This band played covers of artists such as Led Zeppelin, Santana, Humble Pie, Traffic, Crazy Horse and Deep Purple, and Freddy Marshall performed as drummer.

In 1978 he met Paul Gillman and the Picozzi (Giancarlo and Giorgio) brothers, who were trying to form a band and they asked Marshall to join the group.

The first original song performed by Power Age was a theme called "Paper Life", composed by Freddy Marshall during his stay in Equos Reverber Band.

Arkangel shared stage with Scorpions, Joe Perry Project, Barón Rojo, Harlequim, Wrabbit, REO Speedwagon and Rick Wakeman when these artists performed in Venezuela, the band also took part in the Román Chalbaud's motion picture called "Cangrejo", with some of their songs being included in the sound track and appearing in some scenes of the film.

In addition to his work as musician, Marshall was the executive producer on the Arkangel's "No Más Apariencias", "Inmortal" and "El Angel de la Muerte" albums.