JBL Tune 720 BT No Sound from Left Speaker

Ensure the volume is on:

• Confirm the volume is on by unmuting/increasing the output audio.

A weak or unstable Bluetooth connection:

• Unpair the headphones from your device and forget them from the Bluetooth list. Then, restart both the headphones and the device before re-pairing them.

Debris or Physical Blockage:

• Gently clean the left speaker grille using a soft-bristle brush, a dry cloth, or compressed air.

If nothing works, the problem may be a broken speaker:

• Remove the earcup & unscrew the screws inside with a Philips head screwdriver. Then, remove the speaker and replace it with a new speaker.