LARGE PROFESSOR同樣叫做LARGE PRO或者EXTRA P，是一個紐約的HIPHOP 唱片制作人和MC。他同時也是著名的UNDERGROUND HIPHOP組合MAIN SOURCE的成員，同時挖掘了著名的MC NAS。MAIN SOURCE從90年代初就對HIPHOP 音樂產生了很大影響。LARGE PRO與PETE ROCK， CL SMOOTH， NAS， BUSTA RHYMES和很多藝人一起合作。 Widely known initially for his work as a producer and MC with the rap group Main Source, Large Professor soon after became a full-time producer working with such acts as Big Daddy Kane and A Tribe Called Quest. Professor originally became involved in rap when he won a tryout held by Main Source members K-Cut and Sir Scratch in 1989. Contributing significantly to the creative direction of the group, Professor eventually broke with Main Source over creative differences . He then lent his hand to albums by some of raps biggest names, including Eric B. & Rakim, Nas, and Pete Rock & C.L. Smooth. For his full-length solo debut, 2002s 1st Class, Large Professor called in favors from friends including Nas, Q-Tip, and Busta Rhymes.