on august 31, 1987, an incognito radio station started broadcasting at the frequency of 107.5 on the fm band. playing what was then known as new wave, the station aired for a month, no call letters, no jocks. when they finally announced "this is dwnu, if you're listening, please call." after mentioning the phone number on air, the phone rang consistently for three hours. back then, its studios were located at paseo de roxas in makati.