The Cathedral organ was built by George Fincham & Sons, Melbourne in 1962-64. It incorporates a substantial part of the instrument built in the West gallery of the Cathedral in the late 1870s by Robert Mackenzie and completed in 1880 by George Fincham. Refurbished with additions by Australian Pipe Organs, Melbourne in 1996-97, it is used for occasional recitals and recordings, as well as serving the regular liturgical needs of the Cathedral.
The specification of the organ comprises 81 speaking stops spread over four manuals and pedals. Some of the stops can be dated to 1880 or 1896, when the instrument was enlarged. Several new stops were added in 1997 at the time of the centenary of the Cathedral.
