Radio Fórmula

1500 AM began its life in the 1970s as XERH-AM "La Tropical Grande de México" with tropical music. In the 1980s, it became XEAI-AM (a callsign now on 1470) and adopted several formats, such as tropical music and general music. In 1998, the oldies Vida format at 1470 AM, then known as XESM, was moved to 1500.

It was not until 2000 that 1500 AM, rechristened XEDF-AM, became a news/talk station as part of Radio Fórmula's second national network.

The Segunda Cadena complements the Primera Cadena with different personalities, such as Ciro Gómez Leyva, currently Imagen Televisión's lead news anchor, Denise Maerker and Paola Rojas, the latter two Televisa journalists.