Kilden is located in the old harbour just next to Kristiansand city centre. It is home to the Kristiansand Symphony Orchestra, Agder Theatre and Opera Sør, and has four performance halls in a row, with the public spaces facing the evening sun and the fjord under the undulating roof, and rehearsal, production and support spaces facing the road at the back. The undulating forms reveal the outlines and entrances of the main auditoriums.
The halls are separate in-situ cast concrete boxes for acoustic isolation, seating from 700 to 100 people. The steel cantilever roof structure, from which the 126 solid oak frame elements of the wave are hung, is fixed to the halls. The three black facades are made of brushed and anodized aluminium panels. The foyer has a stage set-like atmosphere of colour and artificial light.