WSOS-FM went on the air on 105.5 MHz as WMKM, licensed to
St. Augustine, Florida. Its original construction permit was filed on August 10, 1981. WMKM changed callsigns on March 19, 1985 to WSOS, and on September 3, 2002, the station became WSOS-FM with the acquisition of
WKLN (which took the WSOS callsign). By the time WSOS-FM was sold to Renda Broadcasting in 2005, it was running an
adult contemporary format as "The Muuusic Station". Under Renda's ownership, the community of license was changed from St. Augustine to
Fruit Cove, to better serve the Jacksonville market. The signal still originated in St. Augustine until March 9, 2011, when it switched formats from soft adult contemporary to classic rock. On April 5, 2016, WSOS-FM changed their format from a simulcast of contemporary Christian-formatted
WMUV to a simulcast of talk-formatted
WBOB. On May 23, 2018, WSOS-FM switched from the WBOB simulcast to a simulcast of classic country-formatted
WYKB, branded as "Jax Country". In January 2020, Jax Country became exclusive to WSOS-FM. On November 26, 2024, it was announced that Chesapeake-Portsmouth Broadcasting would be selling WSOS-FM to Norsan Media. As part of this deal, the Classic country format would permanently move to 100.3 W262AG and
WMUV-HD2. This will make WSOS-FM the sixth station in the Jacksonville market to be owned by Norsan Media. In mid-December 2024, WSOS-FM flipped to Spanish tropical under the branding "Kaliente 94.1". ==Previous logos==