Kimmel Center for the Performing Arts

About the Organ


The Fred J. Cooper Memorial Organ
America's Largest Concert Hall Organ is Here!
The Fred J. Cooper Memorial Organ, Dobson organ Op. 76, ranks as the largest mechanical-action concert hall organ in the United States. With its nearly 7,000 pipes, four blowers, 300 levels of memory, 111 stops, pipe sizes ranging from about the size of a drinking straw up to two feet square by 32 feet high, this is truly the King of Instruments!

Organ Facts

  • Largest Pipe: Built of wood, the largest pipe is approximately 2 feet square by 32 feet long.
  • Smallest Pipe: Built of metal, the smallest pipe is the size of a drinking straw.
  • Range of Wind Pressures: Three blowers totaling 25 horsepower supply the organ with air ranging in pressure from 4" to 25".
  • Instrument Total Weight: The total weight of the organ and its structure is approximately 32 tons.
  • Total Number of Pipes: 6,938
  • Levels of Memory: 300 (meaning thousands of preset combinations can be stored for the organists' use during performance)
  • Number of Combination Pistons: 48
  • Number of Toe Pistons: 22
  • Where does the Verizon Hall Organ rank in size?* 47th in the world (Interestingly, Philadelphia’s Wanamaker Organ is the largest fully functional pipe organ in the world.)
    *Based on total number of ranks.