to channels. The audio connection is via Cat5 cable using Allen & Heath’s dSNAKE Ethernet protocol, allowing the remote audio rack to be located up to 100 m from the mixer or extended audio rack. The Ethernet protocol provides remote preamp control, and all mic preamps are callable from the digital mixing system. The firmware of the Allen & Heath AR audio expander is automatically updated when it is connected to the digital mixing system. The local Ethernet port is an RJ45 socket with EtherCon locking ring. It is also possible to connect the Allen & Heath AR0804 to a main AudioRack unit to add an additional 8 XLR inputs and 4 XLR outputs from that location. This connection is via an ‘Expander’ connection and is also an RJ45 socket with EtherCon locking ring. The remote audio rack is compatible with Allen&Heath digital mixers. The Allen AR Expander is a rugged, rack-mountable 19″ steel chassis with a height of 1U. It has a built-in power supply that accepts AC mains voltages of 100~240V, 50/60 Hz, 20W max via a 3-pin grounded IEC male connector mounted on the rear of the chassis. A switch should be provided near the mains input to isolate the mixer from the incoming power supply. The recommended operating temperature for the Allen & Heath AR audio remote expander is between 5 and 35 degrees Celsius.
Flexible connections
Allen & Heath’s audio expanders offer flexible inputs and outputs for advanced configurations. They can include XLR, TRS and Dante ports for digital audio networks. These devices expand the capacity of mixers, providing a greater variety of audio sources and destinations. AES3 and S/PDIF connections are often present to ensure superior audio quality in professional settings.
Audio transmission via Dante or S-Link
Allen & Heath’s audio expanders offer a wide range of inputs and outputs, with configurations such as 16 or 32 XLR inputs and 8 or 16 XLR outputs in modules such as the DX168 or GX4816. Connections include Ethernet ports, for audio transmission via Dante or S-Link, and AES outputs for high-quality digital audio transmission.
Advanced compatibility and integration with audio network systems and mixers
Allen & Heath’s audio expanders offer great compatibility with Dante, AES67, S-Link, and MADI protocols. They allow integration with audio network systems and mixers such as dLive, Avantis, and SQ. They support connection via Cat5e or fibre optic to expand inputs and outputs. This flexibility makes them ideal for complex live and broadcast installation applications.
Technical specifications
| Dimensions | 48,2 x 20,5 x 4,8 cm |
| Input | XLR Mic/Line input: XLR balanced, +48V phantom power supply Microphone/line preamplifier: Fully recallable Input sensitivity: -60 to +15dBu Analog gain: +5 to +60 dB, in 1 dB increments Pad: -20dB active pad Maximum input level: +32dBu (PAD in) Input impedance: >4kΩ (Pad out), >10kΩ (Pad in) |
| Output | Analog XLR outputs: Balanced, relay protected Output impedance: <75Ω Nominal output: +4dBu = 0dB meter reading Maximum output level: +22dBu Residual output noise: -91dBu (quiet, 20-20kHz) |
| Compatibility | SQ, Qu, Avantis, AHM-64, GLD |
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