The rapper and his music mogul partner Jimmy Iovine have lost a case brought by Steven Lamar who claimed he was owed royalties.
The pair will have to pay ex-partner, Steven Lamar $25M.
According to the suit Lamar came to Dr Dre back in 2006 with the idea for celebrity-endorsed headphones.
The jury acknowledged that Lamar aka Andre You was initially involved with the plans but they said he was only owed one model of the popular headphones.
The jury reached a verdict, after three days of deliberations, they did not break down separate amounts to be paid by each defendant.
Beats, which added a music streaming service after its 2006 founding as a headphone company, was acquired by Apple Music in a $3bn deal in May of 2014.
The lawsuit was filed four months earlier and does not name Apple as a defendant.
