Blues Radio 91.1
in 1992, General Station Broadcasting Company acquired Blues Radio 91.1.
Manila's Shreddin' Rock
In 2000, DZAK-FM switched to the new hot adult contemporary format of Zack FM, a Pinoy version of the Bob FM format popular in the United States.
In 2009, DZAK-FM reverted to it's pre-2000 mainstream rock format in an attempt to provide a harder-edged alternative to the lite rock stations in Metro Manila. The station's first song as Rock 91.1 was "Kickstart My Heart" by Mötley Crüe.
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