Main Source was a Canadian-American East Coast hip hop group based in New York City/Toronto,[1] 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.

However, Sir Scratch and K-Cut released a second album under the Main Source name titled Fuck What You Think,[4] with new recruit Michael Deering aka Mikey D on vocals & featured another first on-record appearance for The Dog Pack which would later become the Yonkers rap group The LOX on "Set It Off"; however, the album was shelved due to inner conflicts between Wild Pitch Records and group management.,[4] The singer Madonna sampled the bassline from "What You Need" on Fuck What You Think in her song "Human Nature," which appeared on her 1994 album, Bedtime Stories.

& Rakim, Pete Rock & CL Smooth, Nas, and Diamond D. He references his falling-out with Sir Scratch and K-Cut on A Tribe Called Quest's third album Midnight Marauders.

On the track "Keep It Rollin'" he says, "I'm Uptown chillin', takin in this Grandmaster Vic blend/from the projects, the PJ's, fuck them two DJ's; Self mission."

K-Cut also produced for a wide range of hip hop artists including Big Pun, Maestro Fresh-Wes, Fu-Schnickens, Queen Latifah, and even NBA star Shaquille O'Neal.