@Fharzouni
Welcome to HP Community
I have gone through your Post and would like to help
Since this is an Out OF Box Failure, I suggest you contact HP Support in your region for replacement speakers
1) Click on this link - www.hp.com/contacthp/
2) Select your product type below.
3) Enter the serial of your device.
4) Select the country from the drop-down.
5) Select the chat or get phone number options based on your preferences.
6) Fill the web-form and proceed further.
You can also contact the place of purchase if it was purchased from a Store and they will get it replaced
Thank you
If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.
KrazyToad
I Am An HP Employee