On March 13, 1979, Armadale Communications was awarded a license for a new FM station in Winnipeg, to broadcast on 103.1 MHz.

The call signs have changed quite a bit over the years, from CHZZ-FM (Z103) to CKLU-FM (103 U FM, then briefly Mix 103) and then finally to CKMM-FM.

Toronto jock and voiceover Adrian Bell replaced well-known jock Don Percy in Mornings, with beloved Winnipeg broadcaster Maureen Murphy sharing morning show duties.

On October 29, 2007, Astral Media took over CKMM as a result of a buyout of Standard Radio.

As part of Astral's merger with Bell Media on June 27, 2013, sister station CFQX and Bell's CHIQ-FM were sold to the Jim Pattison Group in order to meet ownership limits.