IMPORTANT - Read before starting

Safety instructions

Before starting, read the Important Safety Instructions printed on the sheet supplied with the equipment. For your own safety and that of the operator, technical crew and performers, follow all instructions and heed all warnings printed on the sheet and on the equipment panels.

System operating firmware

The function of this product is determined by the firmware (operating software) that runs it. Firmware is updated regularly as new features are added and improvements made.

ⓘ Check www.allen-heath.com for the latest version of firmware for the product or the host system.

Software licence agreement

By using this Allen & Heath product and the software within it you agree to be bound by the terms of the relevant End User Licence Agreement (EULA), a copy of which can be found at www.allen-heath.com/legal. You agree to be bound by the terms of the EULA by installing, copying, or using the software.

Further information

Please refer to the Allen & Heath website for further information, knowledgebase and technical support. For more information on setup and mixing functions please refer to the Firmware Reference Guides available for download at www.allen-heath.com.

You can also join our Allen & Heath Digital Community to share knowledge and information with other users.

General precautions

• Protect the equipment from damage through liquid or dust contamination. 
• If the equipment has been stored in sub-zero temperatures allow time for it to reach normal operating temperature before use at the venue. Recommended operating temperature is 0 to 40 degrees Celsius.
• Avoid using the equipment in extreme heat and direct sunlight. Make sure the ventilation slots and fans are not obstructed and that there is adequate air movement around the equipment.
• Clean the equipment with a soft brush and dry lint-free cloth. Do not use chemicals, abrasives or solvents. Do not use lubricant or contact cleaner on faders.
• It is recommended that servicing is carried out only by an authorised Allen & Heath agent. Contact details for your local distributor can be found on the Allen & Heath website. Allen & Heath do not accept liability for damage caused by maintenance, repair or modification by unauthorised personnel.

Register your product

Register your product online at www.allen-heath.com/register.

Warranty

A limited manufacturer's warranty applies to this product, the conditions of which can be found at www.allen-heath.com/legal.

Packed items

Check you have received the following:

• GX4816 expander
• Safety Sheet
• IEC mains lead

Introduction

The GX4816 is an I/O Expander for Allen & Heath 96kHz digital mixing systems. It provides 48 remote controlled mic/line preamps and 16 XLR line outputs, as well as 2 DX ports for further system expansion. When connected to an SQ or Avantis, connection to a ME personal mixing system is possible via the DX2 port. The GX4816 connects to the mixing system over a single Cat5e cable.

Installing the Expander

Free standing

The Expander can be operated as a freestanding unit for shelf or floor use.

ⓘ Ensure adequate air flow around the unit. It must not be covered in any way. Always stand the unit on a firm flat surface away from any soft furnishings or carpet.

Rack mounting and flight casing

The GX4816 is designed as a 19-inch rack mount unit and occupies 5U of rack space. The plastic feet may need to be removed before rack mounting; retain them for future use.

For rental, touring and other portable use, we recommend that you use a professional grade flight case.

ⓘ Ensure natural convection of airflow around the unit by allowing good ventilation below, in front of and behind the unit. Rack equipment known to produce a significant amount of heat should not be mounted directly below the unit. Forced convection by means of a rack mounted fan-tray may be desirable in situations where space is restricted and the ambient air temperature is high.

Rack ears

The rack ears can be detached for shelf or floor operation. They are secured to the sides of the Expander with 3 screws each as indicated below. Use a Pozidriv screwdriver to remove the rack ears. Fix in place using the M6*12 countersink pozi screws provided, with a torque setting of 6N-m.

Front Panel

1. Input sockets – Balanced XLR mic/line inputs with +48V Phantom Power indicator. The preamps are built into the GX4816 and their Gain, Pad and +48V are controlled from the mixer via the Cat5 link.

   The +48V indicator detects voltage at the socket whether supplied by the GX4816 or received from an external source.

2. Output sockets – Balanced XLR outputs operating at nominal +4dBu level.
3. Mains power – IEC connector and power switch for the built-in universal voltage PSU. This accepts voltages from 100 to 240V AC. Secure the cable to the plastic P-clip using a T20 screwdriver. ⓘ Heed the safety warnings printed on the panel.
4. Status indicators – The Ready indicator lights up when the output sockets are ready to pass audio after power up. Power indicates the correct functioning of the PSU.
5. GX port – EtherCon port for connection to the mixing system over Gigabit Ethernet. A single Cat5e (or higher) cable carries multichannel audio at 96kHz and control.
6. DX ports – EtherCon ports for connection of DX Expanders over Fast Ethernet. Each cable carries 32x32 channels of 96kHz audio and control. Connect a single DX32, or up to 2x DX168 / DX164-W / DX012 per port.

ⓘ DX1 and DX2 on this device cannot be used for redundancy purposes.

ⓘ SQ / Avantis only: When connected to a ME-U, ME-1 or ME-500, the DX2 port is self-configured as a 40ch, 48kHz output only port for the ME personal mixing system. Channel names and stereo links are communicated to connected ME systems, and the ME output patch temporarily replaces the output patch to the DX2 port.

Rear Panel

1. Vents – Ensure good ventilation and avoid obstruction of vents while operating. Avoid dirt or liquid ingress.
2. Fan – Ultra-quiet fan. Make sure the ventilation opening is not obstructed.
3. Kensington Lock - A slot for fitting standard Kensington anti-theft security devices.

Connect and power up

Connection to the mixing system

Connect the GX Expander to the mixing system SLink port or gigaACE card.

ⓘ Refer to www.allen-heath.com for cable requirements, recommendations, and a list of CAT5 cables available to order.

ⓘ Check www.allen-heath.com for the latest version of mixer firmware. Update to the latest version of firmware before connecting the GX Expander. The unit might operate incorrectly or fail to connect when running earlier firmware.

Switch on the mixer first, then the GX Expander. The GX port Lnk/Err indicators flash at a steady rate when the link is established. The red error indicator lights if a communication error is detected.

ⓘ If the firmware in a connected GX Expander is not the same version as that in the mixer, then the mixer will automatically update the GX firmware during power up. This can take up to 20 seconds. During this time the Lnk/Err indicators on the GX Expander flash at a fast rate. Once updated normal flash rate is restored.

DX Expander connection

Connect a single DX32, or up to 2x DX168 / DX164-W / DX012 per DX port.

DX Expander inputs will appear as inputs 65-96 (DX1) and 97-128 (DX2) on the SLink port.

DX Expander outputs will appear as outputs 65-96 (DX1) and 97-128 (DX2) on the SLink port.

ⓘ DX1 and DX2 on the GX4816 cannot be used for redundancy purposes.

ME connection (SQ / Avantis only)

Connect a ME-U, ME-1 or ME-500 to the DX2 port on the GX4816. Channel names and stereo links are communicated to connected ME systems, and the ME output patch temporarily replaces the output patch to the DX2 port.

ⓘ ME connection via DX2 is not supported on dLive or AHM mixers.

Cables

Use Cat5e or higher STP cables with a maximum cable length of 100m per connection.

Allen & Heath can provide a number of Cat5e and Cat6 cables suitable for use with ACE, dSNAKE, ME, DX, GX, and gigACE connections:

Contact your local A&H dealer for more information.