Quartet - Fix No Sound – Avantree Support

Before You Start: No sound is usually caused by disconnected headphones, the wrong audio input, or incorrect TV sound settings. Turn on the Quartet transmitter and headphones, play a TV channel or video with sound, then follow the steps below.

Step 1 – Check the Headphone Connection

Check the connection indicators on the transmitter and headphones.

Transmitter Status Indicator

Solid White – Headphones connected.

Flashing White – Transmitter in pairing mode.

Headphone Indicator

Solid Blue – Connected.

Flashing Blue – Headphones in pairing mode.

Not connected? The original Quartet headphones are pre-paired. If one is disconnected, follow the pairing guide below.

Quartet – Pair / Add Headphones →

Step 2 – Check the TV Audio Cable

Make sure the audio cable is firmly connected at both ends.
Connect the TV's audio OUT to the Quartet transmitter's OPT IN or AUX IN, not its audio output ports.
Press the transmitter's AUX/OPT button to select the connection you are using.

Tip: The corresponding AUX or OPT indicator should light up.

Step 3 – Check TV Audio Settings

Open the connection you are using:

Optical Cable

Connect TV Optical OUT to Quartet OPT IN.
Set TV Sound Output to Optical / Digital Audio Out.
Set Digital Audio Format to PCM / Stereo.
Press AUX/OPT on the transmitter until the OPT indicator lights up.

Find PCM Settings for Your TV →

AUX / 3.5 mm

Connect TV Headphone / Audio OUT to Quartet AUX IN.
Set TV Sound Output to Headphones Out, if available.
Increase the TV volume.
Press AUX/OPT until the AUX indicator lights up.

Red / White RCA

Connect the TV's red and white Audio OUT ports to Quartet AUX IN using an RCA-to-3.5 mm cable.
Make sure the TV ports are labeled OUT, not IN.
Press AUX/OPT until the AUX indicator lights up.

Step 4 – Check the TV Audio Input

While the TV is playing, check the transmitter's AUX / OPT indicator.

AUX / OPT Solid White – TV audio detected.

AUX / OPT Flashing White – Check that the correct input is selected and the audio cable is connected. If using Optical, set the TV Sound Output to Optical / Digital Audio Out and the audio format to PCM / Stereo.

Step 5 – Check Volume and Mute

Press Volume + on the headphones.
Press the headphone Play/Pause button once to unmute if muted.
Increase the transmitter volume using its + button.
Try another TV channel or video.

No Sound on Netflix, Prime Video or Cable Box?

If regular TV audio works, start playing the affected program, then set the TV or streaming device's digital audio format to PCM / Stereo.

Cable Box Audio Settings →

Still No Sound? Restart

Turn off the transmitter and headphones.
Reconnect the TV audio cable firmly.
Turn on the transmitter, then the headphones.
Check that the transmitter Status light is solid white and the headphone light is solid blue.
Select the correct AUX / OPT input and test again.

Still No Sound?

Tell us your TV model, cable type, selected AUX/OPT input, and the transmitter/headphone LED status.

Contact Avantree Support →