64-foot Diaphone-Dulzian rank

Photo from Wikimedia Commons
Pipe Organ (Boardwalk Hall)
The largest pipe organ ever built, with 33,114 pipes/Everyday Objects
The Midmer-Losh organ at Boardwalk Hall in Atlantic City, New Jersey, is the largest pipe organ in the world by number of pipes. Built between 1929 and 1932, it has 33,114 pipes ranging from pencil-sized to 19.5 meters tall, seven manuals (keyboards), and a 64-foot Diaphone-Dulzian that produces a subsonic 8 Hz — a frequency so low you feel it more than hear it. Most of the organ is currently non-functional and under restoration, because maintaining 33,114 pipes is exactly as difficult as it sounds.
Measurements
Approximately 150 tonnes
64-foot stop; below human hearing threshold (20 Hz)
Smallest pipes
100 inches water column; extraordinarily high
600 HP of blowers to supply wind