B105 (call sign 4BBB) is a commercial FM radio station broadcasting in Brisbane, Queensland, Australia, on a frequency of 105.3 MHz, and is part of Southern Cross Austereo's Hit Network.
The B105 studio complex remained at the Bowen Hills location until July 2000, when Austereo relocated B105 and sister station Triple M into new combined premises at 309 North Quay, Brisbane.
[4] The new complex was the first in Australia to use the now defunct Klotz Digital audio system, which was revolutionary at the time however was replaced during a 2016 studio upgrade with Axia Fusion.
In 2002 a new solid state Harris Z10CD transmitter was installed at the newly created TX Australia facility, located under the TVQ Ten tower.
The existing HT10 transmitter now serves as a backup facility located at the BTQ Seven tower, 1 kilometre (0.62 mi) away from Channel Ten on Mount Coot-tha.