89.5 WIM had its early beginnings way back in August 1991 , when Baguio was still recovering from the ruins of the July 1990 killer quake . Bombo Radyo Philippines decided to widen its broadcast horizon in Baguio by putting up an FM Station to “ set the pace ” and at the same time , to augment the present status then being enjoyed by its AM counterpart in the city of Baguio . Test broadcasts began on August 21 , 1991 . The station carried " The Rhythm of the City " monicker . Shortly after , in a matter of half a year , the Radio Research Council , through its deputized survey agencies conducted the official radio listenership survey in Baguio . In less than one year of opeation , 89.5 WIM , The Rhythm of the City bagged the number one crown , leaving behind its competitors by a unanimous landslide
July 1990 killer quake
1990 Luzon earthquake
DWIM-FM