KFBT

In the late 1970s, the station broadcast a contemporary hit radio (CHR, also called top 40) format known as "K104 FM" from its studios in a vineyard between Fresno and Hanford.

Playlists from 1985 show Magic 104 give heavy airplay to dance-oriented artists such as Sheena Easton, Prince, and Teena Marie, while K-Boss emphasized rock music from the likes of Billy Squier, Bruce Springsteen, and David Lee Roth.

By the end of the decade, however, KMGX began to lose audience share to a growing number of Spanish-language stations in the market, leading to the discontinuation of the churban format in mid-1989.

[4] This new iteration of 103.7 FM was launched by Southern California broadcasting veteran Jim Votaw, X104 exec Chuck Lontine, and programmer Brian Burns.

One prominent promotion was a weekly giveaway of $10,000 to randomly spotted owners of cars sporting the station's bumper/window stickers, who called into the studio within an allotted time.

Rounding out the staff were Chris Daniel in evenings and Scott Stevens in overnights, and part-time/weekender, Dave Rodgers, who also worked for two years at KMGX X104.

E. Curtis Johnson remained in the Fresno market after leaving KRZR in 2007, assuming the program director position at One Putt Broadcasting from 2008 to 2014, followed by the same role at Lotus Communications' active rock outlet KKBZ in April 2019.

[7][9] Dave Rodgers (Ken Richards) remained on KRZR until October 2003, continued at KJUG FM in Visalia from 2004 to 2011, and since 2014 has worked weekends at KUZZ in Bakersfield.

On October 6, 2010, at noon, after playing Rage Against the Machine's "Freedom", KRZR changed its format from active rock to rhythmic adult contemporary.