Freddy K has been a techno activist since the early '90s, shaped by Rome's Sound of Rome movement, warehouse raves, and the legendary Mad radio shows. He started DJing at Sunday after-hours and in 1993 launched his influential Virus radio show, which soon expanded into parties, a booking agency, and a record shop. His 1995 debut album Rage Of Age, a dark fusion of Chicago acid and rock, remains a testament to Rome's pioneering techno sound.

After years touring with ACV, Freddy K stepped back from DJing to work behind the scenes at Rome's Remix record store, where he co-founded the Elettronica Romana label and helped launch artists like Donato Dozzy and Giorgio Gigli. In 2009 he relocated to Berlin, establishing KEY Vinyl two years later as a traditionalist techno label for DJs, with artists like PVS and Héctor Oaks helping define its sound.

Berlin reignited his passion for the dancefloor. He became notorious for marathon vinyl-only sets at Homopatik, sometimes stretching 16 hours, and began closing Berghain in 2015. His sets are mercurial and crowd-focused, mixing pure techno with unexpected choices like Soft Cell or Bronski Beat when the moment calls for it. The last 20 minutes, he says, are the most important.