RJD2 (born Ramble John "RJ" Krohn; 27 May 1976) is an American music producer and musician. RJD2 was born in Eugene, Oregon and raised in Columbus, Ohio. He currently resides in Philadelphia, Pennsylvania. He was signed to the Definitive Jux label where he released two largely instrumental hip-hop albums and has produced tracks for many prominent rappers. However, he has now left Definitive Jux and has signed with XL Recordings.