Featuring four rappers and two DJs, this engaging collective emerged from L.A.’s alternative hip hop scene. Their second album is a rich banquet of spacious, old-school grooves and witty rhymes. The edgy “One of Them” attacks the crassness of selÞsh superstars, while “What’s Golden” uses a Public Enemy sample to create heavy dance-floor funk. Diva Nelly Furtado guests on “Thin Line,” while the venerable Big Daddy Kane captures the thrill of rhyming to a breakneck beat on “A Day at the Races.” From the ’70s vibe of “Hey” to the spirited turntable collage “Acetate Prophets,” Power in Numbers makes you feel good without feeling dumb.