The station broadcasts in the Spanish language, carrying a regional Mexican music format branded as "Radio Bronco 1400 AM & 102.5 FM".

[2] In August 1966, station owner Franklin James sold KSPA to Rancho Broadcasting, owned by television engineer William F. Wallace, for $120,000.

[3] The following year, the station changed its call sign to KQIQ[4] and adopted a country music format, later switching to top 40.

In January 1974, the station changed its call letters to KAAP, flipping to an all-news format by the end of 1975.

In May 2017, KUNX flipped to a regional Mexican music format with the moniker and the brand name "La Super X".