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TrueWave Pro AIR-B4 4-Channel Wireless Microphone System, Rack Mount UHF

$495.99 AUD
$495.99 AUD
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Brand: TrueWave Pro
Ships Fast from Australia: In stock
SKU: AIR-B4
TrueWave Pro AIR-B4 4-channel UHF wireless microphone system
$495.99 AUD
$495.99 AUD

Four mics.
One rack unit.
Zero dropouts.

The AIR-B4 runs four rechargeable handheld mics from one 1U True Diversity receiver — with four balanced XLR outputs, IR sync and RCM certification for Australia. Built for worship teams, panels, conferences and full-day events.

4×100Selectable channels
1U19" rackmount
100 mLine-of-sight range
~10 hPer charge
TrueWave Pro AIR-B4 1U quad-channel receiver with four rechargeable handheld wireless microphones
True Diversity8 antennas, 2 per mic
4 × 100 ChFour separate bands
1U RackmountStandard 19" rack
4 × XLR Out+ 6.35 mm mix out
Rechargeable~10 h, removable 18650
RCM certified AUBelow 694 MHz
See it work

Everything the AIR-B4 does, in 60 seconds.

Tap to explore

Meet the receiver.

Four channels, one rack unit. Tap a hotspot to see what each control and connector does.

Receiver · 1U · 480 × 240 × 50 mm · DC 12 V
True Diversity

Eight antennas listening. Every word lands.

In a real room the signal bounces off walls, people and steel. At some spots those reflections cancel out — that's where cheaper single-antenna systems crackle or drop.

  • Every mic gets its own pair of antennas — eight BNC antenna inputs in total, spread across the back of the receiver.
  • The receiver picks the stronger signal for each mic, moment to moment, so four people can move around the room at once.
  • Live RF and AF meters for all four channels so you can check every mic at a glance before the service or session starts.
Audio
Dropouts: 0

Illustration of one mic. Switch True Diversity off to see what a single-antenna receiver would do in the same room.

Channel planner

Four bands. 400 channels. Try it.

Each mic works in its own frequency band, so the four mics can't land on top of each other. Slide to choose channels and watch the receiver and mic screens update.

Mic 1
Mic 2
Mic 3
Mic 4
✓ Four mics, four bands — good to go.

Tip: check the ACMA Channel Finder for TV channels active at your address and avoid them. Running more than one wireless system in the same room? Give every mic its own frequency.

Mic gain offset

Soft speaker or loud singer? Match them.

Each AIR-B4 microphone has a gain offset from 0 to 21 dB in 3 dB steps. Give a quiet presenter a lift, or keep a powerful vocalist out of the red — before the signal ever reaches your mixer.

Illustration of how gain offset shifts the level. Set it once per mic during soundcheck.

IR Sync

Point. Press. Paired.

No menus, no frequency charts. Pick a channel, press SET, point the mic's IR window at the receiver — then repeat for the next mic. Four mics ready in about a minute.

STEP 01

Choose a channel

Use ▲ ▼ next to that mic's display to pick a clear channel.

STEP 02

Press SET

Press SET until the display shows F-----. That channel is now waiting to match.

STEP 03

Point at the nearest IR

Aim the mic's IR window at the IR window on the same side (left for mics 1–2, right for mics 3–4).

Up to 100 m · 1U rack

Rack it once. Walk the whole venue.

The receiver slides into any standard 19" rack — one unit high — alongside your mixer, amps and DSP. Up to 100 metres line-of-sight lets all four presenters roam the room.

Real-world range depends on walls, people and other RF in the room. For best results keep a clear line of sight to the antennas — in a closed rack, consider front-mounting the antennas.

Rechargeable

Charge once. Run all day.

All four mics run on removable 18650 lithium cells — about 10 hours per charge. Four magnetic charging cables are included, so every mic is ready for the next service, session or show.

~10 hRuntime per charge
18650Removable, replaceable
4 ×Magnetic USB-C cables

How many events per charge?

3
events per charge
~1 h left over

Based on ~10 hours runtime. Actual runtime varies with battery age, transmit power (1–10 mW) and temperature.

Connect

Four XLRs for the desk. One jack for the speaker.

BALANCED-A to D give every mic its own channel on a mixer or digital console. MIC OUT combines all four into one 6.35 mm output for a powered speaker or amplifier.

Made for Australia

RCM certified. Built for Australia.

