In 1966, Gordon McLendon bought KGLA(FM), Los Angeles and changed the calls to KADS(FM), running only commercials: local ads, commercials and national commercials.. It was targeted to grab business from the newspapers. The want ads were either their own voices into a telephone recording device or they could use professional announcers.

In August 1967, McLendon declared it to be a failure; returns to "regular programming". The decision was made to change call signs to KOST-FM and play "beautiful music."