Before You Start: No sound may mean Ambient Mode is on, the earbuds are disconnected from the transmitter, the TV is not sending a compatible audio signal, or a cable is loose. Follow these steps to check.
Step 1 – Turn Off Ambient Mode
Check the receiver’s LED. If it is solid red, Ambient Mode is on. Press the Ambient button to return to regular TV listening mode.
Ambient Mode amplifies sounds around you. It is not the regular TV listening mode.
Step 2 – Check the Earbud Connection
Turn on the HT381 transmitter and earbuds. Check the receiver’s LED.
Step 3 – Check the TV Audio Settings
Choose your TV connection type and check the matching settings.
Why PCM? For Optical connections, the transmitter needs a compatible stereo signal. Set the TV audio format to PCM / Stereo. Dolby, DTS, or Bitstream may cause no sound.
Step 4 – Check Cable Connections, Volume & Restart
1. Check the cable connection:
Make sure the cable is securely connected from the TV to the transmitter.
- Increase the earbud volume. Tap the right earbud to raise the volume. For AUX, also increase the TV volume.
- Make sure the TV is not muted. Try another channel, video, or app.
- If there is still no sound, try a new cable of the same type.
- Turn off the transmitter and both earbuds. Reconnect the audio cable, then turn them back on and 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 brand and model, connection type (Optical or AUX), and whether the receiver LED is solid green.
Contact Avantree Support →
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