The ACMA's channel finder | ACMA

The ACMA's channel finder

From 1 January 2015, wireless microphones must not be used in the 694 – 820 MHz frequency range. The main alternative frequency ranges will be 520 – 694 MHz and 1790 – 1800 MHz, with some other frequencies also available.

If you choose to use the spectrum in the 520 – 694 MHz range, you must not cause interference to television and radio services who also use this spectrum.

Our regional fact sheets have high-level information about the changes to wireless microphones.

The ACMA’s wireless microphone channel finder

Find out what spectrum is available in 520 – 694 MHz for wireless microphones in your area by using our online channel finder.

Simply type the street address of where you intend to use your wireless microphone into the channel finder and it will tell you what spectrum is available in your area.

Channel finder


The fine print

The online channel finder identifies spectrum that is considered available for wireless microphone users from 1 January 2015. This tool estimates spectrum availability for wireless microphones based on television coverage information from the Department of Communications’ mySwitch website.  

While the channel finder provides a good indication of spectrum availability for wireless microphones, it has its limitations. We recommend that you speak to your supplier about possible additional options that might be identified through a site audit or local knowledge, especially in areas that have a high density of television services (particularly metropolitan areas).

Suppliers’ frequency finder tools

Some wireless microphone suppliers have developed frequency finder tools that can help you determine what spectrum is available in your area:

  • AKG's Frequency Check
  • Jands and Shure’s Ready for digital
  • Syntech and Sennheiser’s DDReady

While the frequency finder tools use data that has been provided by the ACMA under the Creative Commons Licence, the ACMA has not endorsed the products provided by these parties.

If you know of another frequency finder tool that should be listed here, please contact us at

Last updated: 24 January 2014