Leslie Speaker Model 16
The Leslie speaker model projects the signal from an electric or electronic instrument and modifies the sound by rotating a baffle chamber ("drum")
The Beatles first recorded with a Leslie in June 1965 when George Harrison was overdubbing one of his lead guitar parts on "It's Only Love". Brian Wilson of the Beach Boys first recorded a Leslie in 1965 and used one for the title track of Pet Sounds, released the following year. The Beatles used a Leslie throughout the sessions for Revolver in 1966. After John Lennon had asked for his voice to sound "as though I'm the Dalai Lama singing from the highest mountain top", Abbey Road engineer Geoff Emerick rewired the input of the studio's Leslie so a vocal microphone could be attached to it.