ˌɛksˌeɪtʃˌɛfˈoʊ sˈaɪnd ˌɔn ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti nˈaɪn æz "ɹˈeɪdɪˌoʊ tɹˈaɪənfˌædoːɹə", bˌiːɪŋ ɹᵻnˈeɪmd tuː "kɹˈɪstəl ˌɛfˈɛm" ɪn nˈaɪntiːnhˈʌndɹɪd ˈeɪɾi tˈuː, wɪð ɐ kəntˈɛmpɚɹˌɛɹi spˈænɪʃ mjˈuːzɪk fˈɔːɹmæt.
XHFO signed on in 1979 as "Radio Triunfadora", being renamed to "Crystal FM" in 1982, with a contemporary Spanish music format.