From hiphopdx.com, After Tweeting about how Dr. Dre and Jimmy Iovine were angry about 50's decision to come out with his own line of headphones that would directly compete with Beats by Dre, 50 is now saying that after speaking with Jimmy Iovine they are on good terms.
On the other hand, TMZ spoke with Dr. Dre about the matter and he did not appear to be please and stated he "never heard of his headphones".