With Jumpin' Jack Flash and Street Fighting Man I'd discovered a new sound I could get out of an acoustic guitar. That grinding, dirty sound came out of these crummy little motels where the only thing you had to record with was this new invention called the cassette recorder... Playing an acoustic, you'd overload the Philips cassette player to the point of distortion so that when it played back it was effectively an electric guitar...There are no electric instruments on Street Fighting Man at all... All acoustic guitars. Jumpin' Jack Flash the same. I wish I could still do that, but they don't build machines like that anymore.
- Keith Richards, Life (2010)