Prolink - Fix No Sound – Avantree Support

No sound from your ProLink may be caused by an incorrect USB audio output, a lost connection between the DG60L transmitter and AS70P receiver, or low volume. Follow the 3 steps below to restore sound.

Check the USB Audio Output

The ProLink system uses a DG60L USB transmitter to send audio wirelessly to the AS70P receiver.

Plug the DG60L transmitter securely into a powered USB port on your computer or compatible audio source.
Play music or a video.
Open your device's Sound / Audio Output settings.
Select the DG60L USB audio device as your sound output.
Make sure the device is not muted and increase the output volume.

I'm Using ProLink with Windows

Open Settings → System → Sound.
Under Output, select the DG60L USB audio device.
Confirm that the output is not muted.
Increase the volume and test audio.

Tip: If the DG60L does not appear, unplug it and reconnect it directly to another powered USB port.

I'm Using ProLink with Mac

Open System Settings → Sound.
Under Output, select the DG60L USB audio device.
Start audio playback.
Increase the output volume if the control is available.

DG60L Is Not Detected by My Device

Remove the DG60L from the USB port.
Reconnect it directly to the device, avoiding a USB hub while testing.
Try another compatible USB port.
Restart your computer or audio source.
Open the sound output settings again and check for the USB audio device.

Important: A powered USB port does not necessarily mean the connected device supports USB audio output. Check compatibility with your audio source.

Expected: The DG60L is recognized as an audio output device and audio is playing.

Check the DG60L and AS70P Connection

The DG60L transmitter and AS70P receiver are paired at the factory. Normally, they reconnect automatically when both devices are powered on.

Keep the DG60L plugged into your audio source.
Slide the AS70P receiver's power switch to the ON position.
Keep the receiver close to the transmitter.
Allow the devices a few seconds to reconnect.
Check whether you can hear audio through the wired earphones.

Connected

The receiver indicates a successful connection. Continue to Step 3.

Alternating Red & Blue

The device is in Bluetooth pairing mode. Reconnection is needed.

AS70P Won't Reconnect to the DG60L

Disconnect the DG60L from USB.
Turn off the AS70P receiver.
Plug the DG60L back into the USB port.
Turn on the AS70P receiver.
Keep both devices close together and allow them to reconnect.

Tip: If you previously paired the AS70P with a phone or another Bluetooth transmitter, disconnect that device before trying ProLink again.

ProLink Interactive Setup Guide →

AS70P Is Connecting to My Phone Instead

The AS70P can also work independently as a Bluetooth receiver. If it connects to your phone, it may not receive audio from the DG60L.

Open your phone's Bluetooth settings.
Disconnect Avantree AS70P.
Temporarily turn off Bluetooth on the phone.
Restart the AS70P receiver.
Allow it to reconnect to the DG60L.

Using AS70P with Other Bluetooth Devices →

Check the Earphones, Volume, and Listening Mode

Plug your wired earphones or headphones securely into the AS70P receiver's 3.5 mm headphone jack.
Increase the AS70P receiver's volume using its Volume + button.
Increase the volume on your computer or audio source.
Check the Music / Gaming switch on the DG60L transmitter.
Play music or a video again.

Music Mode

Designed for higher-quality music and general audio listening.

Gaming Mode

Designed for lower-latency listening, helping reduce the delay between on-screen action and sound.

Note: The Music / Gaming switch changes the listening mode. It does not replace selecting the correct USB audio output or establishing the wireless connection.

Expected: The DG60L is selected as the audio output, the AS70P is connected, and sound plays through your wired earphones.

Still No Sound? Test the Wired Earphones

Remove the earphones from the AS70P.
Reconnect them fully to the headphone jack.
If available, try another pair of compatible wired earphones.
Increase the receiver volume gradually.
Test with continuous music or speech.

Diagnostic tip: If another pair of earphones works, the issue may involve the original earphones or their cable.

Still Not Connecting? Reset the ProLink Devices

If restarting the devices does not help, you can clear their saved Bluetooth connections and set them up again.

Reset the DG60L transmitter

Plug the DG60L into a powered USB port.
Hold the Multi-Function Button for 2 seconds until the red and blue LEDs illuminate together.
Double-click the same button.
The LED appears pink for approximately 2 seconds, confirming the reset.
The LED then flashes red and blue alternately, indicating pairing mode.

Reset the AS70P receiver

Turn on the AS70P.
Press and hold Volume + and Volume − together for 5 seconds.
The LED appears pink for approximately 2 seconds.
The receiver then enters pairing mode, with its LED flashing red and blue alternately.

Important: Resetting clears saved Bluetooth pairings. Follow the setup guide afterward to reconnect the DG60L and AS70P.

Complete ProLink Factory Reset Guide →

Reconnect ProLink After Reset →

Sound Plays but Keeps Cutting Out or Stuttering

If audio plays intermittently rather than being completely silent, follow the dedicated audio glitch troubleshooting guide.

Test the DG60L and AS70P close together.
Try another USB port.
Check whether the issue happens in both Music and Gaming modes.
Follow the official DG60L firmware update guide if the issue persists.

Firmware note: The official DG60L V1.9 firmware update is intended to address audio glitches and playback stuttering. It requires a Windows PC and should not be used as the first troubleshooting step for a complete no-sound issue.

Fix Audio Glitches and Stuttering →

Still Need Help?

Tell us whether the issue involves the DG60L transmitter, AS70P receiver, or both. Include your computer or audio source, the LED behavior on each device, and whether you can hear any sound through the wired earphones.

ASK A QUESTION