Low volume right headphone Zolo Liberty

Five months ago I’ve been given Zolo Liberty headphones.
A few days ago the right headphone started to work bad: the volume is definitely lower than the left one.
I reset both of the headphones, I cleared them, I switch them off and on lots of times, but it didn’t work

Is there another way to solve the problem? Do I have to return them…?

Thank you for your answers.

Hi @margheritaboffi,
Please reach out to service@zoloaudio.com for help with this issue.
You could also try out these great instructions from @elmo41683 !
Zolo liberty volume fix!