Leslie Speaker

The Leslie speaker is a specially constructed amplifier/loudspeaker used to create special audio effects using the Doppler effect by rotating the speakers or a sound-directing duct. Named after its inventor, Donald Leslie, it is particularly associated with the Hammond organ but is used with a variety of instruments as well as vocals. The Hammond/Leslie combination has become an element in many genres of music. The Leslie Speaker and the Hammond Organ brands are currently owned by Suzuki Musical Instrument Corporation.