KCAQ was one of the first FM stations to go on the air in the Oxnard/Ventura radio market, having signed on in 1958 as KAAR. Prior to becoming KCAQ (originally known as Q-105 when it was mainstream), the station was easy listening KACY-FM and by 1978, the station was soft rock KPMJ (known as K-105). KCAQ originally started out as a mainstream Top 40 in 1983, but by 1988 it shifted to a Rhythmic Top 40 direction after KYMX, its Rhythmic competitor, flipped formats to Country. KCAQ continues in its current Rhythmic direction today, as its musical fare includes R&B/Hip-Hop, Dance and Rhythmic Pop hits.
The original Q105 on-air staff included E. Curtis Johnson in mornings, Johnny Dolan was the 1st program director in middays, followed by Brian Thomas in afternoons who later replaced Johnny as PD. Nights were hosted by Gwen Johnson and later Famous Amos who was popular with the teenage demographic and Jay Porter hosted late nights. Q105 was an immediate ratings success climbing to #1 with double digit ratings in both the Arbitron and Birch ratings reports. Harold A. Frank was one of the partners of KCAQ and its first general manager.