The station's studios are located in San Diego's Kearny Mesa neighborhood on the northeast side, and the transmitter is atop Mt.

At the time, Califórmula owned a Tijuana station broadcasting on 95.7, XHKY-FM, and was causing interference to KKOS and co-channel KFSH-FM in Anaheim.

On January 5, 2004, “Kool” moved to XHHCR-FM 99.3 (rechristened XHOCL-FM), and 95.7 adopted XHHCR's country format as US 95.7 (the callsign was then changed to KUSS).

[9][10] The simulcast with KOGO ended on November 16, 2012, at 7 p.m., when KOGO-FM began stunting with Christmas music as Holiday 95.7 (though it was promoted on-air as simply "95-7 FM").

At Midnight on December 26, the station completely shifted to a rhythmic adult contemporary direction, dropping the pre-1989 songs from their playlist to focus on the 1990s, 2000s and current material, and changed their slogan to "Today's Rhythm and All the Best Throwbacks".

At that time, after playing "Ignition" by R. Kelly, KSSX rebranded as "Jam'n 95.7" under the direction of program director Rob Scorpio.

[19] Under the new format, KSSX is the second station in San Diego to adopt the Jammin brand (though as Jam'n), which was previously utilized by XHITZ off and on from the 1990s through the 2010s.

For the longest time, operation of the HD2 subchannel was contracted to the EMF, and like most HD capable urban stations, carried the Air 1 network.

In the light of the George Floyd protests, iHeart terminated the agreement with the Association for Community Education in June 2020, and replaced it with news radio.