The Sound of Rotary Speakers Jazz greats like Jimmy Smith, Jimmy McGriff, and Shirley Scott used it. Funky and soulful players like Art Neville of The Meters and John Medeski of Medeski Martin & Wood: check. It’s integral to the sound of Gregg Allman’s organ playing, and is an indispensable ingredient in the famous organ solo … Continue reading History of Rotary Speakers