Main Source was a Canadian-American East Coast hip hop group based in New York City/Toronto, composed of Toronto-born DJs and producers, K-Cut and Sir Scratch, as well as the New York City natives, DJ J.O.D and record producer Large Professor. Later, another Queens MC, Mikey D (Michael Deering), replaced Large Professor.
Main Source was founded in 1989. The group's first album, Breaking Atoms, released in July 1991, featured tracks such as "Looking at the Front Door", "Just a... meer