Eon 3D- Fix No Sound – Avantree Support

Before You Start: No sound may be caused by disconnected headphones, incorrect audio output settings, or a transmitter that is not receiving TV audio. Turn on your Eon 3D headphones and play music, a TV channel, or a video while testing.

Step 1 – Check the Headphone Connection

Choose how you are using your headphones.

Bluetooth – TV, Phone, Tablet or Computer

Slide the headphone mode switch to Bluetooth. The LED should flash Red & Blue (Bluetooth pairing mode).
Open your device's Bluetooth settings and connect to Eon 3D.

Solid Blue – Connected to Bluetooth.

Not flashing Red & Blue? Hold the Play/Pause button for 3 seconds to enter Bluetooth pairing mode.

Base Mode – Crescendo Transmitter

Turn on the Crescendo transmitter connected to your TV.
Slide the headphone mode switch to Base.
Keep the headphones near the transmitter.

Solid Blue – Connected to the transmitter.

Not Connected? Hold the Play/Pause button for 3 seconds to enter pairing mode.

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

Step 2 – Check the Audio & Volume

Increase the volume on the headphones and your TV, phone, or computer.
Make sure the audio is not muted.
Try another video, app, or TV channel.
Bluetooth: Select Eon 3D as your device's audio output.
Base Mode: Check that the transmitter is receiving audio from your TV.

Using a Crescendo Transmitter? If its input signal indicator is flashing white, the transmitter may not be receiving valid TV audio. Fix No Sound From TV →

Step 3 – Restart the Connection

Slide the headphone switch to OFF.
Restart your TV, phone, computer, or Crescendo transmitter.
Turn the headphones back on in Bluetooth or Base mode, reconnect, and test again.

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 →