The 105.9 frequency has broadcast Spanish-language programming since 1996. It was a Spanish Adult Contemporary format called "Radio Romantica" from 1996-2002. It had changed to a Regional Mexican format station called "Radio Tricolor 105.9" in October 2002. In July 2004 it changed to a Latin pop music format called "Super Estrella" until November 2008.
In the 1980s it was a top 40 station called "Q 106" as KNMQ-FM. In 1990 it changed to a country music format as KOLT-FM ("Kolt 106"). It briefly shifted to a classic country format in 1996 called "Krazy 105.9" with the present day KRZY-FM call letters until the fall of that year when the station was sold to Spanish-language broadcaster EXCL Communications which Entravision took over in 2000.