Before You Start: No sound usually means the headphones are not connected to the transmitter, or the transmitter is not receiving audio from the TV. This can happen because of incorrect TV audio settings, a loose cable, or low volume. Follow the steps below to find and fix the issue.
Step 1 – Check the Headphone Connection
Turn on the NB16-Q headphones and Audikast-3 transmitter. Check the Bluetooth indicator on both devices.
Headphones Not Connected? Follow the pairing and locking guide to reconnect them.
How to Pair & Lock Headphones →Step 2 – Check the TV Audio Signal & Settings
Play TV audio and check the transmitter's OPT / AUX audio signal indicator.
Why PCM? For Optical connections, set the TV audio format to PCM / Stereo. Dolby, DTS, or Bitstream may cause no sound.
Choose your TV connection type and check the matching settings.
Step 3 – Check Connections, Volume & Restart
- Check that the audio cable is securely connected to the TV and transmitter. Use only one cable (Optical or AUX).
- Increase the headphone volume (+). For AUX, increase TV volume. For Optical, try increasing the transmitter volume.
- Make sure the TV is not muted. Try another channel, video, or app.
- Try a NEW audio cable of the same type.
- Still no sound? Restart the transmitter and headphones, then test again.
No Sound on Certain Apps or Cable Boxes? Set the TV or streaming device's digital audio format to PCM / Stereo.
Cable Box Audio Settings →Still No Sound?
Tell us your TV model, connection type (Optical or AUX), transmitter OPT/AUX indicator status, and headphone LED color.
Contact Avantree Support →
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