Hi @johanesbrain ,

I might be wrong, but this is a recently released speaker. Is this correct?

If so there is an 18 month limited manufacturer's warranty on the speaker.

I suggest that you verify the purchase date of the speaker and if the warranty period is still valid then consult the warranty statement (usually found in the User Guide) If you can't find the User Guide here is a link. (Scroll to the bottom of the guide to find the customer service contact information)