The Ghetto Blaster EP

The second release by this rock-rap supergroup — Rage Against the Machine guitar virtuoso Tom Morello and the Coup's political firebrand-in-chief Boots Riley — has one ace in the hole: a full-fathom cover of LL Cool J's "Mama Said Knock You Out." If any song deserves to be bellowed over an electric-guitar maelstrom, it's LL's goofy ode to hip-hop-as-heavyweight-blood-sport. Elsewhere here, Morello and Riley are deserving of respect but sometimes hard to love, as Riley's sloganeering ("Revolution is the new 'fuck you!'") grows tiresome quickly.