OK for all you young folks. Jimmy Smith was known as the the King of the Hammond Organ. Born out of gospel he delivered jazz on the B-3 organ. Timeless music. I have a B-3 that my dad bought me when I was 16. Now 63 , the Hammond organ is still kicking. Hammond went out of business because they made a product that will last a lifetime. The organ speaker was known as a Leslie named after it's inventor. Designed to sound like a church pipe organ it was named the "pipe voice of the Hammond organ". Today all the rock bands have an organ sound modeled after this organ. Too cool.
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From @tbave