Throughout the 1980s, the station played an eclectic mix of R&B, jazz and soft pop, reflecting the diverse music culture of the Bay Area. KBLX was the inspiration for the creation and launch of various adult contemporary radio formats across the country, from Smooth Jazz to soft rock AC to Urban AC, the latter which KBLX modified its format to years later. (The Urban AC terminology did not exist until 1988). Even then, for some time the station played mostly smooth R&B, rarely playing any uptempo R&B, current or old school. This was done to establish the station's own identity apart from competition from now-defunct Urban stations KSOL and KDIA, or its current competitors KMEL, KYLD and KISQ. The station's musical selection was also forged by its intense competition with smooth-jazz arch-rival KKSF.