On November 27, 1977, the stationsigned on as KCMS, playing classical music. The station was founded by broadcast engineer Paul Posen under his company, Classic Broadcasting. The original studios were located in Indio. Its relays were KCBI 97.3, when it was affiliated with CBS Radio, and KECI 97.7, broadcasting into the Imperial Valley/Imperial County. In October 1983, the station changed its call sign to KEZN. By 1987, the studios were moved to a new facility in Palm Desert.
Switch to soft AC
In the early 1990s, the station switched to the nationally syndicated "Format 41" soft adult contemporary service of the Unistar Radio Network. In 1994, KEZN became the only AC station in the Palm Springs market when KPLM flipped to a country music format. Noted Los Angeles broadcaster Russ O'Hara teamed with local personality Kayla Stone for the "Russ and Kayla" morning drive time show, as the station eliminated the Format 41 service to go with local programming. Another local DJ, Debra Kaye Ahlers, occupied the midday shift, while program director Dale Berg, a noted personality from Orange County, handled afternoon drive. Later, former Nashville Network announcer Dan McGrath took over morning drive, while former KCLB personality John O assumed the afternoon slot. In 1996, Gary Bell arrived from KCBS-FM in Los Angeles. Ryan Yamanaka also served as an on-air personality from 2000 to 2001 working the overnight shift. He was also the last personality to drive KEZN's "Mr. Frosty". The early personalities helped propel KEZN to be among the top rated stations in Palm Springs.
CBS ownership
In June 1998, Posen sold his interest in the station to CBS Radio. Through the early 2000s, the station's format was moved from Soft AC to mainstream adult contemporary. Each year from mid-November to December 25th, KEZN switched to all-Christmas music. Infinity would be renamed CBS Radio in December 2005. On December 26, 2014, after its annual Christmas format wrapped up, KEZN rebranded as "103.1 Sunny FM", with no other changes. During its Sunny FM years, the station each weekend aired the syndicated program America's Greatest Hits hosted by Scott Shannon.
Entercom ownership
On February 2, 2017, CBS Radio announced it would merge with Entercom. The merger was approved on November 9, 2017, and was consummated on November 17. Also in 2017, KEZN relocated to the old R&R Broadcast building in Palm Springs, located on Tahquitz Canyon Way. On November 1, 2018, KEZN flipped to Entercom's LGBTQ-targeted Talk/EDM network branded as "Channel Q", marking the first analog FM station adopting the format. The next day, KEZN changed call letters to KQPS. The station is a reporter in Billboard'sDance/Mix Show Airplay panel.
