The old site had a great explanation of Greggs Hammond organ and its setup. Any chance that can be reproduced over here?
Sure! 🙂 The “big brown thing” behind the Hammond B3 organ is a Leslie speaker. These speakers are also referred to as “rotating Leslies,” although I personally don’t know of any non-rotating Leslie speakers. Leslie is a brand name like Lego. Only one company, to my knowledge, makes them. They are still in production today and they are commonly mated with Hammond organs (although Hammond B3 organs are no longer manufactured, as far as I know). All Leslie speakers have internal motors, but different Leslies work in different ways. In some, the speaker elements themselves rotate. In others, the speaker elements are fixed in place inside of a spinning cylinder which has a hole in it. Basically, the Leslie speaker gives an organ that pulsating effect. Most organs have switches installed on them so that the player can turn the motor on and off. You will hear Gregg alternating between having the motor on and off. An experienced organ player will be able to manipulate the on/off switch quite