The AIR-B4 is RCM certified and tested to AS/NZS 4268. All four bands sit below 694 MHz — inside the 520–694 MHz band set aside for wireless microphones in Australia.

  • Nowhere near 694–820 MHz, where wireless mics can no longer be used in Australia. Many cheap imports still ship on that band.
  • RCM and CE marked, tested to AS/NZS 4268 and EN 300 422-1.
  • 12-month warranty with local support from MSM AV in Bundoora, VIC.
Sound

Clean. Quiet. Instant.

Full-range frequency response and a wide dynamic range keep speech crisp and music natural — with latency low enough that singers and speakers never hear a delay.

20 Hz–20 kHzFrequency response

The full range of human hearing.

>120 dBDynamic range

A-weighted. Quiet when you're quiet, clean when you're loud.

<0.5%THD

Low distortion for clear, natural voices.

<2.9 msLatency

No echo-in-your-ears feeling on stage.

Everything included with the TrueWave Pro AIR-B4
What's in the box

Everything you need. Nothing to add.

  • 1× AIR-B4 quad-channel 1U UHF receiver
  • 4× Rechargeable handheld wireless microphones
  • 8× Receiver antennas (BNC)
  • 1× Receiver power adapter
  • 4× Magnetic charging cables
  • 1× 6.35 mm audio cable
  • 1× User manual
Technical specifications

The numbers.

System
System type4-channel UHF wireless, True Diversity
RF bandBelow 694 MHz (AU wireless mic band 520–694 MHz)
Channels4 × 100 selectable
Operating rangeUp to 100 m / 330 ft line-of-sight
Latency<2.9 ms
Frequency response20 Hz – 20 kHz
Audio dynamic range>120 dB, A-weighted (typical)
Total harmonic distortion<0.5%
RF sensitivity−97 dBm
Image rejection>70 dB (typical)
Operating temperature−18 °C to 50 °C (battery dependent)
CertificationRCM, CE · AS/NZS 4268, EN 300 422-1
Receiver
Format1U 19" rackmount
Outputs4 × balanced XLR + 1 × 6.35 mm mixed
Antenna connection8 × BNC
Spurious rejection>80 dB (typical)
PowerDC 12 V (adapter included)
Dimensions480 × 240 × 50 mm
Handheld microphones
BatteryRemovable 18650 rechargeable lithium
RuntimeApprox. 10 hours
Transmit power1–10 mW selectable
Gain offset0–21 dB (3 dB steps)
Occupied bandwidth<200 kHz
ChargingMagnetic charging cable (USB-C)
Dimensions250 × 52 mm
Built for

When one or two mics aren't enough.

Worship teams
Panel discussions
Conferences & seminars
Schools & universities
Community halls
Weddings & functions
Live performance
Corporate presentations
DJs & mobile entertainers
AV installations
FAQ

Good questions.

Is the AIR-B4 approved for use in Australia?

Yes. It’s RCM certified, and all four bands sit below 694 MHz, inside the 520–694 MHz band set aside for wireless microphones in Australia. Just pick channels that aren't used by local TV — the ACMA Channel Finder shows what's active at your address.

Can all four mics be used at the same time?

Yes. Each mic has its own channel, its own pair of antennas and its own XLR output, so all four work simultaneously and independently.

Will it fit in my rack?

Yes — the receiver is 1U and fits a standard 19" equipment rack. It measures 480 × 240 × 50 mm. If the rack is closed, mounting the antennas at the front gives the best range.

How do I pair a mic with the receiver?

Choose a channel with ▲ ▼, press SET until the display shows F-----, then point the mic's IR window at the IR window on the same side of the receiver. It matches automatically. Repeat for each mic.

One of our speakers is very quiet — can I boost just that mic?

Yes. Each microphone has a gain offset from 0 to 21 dB in 3 dB steps, and each channel has its own + / − volume on the receiver.

How long does the battery last, and can I replace it?

About 10 hours per charge. Each mic uses a removable 18650 lithium cell, so you can keep charged spares on hand or replace cells as they age.

Can I plug it straight into a powered speaker?

Yes. Use MIC OUT (6.35 mm, cable included) — it combines all four mics into one feed. For separate control of each mic, use the four XLR outputs into a mixer.

Two mics or four?

If you only ever need two voices, the AIR-B2 is a compact half-rack alternative with the same mics and features. Choose the AIR-B4 for worship teams, panels or anywhere three or more people speak.

