Rotary Leslie Speaker Horn rotates on top. Bass speaker fires into rotating drum at bottom. There are slow fast speeds of rotation. I like the in between, like turning on a fan then off quickly. Very moving sound!
Hammond B-3 1957 w/ Leslie Speaker 1956 . B3 Organ & Original Bench & Pedals
Hammond organ with Leslie Speaker. They used to laugh at me when I played this, as my feet could not hardly touch the pedals. If you stood in front of it, you could not see me playing. Then you look again and its a child playing.