Before You Start: No sound may be caused by disconnected headphones, incorrect TV audio settings, or a faulty audio cable. Turn on the Quartet 2 Flex Base and headphones, then play a TV program or video with sound.
Step 1 – Check the Headphone Connection
Flashing Blue? Reconnect the headphones using the guide below.
Pair / Reconnect Headphones →Step 2 – Check the Audio Signal & Settings
If using Optical or AUX, play TV audio and check the OPT / AUX light on the Flex Base.
Choose your connection type and follow the matching instructions.
Note: Quartet 2 headphones connect to the Flex Base, not directly to the TV or phone.
Step 3 – Check Connections, Volume & Restart
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Check the cable connection:
Optical Cable
Ensure the optical cable is securely connected to the transmitter's OPTICAL INPUT FROM TV port.
AUX Cable
Ensure the AUX cable is securely connected to the transmitter's AUX INPUT FROM TV port.
- Check the Flex Base input: Select OPT/AUX when using an Optical or AUX cable.
- Increase the volume on the headphones and Flex Base.
- If using Optical or AUX, try a new audio cable of the same type.
- Still no sound? Restart the Flex Base, headphones, and TV, then test again.
No sound on certain apps or cable boxes? Set the TV or streaming device's audio format to PCM / Stereo.
Cable Box Audio Settings →Still No Sound?
Tell us your connection type and the headphone and Flex Base LED status.
Contact Avantree Support →
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