Complete the setup

Round it out. We've got you.

TrueWave Pro AIR-B2 Wireless Microphone System, 2 Rechargeable UHF Mics
TrueWave Pro AIR-B2 Wireless Microphone System, 2 Rechargeable UHF MicsOnly need two mics? Same mics and features, compact receiver.$247.99
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TrueWave Pro AIR-BX Wireless Microphone Charging Dock, Handheld & BodypackDrop-in charging for two transmitters.$69.99
TrueWave Pro AIR-BX-B1 Wireless Headset & Lapel Microphone Bodypack
TrueWave Pro AIR-BX-B1 Wireless Headset & Lapel Microphone BodypackLapel + headset for hands-free speakers.$69.99
TrueWave Pro MS1750 Tripod Boom Microphone Stand
TrueWave Pro MS1750 Tripod Boom Microphone StandFull-height boom stand for stage use.$74.00

Stocked in AustraliaFast local dispatch

12-month warrantyBacked by MSM AV

Local supportBundoora, VIC · 03 9436 9000

Secure paymentAll major cards & wallets

TrueWave Pro AIR-B4 Quad-Channel UHF Wireless Microphone System

Authorised Australian TrueWave Pro dealer. MSM AV is the authorised Australian dealer for TrueWave Pro, with local stock, a 12-month warranty and support from Bundoora, VIC.
Looking for a Phenyx PTU-7000-4H or PTU-5000-4H? Those models are no longer available from us. The AIR-B4 is our current four-microphone system, with True Diversity reception, rechargeable handhelds, Auto Scan and IR sync. Compare AIR-B2 vs AIR-B4.

Professional 4-Channel Wireless Microphone System for Events, Worship & Professional Audio

Take your live audio setup to the next level with the TrueWave Pro AIR-B4 Quad-Channel UHF Wireless Microphone System — a professional wireless microphone solution designed for events, houses of worship, conferences, schools, venues, presentations and live productions.

With four independent UHF wireless microphone channels, True Diversity reception, rechargeable handheld microphones, Auto Scan frequency selection and IR synchronisation, the AIR-B4 gives you the flexibility and reliability you need when multiple speakers or performers need to be heard clearly.

The system combines professional features with simple setup, making it an excellent choice for both permanent installations and mobile event production.

🎤 Four Wireless Microphones. One Professional System.

The AIR-B4 includes four rechargeable handheld wireless microphones, allowing up to four microphones to operate simultaneously through a single 1U rackmount receiver.

Whether you're running a church service, panel discussion, conference, school event, corporate presentation or live performance, four independent channels give you the flexibility to manage multiple presenters or performers without needing multiple receivers.

📡 True Diversity UHF Reception

Wireless reliability matters when you're on stage.

The AIR-B4 uses True Diversity UHF reception to help maintain a stable wireless connection and minimise the risk of unwanted signal interruptions. With an operating range of up to 100 metres line-of-sight, the system provides plenty of freedom for presenters and performers to move around the venue.

⚡ Fast & Easy Setup

Setting up multiple wireless microphones shouldn't be complicated.

The AIR-B4 features Auto Scan to help find a suitable operating frequency, while IR synchronisation makes pairing each microphone with the receiver quick and straightforward.

Simply scan, sync and start using your microphones.

🔋 Rechargeable Wireless Microphones

Forget constantly replacing disposable batteries.

Each AIR-B4 handheld microphone uses a removable 18650 rechargeable lithium battery and provides approximately 10 hours of battery life per charge.

Magnetic charging cables are included, making it easy to keep all four microphones ready for your next event.

🎚️ Professional Audio Connections

The 1U rackmount receiver provides four individual balanced XLR outputs, giving you independent control of each microphone through your mixer, digital console, amplifier or PA system.

A 6.35 mm mixed output is also provided when you want to combine the four microphone channels into a single output.

This makes the AIR-B4 suitable for everything from compact PA systems to professional installed audio systems.

🏢 Built for Professional Installations

The AIR-B4's 1U rackmount receiver is designed to integrate neatly into standard 19-inch equipment racks.

