Airsync Wireless XLR Transmitter & Receiver Manual (Gen 2)

Quick Start Guide

1. Before powering on, set the transmitter to Mic or Line mode.
    • Use Mic for microphones. Use Line for sending audio from a mixer to speakers.

2. Voltage/phantom power: for dynamic/ribbon mics use Normal. For condenser mics use 48V. Do not use 48V with ribbon microphones.

3. Connect: plug the transmitter to the mic/line source and the receiver to your mixer or powered speaker. To avoid clipping, connect devices before powering on.

4. Power on/off: press and hold the power button for 2 seconds on each unit.

5. Frequency: double-click the transmitter’s power button to change frequency; the receiver follows automatically. (Factory paired.)

6. Charge: use the included USB-C cables for both units.

Locking/Unlocking Frequencies

Overview

When AirSync devices are unlocked, receivers automatically sync to the first available transmitter they detect. Use the lock function to create dedicated transmitter-receiver pairs and prevent interference when operating multiple units simultaneously.

Lock Process

Prerequisites: Turn off all other AirSync devices before starting.

  1. Prepare Transmitter:
    • Press and hold the power button on your chosen transmitter
    • Wait for the frequency display to go blank and start flashing
    • Press the power button once to enter Lock mode
  2. Lock Receiver(s):
    • Press and hold the power button on each receiver you want to pair
    • Hold until the screen displays "LOCK"
    • Repeat for additional receivers as needed
  3. Complete Lock:
    • Press the power button on the transmitter once to return to active status
    • Units are now locked together and isolated from other AirSync devices.
    • They cannot be synced to other transmitters until unlocked.

Unlock Process

  1. Prepare Transmitter:
    • Press and hold the power button on the locked transmitter
    • Wait for the frequency display to go blank and start flashing
    • Press the power button twice to enter Unlock mode
  2. Unlock Receiver(s):
    • Press and hold the power button on each locked receiver
    • Hold until the screen displays "UNLOCK"
    • Repeat for all previously locked receivers
  3. Complete Unlock:
    • Press the power button on the transmitter once to return to active status
    • Receivers will now automatically sync to the first available transmitter

Note: Multiple receivers can be synced to a single transmitter when locked together, but multiple transmitters cannot lock to a single receiver.

Transmitter and Receiver Functions

AirSync XLR Transmitter and Receiver functions overview with labeled indicators

Frequently Asked Questions

How do I set Mic vs Line mode? (What’s the difference?) ›

Mic mode is for microphones. It expects a very low-level signal and applies the correct gain so your mic sounds clean and undistorted.

  • Use Mic mode when: plugging the transmitter directly into a handheld, headset, lavalier, or any XLR microphone.
  • Symptoms of wrong mode: If you accidentally use Line mode with a mic, your signal may be weak, noisy, or thin.

Line mode is for gear that already outputs a strong line-level signal, like a mixer or audio interface, and for sending that signal wirelessly to a powered speaker or mixer input.

  • Use Line mode when: transmitting audio from a mixer/console/interface to speakers or to another device expecting line level.
  • Symptoms of wrong mode: If you use Mic mode with a line source, you may get distortion or clipping.

Tip: Set the mode before powering on. If something sounds off (quiet/noisy or distorted), double-check you’re in the correct mode.

I'm hearing pop sounds through my PA system. Is this normal? ›
This can happen when the selected frequency is crowded in your area. Try different frequencies (and leave each one on for a few minutes) to find the most stable. Local conditions and other wireless devices can affect results.
What's the frequency range of AirSync? ›
AirSync operates on 657.000–663.000 MHz.
I'm getting hiss, hum, or noise. How do I fix this? ›
Check the basics:
• Mic/Line Mode: use Mic for microphones; Line for mixers/line sources.
• Voltage: Normal for dynamic/ribbon mics; 48V for condenser mics.
• Frequency: try a different frequency if your environment is noisy.
My audio sounds distorted or low-quality. ›
Ensure the correct Mic vs Line mode and voltage setting are selected. Using Mic mode on a line source can clip, and using Line on a mic can sound thin/noisy. For condensers, enable 48V; do not use 48V with ribbon mics.
Will multiple AirSync units fit side by side on my mixer? ›
Yes. The slim body and aligned XLR connector let units sit shoulder-to-shoulder on most mixers with adjacent XLR inputs, saving space on crowded boards. If your mixer has unusually tight spacing or recessed jacks, a right-angle XLR adapter can help with clearance while preserving access to neighboring channels.
Can it be used while charging? ›
Yes. You can operate the system while charging via USB-C. Use a quality 5V USB power source, avoid noisy adapters, and keep the units dry during operation.
My units won't pair or stay connected. ›
Make sure both are on the same frequency. Double-click the transmitter’s power button to change frequency — the receiver should follow automatically. If using multiple sets, lock each pair so every receiver stays with its own transmitter.
How do I reset my AirSync? ›
Power off both units, wait a few seconds, then power them back on. Set your preferred frequency again.
Need human help? ›
Visit our support page or email support@codamusictech.com.