Sydney Opera House chief executive Louise Herron said patrons and performers were in for a treat, with the newly installed acoustics providing an enhanced experience.
“Artists and audiences are set to experience world-class acoustics in a venue that is more accessible, safer and better equipped to present the full breadth of 21st-century performance,” she said.
Hundreds of construction workers and engineers installed 18 new fuchsia-hued “petal” acoustic reflectors above the stage that synchronise with the music being played.
A new lift and passageway make it possible for wheelchair users and people with limited mobility to independently access all levels of the Concert Hall, including its northern foyer, for the first time.
There are also two new rehearsal rooms, funded by the late fashion designer Peter Weiss, for artists who use the Concert Hall.
The upgrades stayed true to the original interiors designed by Peter Hall, the architect who completed the Opera House after Danish architect Jorn Utzon acrimoniously left the project.
The revamp will be revealed to the public on Wednesday with a performance by the Sydney Symphony Orchestra.