Wireless microphones last a long time, which means many churches, schools and clubs are still running systems bought ten or more years ago. Some are fine. Many are costing money, causing headaches — or aren't allowed to be used here any more. Here are six signs it's time to replace yours.
1. The frequency label starts with 7 or 8
Look at the sticker on the receiver or the battery compartment. If it says something between 694 and 820 MHz, the system is on a band that wireless microphones can no longer use in Australia — it was reallocated to mobile networks. Apart from the rules, these systems increasingly suffer interference from 4G traffic. There's no fix other than replacement.
Modern systems operate in the band set aside for wireless microphones below 694 MHz. TrueWave Pro's AIR-B4 tunes 606.3–693.3 MHz and the AIR-B2 650.1–693.3 MHz.
2. It has no RCM mark
The Regulatory Compliance Mark shows a product has been tested to the Australian standards that apply to it and has a local responsible supplier. Cheap imports bought online often don't have one. TrueWave Pro AIR systems are RCM and CE marked and tested to AS/NZS 4268.
3. You're still buying AA batteries
A drawer full of half-used AAs, a mic dying mid-speech, and a recurring battery bill. Rechargeable microphones fix all three. AIR handhelds and bodypacks use a removable 18650 lithium cell good for about 10 hours per charge.
4. It drops out when people move
Older budget systems often use a single antenna per channel. When the presenter turns or walks behind a pillar, the signal dips. True diversity receivers use two antennas per channel and always pick the stronger signal. Here's how true diversity works.
5. Setting frequencies is a nightmare
If changing channels means a manual, a screwdriver and a frequency chart, volunteers won't do it — and you'll live with interference. Look for IR sync (point the mic at the receiver to pair) and, for multi-mic systems, Auto Scan.
6. You can't get parts or service locally
A lost handheld shouldn't mean replacing the whole system, and a warranty claim shouldn't involve posting gear overseas. TrueWave Pro offers spare AIR-BX-H1 handhelds, bodypacks and charging docks, with a 12-month warranty supported by MSM AV in Australia.
Upgrade checklist
| Look for | Why |
|---|---|
| Operates below 694 MHz | The Australian wireless microphone band |
| RCM mark | Tested for Australia, local supplier responsible |
| True diversity | Fewer dropouts |
| Rechargeable mics | No battery costs, no mid-event failures |
| IR sync / Auto Scan | Anyone can set it up |
| Individual XLR outputs | Separate volume for each voice |
| Local warranty and spares | Fast fixes, no overseas returns |
What to do with the old system
Systems on 694–820 MHz shouldn't be sold on for use in Australia. Recycle them through an e-waste drop-off, and recycle the batteries separately.
FAQ
Will my existing mixer and speakers work with a new system?
Almost certainly — AIR receivers have standard balanced XLR outputs and a 6.35 mm mixed output.
Can I keep my old wired mics?
Yes. Wired mics aren't affected by frequency rules.
Ready to upgrade? Work out how many mics you need, then see how to buy TrueWave Pro.
