A four-piece band is the most common configuration in rock and pop music—typically two guitarists, a bassist, and a drummer. Vocal duty is usually the responsibility of one member, or is shared. Another common formation is a vocalist, electric guitarist, bass guitarist, and a drummer. Either way, a group of four is harmony personified, a symmetrical ensemble that together makes for great music. But who is considered a classic quartet?
Click through this playlist of the foremost bands in music history.