Comprising rappers Akrobatik (born Jared Bridgeman) and Mr. Lif (Jeffrey Haynes) and initially including DJ Fakts One (Jason Goler), the Perceptionists are to the Boston, Massachusetts hip-hop scene as the Justice League of America are to superheroes: the best of the best marshaling their powers for the collective good. The fiercely political Mr. Lif, whose 2002 album, Emergency Rations, was one of the first hip-hop records to overtly question the abuse of civil liberties in post-9/11 America, meshes well with Akrobatik's equally intelligent, socially conscious vibe (as seen o...