Eon 3D- Fix No Sounds – Avantree Support

NO SOUND TROUBLESHOOTING

Eon 3D – No Sound From Headphones?

Follow these steps if your Eon 3D (AS100-3D) headphones are connected but you cannot hear sound.

Before You Start: Turn on your headphones and play music, a TV channel, or a video while testing.

Step 1 – Check Your Connection Mode

Choose how you are using your headphones:

Using Bluetooth (TV, Phone, Tablet or Computer)

Slide the headphone mode switch to Bluetooth.
Open the Bluetooth settings on your TV, phone, tablet or computer.
Check that Eon 3D is connected.
Select Eon 3D as the audio output device, if required.
Play audio and check whether you can hear sound.

Check the Headphone LED

Solid Blue – Bluetooth connected.

Flashing Red & Blue – Bluetooth pairing mode.

If the LED is not flashing red and blue, hold the Play/Pause button for 3 seconds to enter pairing mode. Then select Eon 3D from your device's Bluetooth list.

Using Base Mode (Crescendo Transmitter)

Make sure your compatible Crescendo transmitter is powered on and connected to your TV's audio output.
Slide the headphone mode switch to Base.
Keep the headphones close to the transmitter.
Check whether the headphone LED is solid blue.

Solid Blue – Connected to the transmitter.

If the headphones do not connect, hold the Play/Pause button for 3 seconds to enter pairing mode.

Need a Compatible TV Transmitter?

The Avantree Crescendo Base is a compatible transmitter for Eon 3D headphones.

View Crescendo Base Transmitter →

Important: The included Eon 3D charging stand does not transmit TV audio. Base mode requires a compatible Crescendo transmitter.

Step 2 – Check the Volume

Press Volume + on the headphones.
Increase the volume on your TV, phone, computer or other audio source.
Make sure the audio source is not muted.

Step 3 – Restart the Connection

Slide the headphone switch to OFF.
Restart your TV, phone, computer or Crescendo transmitter.
Switch the headphones back to Bluetooth or Base, whichever you are using.
Reconnect and test the sound again.

Step 4 – Connected but Still No Sound?

Try another app, video or TV channel.

Using Bluetooth Mode

Solid Blue on Headphones: Connected.

If there is no sound, select Eon 3D as the audio output on your TV, phone or computer.

Using Base Mode (Transmitter)

Solid Blue on Transmitter & Headphones: Connected.

Flashing White Input Signal: No valid audio from TV.

If there is still no sound, follow this TV audio troubleshooting guide:

Fix No Sound After Setup →

Still No Sound?

Tell us your TV or device model, whether you are using Bluetooth or Base mode, and what the headphone and transmitter LEDs show.

Contact Avantree Support →