mobile logo

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.
  • Range of Wind Pressures: Three blowers totaling 25 horsepower supply the organ with air ranging in pressure from 4" to 25".
  • Instrument Total Weight: 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.