Triple M

is a radio network owned by Southern Cross Austereo. The rock music stations broadcast in Sydney, Melbourne, Brisbane, Adelaide; and between 1994 and 1997 in Perth. started with the arrival of commercial FM radio in 1980.

In 1997 Austereo buys PMFM (Hit 92.9) and KYFM (Mix 94.5) in Perth. With the "2 station rule", Triple M Perth is sold and returned to 96fm; leaving the current four station Triple M network.
 * 1980 : Triple M launches in Sydney. Whilst EON FM launched in Melbourne, FM 104 in Brisbane and 96fm in Perth
 * 1986 : Hoyts Media, owner of Triple M Sydney, buys EON FM
 * 1987 : Hoyts Media buys 96fm
 * 1988 : Hoyts Media buys FM 104. EON FM and FM 104 start using the Triple M name, expanding the brand to the three eastern state capitals
 * 1993 : Adelaide's KAFM, that converted to FM three years earlier, is bought by Hoyts Media. KAFM starts using the Triple M name
 * 1994 : Austereo (now Southern Cross Austereo) buys Triple M. They rename 96fm as Triple M to complete the five capital city network