Since 1946, the Norwegian Loudspeaker Company (DNH) has been at the forefront of loudspeaker design and innovation. With extensive investment in research and development, DNH have pioneered loudspeaker technology in many fields, including the world´s first explosion proof loudspeaker, shockproof loudspeakers for military installations, clean room equipment and fire resistant loudspeakers. We have a large range of industrial and marine speakers as well the first fully encapsulated underwater loudspeaker (Aqua 30)