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Def Jam celebrated the big 3-0 with a star-studded mega concert last week at Brooklyn's Barclays Center, but now we're getting a glimpse into the beginning of it all with Rick Rubin. Rolling Stone captured the Def Jam Founder going back to where it all began: his NYU dorm room. 

[RELATED: Def Jam Celebrates 30th Anniversary With Massive Concert]

In the mini-documentary, Rick goes into detail about how his dorm was set up with speakers, equipment, and albums everywhere. He also reveals how he learned to make records, how he met Russell Simmons, and ultimately how Def Jam was born. 

Check it out below! *Warning: Some explicit language