I love the Leslie speaker and that's what I thought of at first (by the name) as well but upon closer inspection it really isn't very similar after all. Check t

I love the Leslie speaker and that's what I thought of at first (by the name) as well but upon closer inspection it really isn't very similar after all. Check the videos linked here in other comments https://www.youtube.com/watch?v=NZKCxIuJ-5M https://www.youtube.com/watch?v=NZKCxIuJ-5M to get an intimate understanding and then you'll see how it really is a linear actuator.