Rock couldn’t happen until the electric guitar was invented. Pickups and amplifiers meant the guitar could be heard with a drum kit, and they made distortion possible. Yet the electric guitar didn’t bury the acoustic, and almost every great rock album is full of both. Sometimes they’re double-tracked with distorted riffs for depth and clarity, sometimes they’re songwriting workhorses, and sometimes they provide contrast to the onslaught of electrics. Lists of all-time greatest rock songs are dominated by acoustics: Stairway To Heaven, Hotel California, Hey Jude, Brown Sugar. Strumming just isn’t the same on electrics, and sometimes a mix just needs an acoustic. Here are the acoustic guitars that rock couldn’t live without.