The instrument
The Yamaha R-60B Tone Cabinet were originally sold with the Yamaha Ex-42 polyphonic organ, for which they were specially made.
The Yamaha R-60B is similar to Leslie speakers, which were widely used with Hammond organs. Leslie speakers are known for their rotating horns and drum speakers, creating a lush, swirling sound. The Yamaha R-60B speakers also include a rotary speaker system with three vertically rotating speakers that are switchable on/off at the player's option directly from the organ. The speed of rotation can also be controlled from the organ.