Steen Duelund

Steen Aa. Duelund: A Pioneer in Audio Innovation

Welcome to our webpage dedicated to the legendary audio engineer and innovator, Steen Aa. Duelund. With a career spanning decades, Duelund has left an indelible mark on the world of audio with his groundbreaking contributions to loudspeaker design and technology. From his rise to fame in Denmark in the 1970s to his collaborations with industry giants, let's delve into the remarkable journey of Steen Aa. Duelund.

Rise to Fame and DIY Horn Designs

In the 1970s, Steen Aa. Duelund burst onto the Danish audio scene with his revolutionary DIY horn designs for full-range drivers. His innovative approach garnered widespread attention and admiration, propelling him to the forefront of the audio community. Duelund's designs not only showcased his technical prowess but also highlighted his passion for pushing the boundaries of what was possible in audio reproduction.

Silk Thread Suspension and Loudspeaker Drivers

Duelund's relentless pursuit of perfection led him to explore unconventional materials and methods in loudspeaker design. One of his notable achievements was his work on silk thread suspension for loudspeaker drivers. By experimenting with silk thread, Duelund achieved remarkable improvements in driver performance, achieving greater clarity and accuracy in sound reproduction. This innovation cemented his reputation as a true visionary in the world of audio engineering.

The Duelund Synchronous Crossover

Among Duelund's numerous accomplishments, his creation of the mathematics behind the Duelund Synchronous Crossover stands as a pinnacle of his work. This crossover design introduced an unprecedented level of precision and coherence in audio signal distribution. Its groundbreaking feature enabled an even phase turn for all drive units across all frequencies, resulting in a remarkably natural and lifelike soundstage that was unparalleled at the time.


Steen Aa. Duelund's dedication to sharing his knowledge and expertise with the world is evident in his article titled "THE ART OF BUILDING A LOUDSPEAKER TO THE END." This article, published to the world by renowned reviewer Harvey "Gizmo" Rosenberg, provided enthusiasts and professionals alike with insights into Duelund's meticulous approach to loudspeaker design. The article became a guiding light for those seeking to achieve audio perfection.

Involvement with Jensen Capacitors and Duelund Components

Duelund's impact extended beyond loudspeakers as he became the audio wizard at Jensen Capacitors. His work laid the foundation for the later Duelund components, showcasing his commitment to uncompromising quality. His contributions to the development of the Virtual Stack Foil principle further solidified his legacy as an innovator dedicated to advancing audio technology.

Collaboration with Gryphon Audio Designs

Duelund's expertise attracted the attention of Flemming Rasmussen, founder of Gryphon Audio Designs. This collaboration resulted in the creation of the Gryphon Cantata loudspeaker and the statement Gryphon Poseidon system. These achievements showcased Duelund's ability to seamlessly blend technical prowess with artistic expression, resulting in audio systems that transcended expectations.

In conclusion, Steen Aa. Duelund's journey through the world of audio engineering is a testament to his unwavering dedication to innovation and excellence. His DIY horn designs, work on silk thread suspension, groundbreaking crossover designs, and collaborations with industry giants have left an indelible impact on the audio community. As we celebrate his contributions, we honor a true pioneer whose legacy continues to shape the way we experience sound.