The Yardbirds may not have been as famous as their British Invasion contemporaries the Beatles, the Rolling Stones and the Who, but the pioneering blues-based combo introduced three of the most famous and influential guitarists of the rock era: Eric Clapton, Jeff Beck and Jimmy Page. Their innovations — a revved-up instrumental attack, controlled use of feedback, distortion and fuzz; and live, improvisational jams they called "rave ups" — paved the way for psychedelic rock, progressive rock, heavy metal, Southern boogie and even punk.