The invention of the Soundboks festival speaker is becoming a feature film

More than a decade after three Danish high-school friends set out to build the ultimate festival speaker, their story is heading to the cinema. The film, titled "Lyden af succes" (The Sound of Success), has begun filming and is expected to premiere in Danish cinemas in late summer next year.

The story follows Jesper, Hjalte and Christoffer as they throw themselves into an entrepreneurial project inspired by the real-life friends who took a homemade speaker to Roskilde Festival in 2015. The three leading roles are played by Milo Campanale, Osvald Sand Pallesen and Ask Berntsen.

They are joined by Gustav Giese, Malaika Berenth Mosendane, Christian Tafdrup and Iben Dorner. Kino.dk reported that the production is now underway.

Soundboks has since become widely known for its robust and powerful speakers. The business story, however, has also included difficult financial results. The company lost 106 million kroner over the past four years, according to figures from its 2025 annual report cited by Detailwatch.

Revenue fell 17% in 2025 to 215 million kroner. The company recorded a loss of 19.8 million kroner, an improvement on the 31 million kroner loss reported in 2024. Soundboks nevertheless said it had high expectations for 2026, with plans to increase growth through new production and an expansion in Germany.