Main Source is a studio album by hip hop artist Large Professor.

It is produced by Large Professor who provides the song with a mellow beat and a deep bassline.

Nas raps two verses on the song and contributes to the call and response chorus with Large Professor.

In 2002, Large Professor regained the rights to the recordings and released the album as a promo-only CD.

Acclaimed producer Large Professor produced a large amount of the album's tracks, but wasn't credited on the album.

At 15, he met producer Large Professor from Flushing, and was introduced to his group Main Source.

Paul's protégé Large Professor completed his work.

On March 17, 2013, the music video for "Built Pyramids" featuring Large Professor was released.

Large Professor, one of the group's founding members, left the group before the making of this album.

His protégé Large Professor took over production duties on much of the music Paul was working on before his death.