KBUE

A Federal Communications Commission construction permit for 105.5 FM was issued to Saul Levine in 1957 as KBCA. However, Levine did not get the station built, even though he would go on to own KKGO and other California stations. Finally, on New Year's Day, 1961, KLFM signed on the air.[3] It was owned by the Harriscope Music Corporation, with Bert Harris serving as president and general manager. The station was initially powered at only 330 watts, keeping its signal restricted to Long Beach and adjacent communities. KLFM's studios were initially located in a trailer adjacent to its transmitter on Signal Hill, moving to Lakewood Center and then to 4406 Greenmeadow Road. KLFM played Top 40 hits in an era where most young people used AM radios to hear their music. In the 1960s, most FM stations simply simulcast their co-owned AM stations, or played easy listening or classical music, often using broadcast automation.

Harriscope sold KLFM in 1966 to the McCray Broadcasting Company, headed by W. Mike McCray, Carl C. Loucks, and Robert Switzer.[4] McCray changed the call sign to KNAC and instituted a full-time Middle of the Road (MOR) format. The next year, the International Cities Broadcasting Corporation bought KNAC and increased its power to 2,100 watts. Additionally, KNAC relocated to the International Tower in downtown Long Beach.

In late 1967, the station began programming progressive rock from 6pm to 6am. The programming proved successful enough to make the rock format full time by 1969, when Harden Broadcasting bought KNAC. Air talent at KNAC during this era included Jim Ladd (later of KLOS), Jerry Longden (later of KROQ) and Program Director Ron McCoy. Ladd left KNAC to work for KLOS in 1971, while McCoy stayed on through much of the 1970s. The station stayed with progressive rock until 1980, when it made a significant adjustment in its rock format.

In 1980, the station adopted one of the first full-time commercial alternative rock formats in the country. Up to that point, Pasadena-based KROQ-FM and stations in Phoenix, Seattle and New York City had attempted such formats. KROQ-FM notwithstanding, most commercial attempts at alternative rock were short-lived. KNAC began using the slogan "Rock and Rhythm" and programmed a mix of Contemporary "New Wave", Techno, Commercially-Viable Punk and fitting Classic Rock from the 1950s and 1960s. The station gathered media attention, but it was dwarfed by KROQ-FM's stellar ratings and Rick Carroll-consulted "Rock of the 80s" Alternative format. In late 1985, KNAC was acquired by Fred Sands, a Los Angeles-based realtor.

On January 8, 1986, the station flipped to a "Hard Rock/Heavy Metal music" format, the first of its kind on a commercial station in the United States. Several air staff members of the heavy metal station went on to the original satellite-distributed, nationally syndicated "Z Rock" format the following September. While much of KNAC's core-base of artists were considered mainstream, the station played enough "cutting edge" artists of the day and acquired a legend that survived long beyond its demise in spring 1995. The station inspired tribute pages and a radio station on the Internet. However, revenues were not what management had hoped for.

In 1995, Liberman Broadcasting, a Spanish-language broadcasting company, bought KNAC for $13 million.[5] KNAC switched to the KBUE call letters a few weeks later on March 6. The format was "Ranchera-Mexican style," said program director Fidel Fausto.[6] The new call letters and format did not change the fact that KBUE's signal only covered southern Los Angeles County and northwestern Orange County. Liberman would buy additional radio stations to increase the coverage of the Que Buena format.

The station at 94.3 FM in San Fernando first signed on the air as KVFM in 1958, but for a long time it was KGIL-FM, a radio station playing adult standards, along with sister station to KGIL AM 1260. On August 5, 1989, it became KMGX, "Magic 94.3".

The station at 94.3 FM in Garden Grove signed on in 1961 as KGGK, later to become KTBT, KORJ, KIKF ("KIK-FM", a country music station), and KMXN.[7] When it was acquired by Liberman Broadcasting, it switched to KEBN, another call sign representing the "Que Buena" format.

On November 18, 1994, the two stations on 94.3 began simulcasting the same country music format and 94.3 in San Fernando became KYKF. This lasted until October 31, 1996, after the San Fernando station was sold to Liberman and started simulcasting KBUE. On January 31, 1997, it acquired the KBUA call letters. "Que Buena" now reached most of metropolitan Los Angeles County, though reception remains difficult in some regions, such as the San Gabriel Valley and Malibu. A booster station, KBUA-FM1 in Santa Clarita, California, extends the signal's reach into the Santa Clarita Valley.

On June 25, 2000, 94.3 in Garden Grove became "Cool 94.3" in Anaheim, with a "cool AC" format (somewhat of a precursor to the Jack FM format), and the call letters changed to KMXN on September 29. That call sign was likely being chosen because the format was similar to previous Orange County station KXMX known as "Mix 95.9" (now KFSH-FM). Liberman acquired KMXN in 2003, and on January 7, started simulcasting the KBUE/KBUA signal, giving "Que Buena" coverage in nearly all of Orange County. On May 15, the call letters became KEBN.