UHF Wireless Microphone Frequency Guide


Australia UHF Wireless Microphone Frequency Guide

1. Legal UHF Frequency Ranges (ACMA-Approved)

As of the latest Australian Communications and Media Authority (ACMA) guidelines, these are the key UHF frequency bands available for wireless microphones in Australia:

Frequency Range Notes
520–525 MHz Shared use; low interference, limited space.
526–535.5 MHz Regulated broadcast services exist; some shared access.
536–542 MHz Recommended for wireless mic use in most areas.
542–548 MHz Available in some locations; check local spectrum use.
174–230 MHz (VHF Band) Still legal but more prone to interference and limitations.
653–663 MHz Licensed use only under the Low Interference Potential Devices (LIPD) Class Licence. Often used by event professionals.

Illegal/Unavailable Frequency Ranges

Avoid using the following ranges:

  • 694–820 MHz: No longer legal for wireless mics since January 1, 2015. This spectrum is now used for mobile broadband (4G/5G).
  • 820 MHz and above: Not allocated for wireless audio devices.

2. License-Free (Class License) Use

Under the LIPD Class Licence, you can operate without an individual license in these conditions:

  • Power output must be under 100 mW ERP (Effective Radiated Power).
  • Device must comply with ACMA technical standards.
  • You’re using approved frequency ranges, such as 520–525 MHz or 536–542 MHz.

3. Licensed Operation (Higher Power or Special Bands)

You need a license if:

  • You’re operating in 653–663 MHz.
  • Your system exceeds 100 mW ERP.
  • You’re coordinating multiple high-power units (e.g., for large events or broadcast).

Apply through ACMA or check with a frequency coordinator.

4. How to Choose the Right Frequency

  • For schools, churches, venues, and DJs: Use the 536–542 MHz band for safe, license-free operation.
  • For large productions: Coordinate through a licensed provider or hire frequency-checked systems.
  • Avoid frequencies near TV channels or 4G towers—check with the ACMA TV Frequency Viewer for your local area.

5. Best Practices

  • Use UHF digital or diversity systems to avoid dropout.
  • Scan for clear frequencies before each use.
  • Stick to frequency-agile systems that allow tuning within legal bands.
  • Label and monitor frequencies if you use multiple wireless systems.

6. Brands Offering Australia-Compliant Wireless Mics

These brands typically offer models specifically tuned to legal AU ranges:

  • Shure (BLX, SLX, QLX-D)
  • Sennheiser (EW-D, XSW)
  • Rode Wireless Series
  • AKG, Audio-Technica, Line 6 – with AU-tuned versions

Quick Reference: Safe Frequency Zones (2024 Snapshot)

Band Range (MHz) License Required
VHF 174–230 No
UHF 520–525 No
UHF 536–542 No (recommended)
UHF 653–663 Yes
>694 Illegal N/A