KFMB-FM aired a “beautiful music” format from the 1960’s until February of 1975. In March of 1975, KFMB-FM became known as B-100. Under the direction of Bobby Rich the B-100 format featured a top 40 music playlist blended with high energy/high profile on-air personalities. In the fall of 1977, B-100 made radio history becoming the first FM station in the United States to claim the number one ranking in a major market. (Source: Arbitron Survey FALL 1977.)
Over the next two decades B-100 was "often imitated but never duplicated," and quickly became the industry’s FM-band leader in innovative programming for the CHR and ACHR formats. Although music was always the foundation of B-100’s programming, the on-air personalities that reflected the lifestyle of San Diego were the hallmark of the station. All of San Diego’s top disc jockeys have spent time with B-100 including Beaver Cleaver, Willie B Good, Gene Knight, Gary Kelley, Danny Wild, Glen McCartney, JR Rogers and Phil Flowers.
B-100’s first radio star was added to the mix when legendary San Diego disc jockey Shotgun Tom Kelly was hired in 1976 to perform in the morning. Shotgun is one of a few radio personalities to receive a star on the Hollywood walk of fame. Popular TV personality Larry Himmel anchored mornings in 1980 and in 1984 Bobby Rich returned to B-100 to create one of San Diego’s most successful morning shows: "The Rich Brothers." Bobby Rich, Scott Kenyon, Frank Anthony and Pat Gaffey would occupy mornings for the next five years.
In 1989 Jeff & Jer took over mornings and became San Diego’s most listened to morning show. In March of 1994 KFMB-FM became Star 100.7 and subsequently changed its morning show. In January of 1997 the "Jeff & Jer Showgram" returned to KFMB-FM. Success quickly followed: in 1998 KFMB-FM received awards for Station of the Year, Personalities of the Year and Program Director of the Year. Over the next ten years Star 100.7 would have an impact on the San Diego radio landscape producing such memorable promotions as "Whirl till you Hurl" and "Jingle Ball."
In April of 2005 KFMB-FM became Jack-FM. Jack-FM was known for "Playing What We Want" and presented a unique blend of music combined with comments and observations from "the voice" of Jack. In August of 2010 Jack-FM became the new home of The DSC (Dave, Shelly and Chainsaw) featuring Dave Rickards, Shelly Dunn and Cookie Chainsaw Randolph. Other cast members include Chris Boyer, Emily Maquire and Ruth Sixty Six. To this day the DSC has maintained its status as the dominant morning show in San Diego.
On January 4th, 2016, the station flipped from Jack-FM to “100.7 KFM-BFM San Diego.”
The station's new tag-line became “True Variety, That Rocks,” and took on a “playing whatever, whenever,” approach, while featuring a diverse music library curated specifically to the tastes and lifestyle of San Diego.
The rock and classic alternative music format also brought back the station's proper name by using the iconic call letters, KFMB-FM.
The “DSC Show” remained unchanged on the station, airing 5:00 to 10:00 AM, Monday through Friday, with all cast members returning.
On March of 2017, Mike Vasquez became the Program Director for the station and in July, "The Mikey Show" with Mikey Esparza was added to its programming line-up to anchor the afternoon drive from 3pm - 7:30pm.