[3] In 1964, Hubbard Broadcasting Inc. applied to the Federal Communications Commission (FCC) for a construction permit to build a new FM radio station to operate alongside KOB and KOB-TV.

The FM station was originally planned to begin broadcasting by Fall of that year with an antenna erected on the AM tower, and was slated to simulcast the AM programming.

[8] New FM competitors began broadcasting, but KOB-FM continued to dominate the market for many years.

It started using the slogan "Today's Best Music", rivaling the newly launched KCHQ-FM, "Channel 105.1", which returned the top 40 format to the market after a six-year absence.

KKSS, which had been facing a fierce rhythmic contemporary battle with KYLZ-FM, become the area's Mainstream Top 40 outlet a few weeks later.

The change was made in part to avoid confusion with sister station KKOB AM, who recently added an FM translator at 94.5 MHz.

[12] The KKOB-FM call letters were reassigned to 96.3 FM (formerly KBZU) on January 6, 2020, when that station began simulcasting the news/talk format of KKOB.