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KSUN (1400 AM) is a Spanish-language radio station broadcasting out of Phoenix, Arizona and serving the Phoenix metropolitan area. It is locally owned by the Marques brothers and operates a regional Mexican music format under the branding "La Mejor". The station is also the Spanish-language play-by-play home of Arizona Diamondbacks baseball games and Phoenix Suns basketball games.

KSUN LaMejor1400am logo.png
CityPhoenix, Arizona
Broadcast areaPhoenix metropolitan area
BrandingLa Mejor 1400
Slogan¡Aquí Nomás!
Frequency1400 kHz
Translator(s)K293CO (106.5 MHz, Phoenix)
FormatRegional Mexican
Power1,000 watts
Facility ID21430
Transmitter coordinates33°23′23.00″N 111°59′52.00″W / 33.3897222°N 111.9977778°W / 33.3897222; -111.9977778
Callsign meaningValley of the SUN (a common nickname for the Phoenix area)
Former callsignsKONI, KXIV
OwnerMarquez Communications, Inc.
(Fiesta Radio, Inc.)
WebcastListen (requires RealPlayer or Winamp)


KSUN Radio Fiesta logo

1400 AM in Phoenix received its license in 1955; originally KBLR, the station's callsign became KONI by the time it signed on and KXIV in 1961. Through the mid-1980s, KXIV was programmed with a middle of the road (MOR) music format. The station was co-owned by Ira Lavin and actor Dick Van Dyke (a Phoenix resident). Disc jockeys included George Scott, Jack Dey, Jim Hutton, Paul B. Mundt, and Jim Spero (who also served as program director).[1]

The station changed to a Spanish-language format in 1987, adopting the long-running name Radio Fiesta.[2]

In 2015, the station partnered with Mexican radio company MVS Radio to launch its regional Mexican La Mejor format in Phoenix. However, KSUN retained its local sports coverage and events, thus airing it under the Deportes MVS brand.


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