Jurassic 5 made an instant name for themselves with the release of their self-titled EP; like the Freestyle Fellowship before them (also regulars at the now-legendary Good Life Cafe), J5 were a Los-Angeles-based crew of old school hip-hop purists that sounded like they had come straight outta the schoolyard. With sparse, melodic backing tracks, the attention here is placed squarely on the four MCs, who--each with their own sound and style--come across as the hip-hop equivalent to a street-corner doo-wop group. Quality Control, the group's first proper album, is a history lesson wrapped around a tribute, stuffed with quality and innovation: DJs Nu-Mark and Cut Chemist keep things moving with tight production and great tracks--no one in hip-hop does more with music designed not to call too much attention to itself--while Chali 2Na, Akil, Marc 7 and Zaakir (Soup) weave intricate routines.