Thank you for bringing this to our attention. With sound issue, reset can help resolve the issue. Make sure that the earbuds are not connected to any Bluetooth. Press either the left or right earbud three (3) times then hold it on the third tap for 5 seconds. Once done, put back both earbuds inside the charging case for 10 seconds while the lid is closed, and connect them again to your device. Forget the JBL Endurance Peak 3 on the Bluetooth list of your source device before pairing again as reset would default all the settings of your earbuds. Our unit comes with 1 year manufacturer's warranty upon purchase. Please contact us directly for further assistance.

Thanks for your feedback. For your JBL Endurance Peak 3 to give you the best audio response, you must create a tight seal within your ear canal. To do this, angle the ear tip slightly downward to make it easier to insert into your ear canal, gently twist the earbud to fit it securely into the shape of your ear, and continue twisting the earbud into your ear canal to achieve the best seal and secure fit. If you have accomplished a tight seal, but still feel that the volume is imbalanced, please clean the contact pins on the case and earbuds using a cotton swab with alcohol. This can include sweat, grease, ear wax, etc. Please ensure the pins are dried before placing them back on the case. Also, please check if the balance control of your source device's sound settings is set to default (centered). If you need more help, please contact our customer support.