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 a member of groups such as Soul Position, MHz Legacy, and Icebird. According to Wired, his stage name derives from "a Star Wars droid," R2-D2.
Born in Eugene, Oregon, Krohn was raised in Columbus, Ohio. He began making music in 1993.
In 2002, RJD2 signed to El-P's record label Definitive Jux and released his solo debut album, Deadringer, to much acclaim. RJD2 later collaborated with rapper Blueprint under the name Soul Position, releasing 8 Million Stories on Rhymesayers Entertainment in 2003.
He released his second solo album, Since We Last Spoke, on Definitive Jux in 2004. Soul Position's second album, Things Go Better with RJ and AL, was released in 2006 under Rhymesayers Entertainment. 2006 also saw the release of Magnificent City, his collaborative album with rapper Aceyalone. Magnificent City includes "A Beautiful Mine", which has been used in the titles of Mad Men.
In 2007, RJD2 released the solo album, The Third Hand, on XL Recordings. In 2010, he released his fourth solo album, The Colossus, on his own label RJ's Electrical Connections. In 2011, he released the album, We Are the Doorways, under the pseudonym The Insane Warrior.
RJD2 formed Icebird with Aaron Livingston, vocalist of a Philadelphia-based band called The Mean. The duo's debut album, The Abandoned Lullaby, was released in 2011. In 2013, RJD2 released his fifth solo album, More Is Than Isn't, on RJ's Electrical Connections.
In 2015, RJD2 released a collaborative album with rapper STS, titled STS x RJD2. His sixth solo album, Dame Fortune, was released in 2016.