Whilst DNH is renowned for being an industrial and commercial loudspeaker manufacturer, the company is probably best known as specialists in equipment intended for installation in harsh and hazardous environments.
DNH manufactured the world’s first explosion-protected (Ex) horn loudspeaker, H-60, as far back as 1962. This means that the loudspeaker is designed to prevent an explosion in the event of a fault within the unit. This was a robust die-cast aluminium device and, with development and innovation, DNH were able to manufacture an explosion-protected horn in a plastic material, DSP-25EEx, in 1985 (and still in production in 2021), another world first.
DNH have subsequently developed hazardous area ceiling and cabinet loudspeakers for internal installation, and even loudspeakers that have two completely separate sets of components that can be powered from the duplicated PAGA systems that are required in offshore installations. The plastic horn loudspeaker, DSP-15EEx, however remains the mainstay the DNH Ex product line with almost 200 variations of the product, including a long-flare, high output model demonstrating the DNH ability to react and adapt to many specific customer demands from this bestselling loudspeaker- Globally certified
- High efficiency
- Weatherproof
- Wide range of power/impedances
For 75 years DNH have supplied loudspeakers into projects throughout the world. One of the most prestigious in recent years has been the vast Al-Zour Refinery in Kuwait.
The Telecoms System Integrator (TSI) chosen to provide and integrate all the telecoms requirements for the project was Commtel Networks, Mumbai, India. who have been providing integrated communications solutions since 1998.In a refinery, a reliable Public Address and General Alarm (PAGA) System, is important, not just for general communication, but also for signalling evacuation in an emergency. It is vital that the equipment selected is able to provide clear and concise messages in a challenging, hazardous environment.
Commtel Networks engineered a site-wide, integrated multi-zone PAGA network, with in excess of 1,800 Zone 1 horns, Zone 2 horns and Safe Area horns installed.
Telecoms consultant Kev Kilgour comments “We required loudspeakers that are rugged enough to withstand the rigours of the environment and flexible enough to provide us with the necessary performance”
DNH manufacture a complete range of loudspeakers for use in hazardous areas.
DNH...makes the world sound
From its inception in 1946, an incredible 75 years ago, the DNH founder, Frithjof Edwardsen realised that if the company were to thrive, it would need to look way beyond its Norwegian homeland.
Initially export efforts were focused on Germany, The Netherlands and Denmark, before the first overseas office was opened in 1957 in Nurnberg, Germany.
Today, DNH GmbH in Hamburg, under the stewardship of Jens Mikalsen (top right), remains responsible for all DNH sales in Central Europe
In 1983, to deal with the burgeoning North Sea Oil business, DNH opened its UK office, which moved to its current location in Milton Keynes in 1993. In addition to the UK and Ireland, DNH World-Wide is responsible for sales to India, Australia and New Zealand. Keith Golds, pictured top left. is the General Manager.
The decision to enter the vast market of the USA was made in 2007 with the opening of an office/warehouse in Philadelphia. Guillermo Osorio (centre) is the Manager of DNH Speakers Inc, responsible for sales in the U.S, Canada and Mexico.
DID YOU KNOW?
DNH manufacture a range loudspeakers constructed with non particle shedding components for clean room applications.
Edvard Munch famous for painting "The Scream" lived in Kragero, Norway, the location of DNH A/S.
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