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IRT-6400-DAA: AES/EBU Distribution Amplifier

IRT-6400-DAA Home Page, PDF Brochure

The IRT-6400-DAA is a Single 1×8 or Dual 1×4 AES/EBU Digital Audio Distribution Amplifier.


  • Dual 1×4 or 1×8 outputs.
  • 75 and 110 Ohm inputs.
  • Choice of 75 or 110 Ohm outputs by changing rear connector assembly.
  • All inputs and outputs transformer coupled.
  • Digital circuit re-shapes output and restores level.
  • Selectable resampling to alternate input or local reference.
  • No cable compensation adjustments required.
  • DashBoard software monitoring and control.

IRT-6400-DAA Block Diagram

The IRT-6400-DAA is designed to provide a solution to most AES/EBU digital audio signal distribution requirements.

Whilst analogue VDA’s may be used for 75 Ohm AES signals, the digital circuitry of the IRT-6400-DAA offers the advantage of restoring the signal rise and fall times and output level without the need to manually adjust gain and compensation controls.

A choice of rear assembly is available for either 110 Ohm or 75 Ohm use. No changes are required to the main DA to convert between the two output types. The input includes both 110 Ohm and 75 Ohm input connectors and is link selectable on the main PCB.

The IRT-6400-DAA can be configured as either a single 1×8 DA or a dual independent 1×4 DA.

The IRT-6400-DAA will operate at AES sample rates from 34 to 54 kHz and may be used with non-AES digital signals that have a net zero DC content. When operating in the 1×8 mode, the alternate input can be used as a reference to which the incoming AES audio can be resampled. An internal reference can be applied to either channel to resample to 48KHz.

The IRT-6400-DAA is designed to fit the openGear standard 2RU frames which allow a mixture of cards from various manufacturers to be mounted within the same frame.

The DashBoard control software is available as a free download.

Product by:

IRT Communications IRT specialises in the design, development and manufacture of Digital and Analogue Video / Audio Broadcast and communications products including MPEG, ASI, DVB, AES/EBU, G.703, Distribution Amplifiers (DAs), HDTV and Fibre (Fiber) Optic devices used in telecommunication (ITU) and broadcast centres. Visit irtcommunications.com…