Its a common issue with these really.
My DT990 also had this happen after about 3 years of usage, on both sides, and Beyerdynamic sent me replacement pieces after i contacted them about it, even though i was out of warranty
Its a common issue with these really.
My DT990 also had this happen after about 3 years of usage, on both sides, and Beyerdynamic sent me replacement pieces after i contacted them about it, even though i was out of warranty