Voices of Theory was an R&B group from Philadelphia, Pennsylvania.

Voices of Theory came to be when five Latino North Philadelphians - joined up in 1993 to form a Hip-Hop - R&B group and became known as the Latin version of their strongest musical influence, Boyz II Men. Originally known simply as "Theory," their first major tour was in 1993, when they opened for Mariah Carey for 12 nights of her 1993 tour in North America. Later that year, they signed on to record "Why Do Fools Fall in Love," the theme song of the film Calendar Girl.

Their success came to a screeching halt when their coach, manager and long-time friend, Melvin Wallace, was murdered in 1995. In 1997, upon finding a new management in producer Jellybean Benitez's HOLA Recordings, they returned to recording. The following year, they released their eponymous debut album. They received considerable airplay and record sales with the release of their single "Say It," a romantic serenade that reached #10 on the U.S. Billboard charts. Their follow-up single "Wherever You Go" was the quintet's last known major release.

Members:
Mechi Cebollero
James Cartagena
Hector Ramos
David Cordova
Mike Galvis