XEFZ-AM
XEFZ-AM is a radio station on 660 AM in Monterrey, Nuevo León. It is owned by Grupo Radio Alegría and carries a news/talk format known as ABC Radio, named for the newspaper of the same name in the state.History
XEFZ received its concession on March 29, 1971. It operated on 1110 kHz as a 250-watt daytimer. Not long after, XEFZ moved to 660 and ramped up its power to 10,000 watts.