This is what we found on Wikipedia regarding the Sydney Symphony Orchestra:

The Sydney Symphony Orchestra (SSO) is an Australian symphony orchestra based in Sydney. With roots going back to 1908, the orchestra was made a permanent professional orchestra on the formation of the Australian Broadcasting Commission in 1932. The orchestra has performed at the Sydney Opera House as its home concert hall, since the venue's opening in 1973. Simone Young is the orchestra's current chief conductor and the first female conductor in the post.

The Sydney Symphony performs around 150 concerts a year to a combined annual audience of more than 350,000. The regular subscription concert series are mostly performed at the Sydney Opera House, but other venues around Sydney are used as well, including the City Recital Hall at Angel Place and the Sydney Town Hall. The Town Hall was the home of the orchestra until the opening of the Opera House in 1973. Since then, most concerts have been taking place in the Opera House's Concert Hall (capacity: 2,679 seats).