There would be no SoCal punk without X, but when they burst onto the L.A. scene in 1977, they sounded like no other punk act. Dual vocalists John Doe and Exene Cervenka weaved harmonies that harkened back to high lonesome country. Guitarist Billy Zoom rumbled and rattled like a Chevy V8 engine and drummer DJ Bonebrake brought a sense of swing to punk’s jackhammer muscle. X’s mix of edgy rock and traditional roots music is still distinctive today.