Juan Antonio Fernández Abajo was a Spanish voice actor and broadcaster, born in Zaragoza, Aragon, Spain, on February 21, 1938, and he passed away in Barcelona on February 6, 2008. While he was primarily renowned in Spain for his extensive career as a radio and television presenter, particularly in sports journalism and entertainment programming during the 1960s and 1970s, he also built a significant body of work in the field of dubbing.

In the 1980s, Fernández Abajo shifted his professional focus toward dubbing, working extensively as both a voice actor and a dubbing director in Barcelona. In this capacity, he lent his voice to numerous characters for the Spanish versions of films and television series. One of his notable credits in animation is the role of Dr. Víctor Frankenstein in the Spanish dubbing of the Japanese anime series Kyōfu Densetsu: Kaiki! Frankenstein. This series, an anime adaptation of the classic Frankenstein story, was dubbed into Spanish in 1986 at the Estudios Urquinaona in Barcelona.

Beyond his work as a voice actor, Fernández Abajo made a lasting contribution to the industry by founding a pioneering dubbing school and studio, Sincrotake, in Zaragoza in 1992. This initiative was aimed at training new generations of voice actors in the Aragon region, establishing a formal pathway for professional dubbing education outside of the traditional hubs. His legacy in the Spanish dubbing world is thus defined not only by his performances, such as his role in the Frankenstein anime, but also by his efforts to cultivate and professionalize the craft.