RJD2 Biography (Wikipedia)
Ramble Jon Krohn (born May 27, 1976), better known by his stage name RJD2, is an American musician based in Columbus, Ohio. He is owner of record label RJ's Electrical Connections. He has been member of groups such as Soul Position, MHz Legacy, and Icebird. He is known as the musician behind "A Beautiful Mine", the titular song of the television show Mad Men.