Wikipedia
XEPRS-AM, known as The Mighty 1090 (formerly XX Sports Radio), is an American-operated sports talk radio station targeting English-speaking listeners in San Diego. Its signal originates from Rosarito, Baja California, Mexico, and it broadcasts in English out of studios in San Diego. XEPRS is the flagship station of the San Diego Padres, San Diego Toreros men's basketball, San Diego State Aztecs football and basketball, and the San Diego Gulls. The station also used to air games for the Anaheim Ducks. Wolfman Jack immortalized XEPRS in the George Lucas movie American Graffiti.
XEPRS is a Class A, 50,000 Watt clear-channel station with a non-directional antenna daytime, and a three- tower array (directional) during nighttime hours (sunset to sunrise). XEPRS broadcasts on the frequency of 1090 kHz, a United States and Mexican clear-channel frequency.