[2][3]: 9 [4][5] After decades of accumulated damage from water, building renovations, neglect, and insufficient funding, now a multi-million-dollar restoration program is gradually returning the organ to full operability.

[2] The organ was awarded four entries in Guinness World Records, including the largest and loudest musical instrument ever constructed.

Pennsylvania-based Anton Gottfried made some of the reed pipes, including the Brass Trumpet, Egyptian Horn, Euphone and Musette Mirabilis.

The German firm Welte-Mignon provided the Bassoon with papier-mâché resonators[6] and the wooden Tuba d'Amour for the Echo division.

The bottom five keys on the Swell manual (GGG to BBB) are in place mainly for cosmetic reasons, as most ranks have no pipes for these notes; however, they would sound if couplers were activated.

[3]: 302, 305  Since 2019, the 7-manual main console is named in honor of Frederick R. Haas, whose family foundation has generously supported the Midmer-Losh and other important pipe organs in the region.

It produces a frequency of 8 Hz, a tone that is more felt than heard, five octaves below middle C. The sound of the vibrating pallet is described as "a helicopter hovering over the building".

Also, when the 64-foot and 42+2⁄3-foot are combined, the resultant tone simulates a 128-foot stop, equivalent to 4 Hz on low C. Use of the Diaphone-Dulzian is rare, being used primarily in registrations of moderate volume.

Nonetheless, when the stop was first tested in 1930, it caused tiles to fall from the auditorium ceiling and structural elements of the building to rattle.

[3]: 108–109  The Grand Cornet was fully restored and brought back on line in 2023, returning "a signature clang" to the tone quality of the instrument.

Guinness also recognized the Grand Ophicleide in the Pedal Right division to be the loudest organ stop in the world (until it was surpassed by the Vox Maris, a 1-rank outdoor instrument that relies on compressed air, built for South Korea's Expo 2012).

[2][3]: 9 [4][5] It is very hard to determine exactly how many pipes the organ has, due to undocumented revisions made during its construction, followed by extensive damage that is still being repaired, further confounded by erroneous reports that have circulated over the years.

[3]: 69–70 The Auditorium Organ has not been fully functional since the 1944 Great Atlantic Hurricane, when the subterranean floors of the oceanfront Boardwalk Hall were flooded for days with seawater from storm surge.

Additional water damage resulted earlier from plumbing failures and later from leaking roof areas and air-conditioning equipment.

The organ's first 50 years also unluckily included the Great Depression in the 1930s, World War II in the 1940s, and then Atlantic City's gradual pre-casino decline through the 1970s.

For decades, tight government funding and staffing were insufficient to keep pace with the maintenance and repair needs of the world's largest pipe organ, despite the best efforts of its curators.

[20] Afterwards, a recording session took place, which captured the main organ's record-holders (the 64' Diaphone-Dulzian, and the 100" Tuba Imperial and Grand Ophicleide) shortly before the hall closed for a multi-year renovation.

Both organs experienced severe damage during the 1999–2001 renovation of Boardwalk Hall, due to inadequate planning and oversight and the carelessness of workers.

The organ curator position was furloughed, and Dennis McGurk's personal efforts to protect the instruments were no match for an army of construction contractors throughout the building.

The 32-foot Trombone stop was effectively entombed in the building's walls when an opening in the Left Upper chamber, which allowed the rank to speak through the grille in the ceiling, was sealed off.

As parts of the building were demolished for reconstruction, windlines to various pipe chambers were cut, with no effort to identify or protect the lines, nor any plans to re-route or repair them.

The elaborate electrical relay for the Left Stage chamber was cut out with no provision for its restoration, and various switching and control cables were severed.

[22] Since 2014, free half-hour noon concerts are offered Monday through Friday from May through September, excluding holidays and special events.

[23] On September 1, 2015, Nathan Bryson became the fifth curator of the Boardwalk Hall organs, to lead a dedicated crew of maintenance professionals and volunteers.

[24] The restoration effort focuses on re-leathering the full Auditorium Organ, as well as repairing damage to the original pipework and mechanical/electrical systems sustained from construction and water over the years.