KMXZ-FM has been broadcasting since 1988. KJYK-FM 94.9 was an Easy Listening station in the 1980s. KJYK was owned by Citadel Broadcasting, who sold it to Duchossois Communications. Journal would later acquire the station from Duchossois.
KJYK was known as K-Joy FM 94, and was one of the stations that carried Chuck Cecil's "Swinging Years" for many years in Tucson. KJYK 94.9 FM switched calls to KMXZ-FM 94.9 and changed formats in 1988. They started out as Soft AC station "Cloud 95" in 1988 and later evolved into Hot AC "Mix FM" in the mid-1990s.
In December 2007 KMXZ and Brad Behan of the Bobby and Brad Morning Show parted ways , with former KZPT afternoon drive personality Greg Curtis joining the morning show.
Journal Communications and The E.W. Scripps Company announced on July 30, 2014 that the two companies would merge to create a new broadcast company under the E.W. Scripps Company name that will own the two companies' broadcast properties, including KMXZ-FM. The transaction is slated to be completed in 2015, pending shareholder and regulatory approvals.