KXSC (104.9 FM) is a radio station based in Sunnyvale, California, serving the San Francisco Bay Area. It is owned by the University of Southern California and airs a classical music format.
KXSC broadcasts in HD.
KXSC (104.9 FM) began in 1961 as KHYD, a 3,000 watt station operating from a house on Mowry Avenue in Fremont, California. The station call letters changed to KFMR in 1964. Under new ownership in the early 1980s, KFMR aired a religious format, but in 1983, it became Spanish-language KDOS.
By December 1983, the station adopted KBRG, call letters that had been abandoned by another station earlier that year. The station continued the Spanish-language music and variety format, and the Oakland Athletics baseball games in Spanish, with Amaury Pi-Gonzales as announcer. The station was still licensed to Fremont, California.
On December 31, 1997, in a three-station frequency swap, KBRG moved to 100.3 and 104.9 became KUFX.
In August 1998, the station's owners (Jacor) changed the format to modern adult contemporary and the call letters to KLDZ. Six months later, the format and call letters were changed to new wave music/alternative rock classics KCNL, which was switched to alternative rock on January 15, 2001.