It is an ideal wireless microphone solution for:

  • Houses of worship and churches

  • Conference rooms and meeting spaces

  • Corporate presentations

  • Schools and universities

  • Community halls

  • Event venues

  • Live performances

  • Panel discussions

  • Wedding and function venues

  • Professional AV installations

  • DJs and mobile entertainers

🇦🇺 RCM Certified for Australia

The AIR-B4 is RCM certified and CE marked, tested to AS/NZS 4268 and EN 300 422-1. It operates between 606.3 and 693.3 MHz, inside the 520–694 MHz band the ACMA sets aside for wireless microphones in Australia.

Television broadcasting shares this band, so channels need to be clear at your location. Auto Scan finds them for you.

Wireless microphones can no longer be used between 694 and 820 MHz in Australia. Many imported systems still ship on that band — the AIR-B4 does not go near it.

Backed by a 12-month warranty with local Australian support.

Why Choose the TrueWave Pro AIR-B4?

RCM Certified
Tested to Australian standards, operating in the Australian wireless microphone band.

4 Independent UHF Channels
Run four wireless handheld microphones from one receiver.

True Diversity Reception
Designed for stable wireless performance and reduced signal dropouts.

100 Selectable Channels Per Microphone
With 4 × 100 selectable channels, you have greater flexibility when managing wireless frequencies.

Up to 100 m Wireless Range
Enjoy freedom of movement with up to 100 metres line-of-sight operating range.

Rechargeable Handheld Microphones
Approximately 10 hours of operation per charge with removable rechargeable batteries.

Auto Scan + IR Sync
Find a suitable frequency and synchronise microphones quickly.

1U Rackmount Receiver
A professional rackmount design for installed AV systems and mobile production racks.

Individual Balanced XLR Outputs
Connect each microphone independently to your mixer or sound system for greater control.

Low Latency Audio
With latency below 2.9 ms, the system is designed for responsive live performance and presentation use.

Complete Wireless Microphone Solution

The TrueWave Pro AIR-B4 is more than just a set of wireless microphones. It is a complete four-channel professional UHF wireless microphone system designed to make multi-microphone setups easier, cleaner and more reliable.

If you regularly need more than two microphones, the AIR-B4 is an ideal step up from a dual-channel system — giving you four independent channels in a professional 1U rackmount format.

Technical Specifications

Specification AIR-B4
System Type 4-Channel UHF Wireless Microphone System
Channels 4 × 100 Selectable Channels
Reception True Diversity
RF Frequency 606.3 – 693.3 MHz
Frequency Response 20 Hz – 20 kHz
Audio Dynamic Range >120 dB
Total Harmonic Distortion <0.5%
Latency <2.9 ms
Operating Range Up to 100 m / 330 ft line-of-sight
Receiver Outputs 4 × Balanced XLR + 1 × 6.35 mm Mixed
Receiver Format 1U Rackmount
Microphone Battery Removable 18650 Rechargeable Lithium
Battery Life Approx. 10 hours
Transmission Power 1–10 mW selectable
Antenna Connection BNC
Receiver Power DC 12V
Certification RCM, CE

What's Included

  • 1 × TrueWave Pro AIR-B4 Quad-Channel UHF Receiver

  • 4 × Rechargeable Handheld Wireless Microphones

  • 8 × Receiver Antennas

  • 1 × Receiver Power Adapter

  • 4 × Magnetic Charging Cables

  • 1 × 6.35 mm Audio Cable

  • 1 × User Manual

The TrueWave Pro AIR-B4 is supplied by MSM AV in Australia, giving you access to a professional wireless microphone system backed by an Australian AV specialist.

Whether you need wireless microphones for a church, conference, school, corporate event, live venue or professional AV installation, the AIR-B4 delivers the four-channel flexibility, rechargeable convenience and professional connectivity required for demanding applications.

Australian Stock | Fast Local Dispatch

Buy with confidence knowing your TrueWave Pro wireless microphone system is stocked in Australia and ready for local dispatch.

Need help choosing the right wireless microphone system? Contact the MSM AV team and we'll help you select the right solution for your application.

Frequently Asked Questions

What's the difference between the AIR-B2 and AIR-B4?

The AIR-B4 doubles the channel count to 4, in a 1U rackmount receiver rather than a desktop unit, for larger productions needing more simultaneous microphones.

What's the wireless range?

Up to 100m (approx. 330ft) line-of-sight, the same as the AIR-B2.

How long do the microphones run on a charge?

Approximately 10 hours per charge from the removable 18650 lithium battery.

Can it be rack-mounted?

Yes, it's built as a 1U rackmount receiver, ready to slot into a standard 19 inch rack.