People | Business

New “High-Quality Horn Loudspeaker Systems” Book Now Available

In-depth text on the history, theory, and design of horn loudspeakers co-authored by Celestion’s Bjørn Kolbrek and Thomas Dunker available at Parts Express in the U.S.
"High-Quality Horn Loudspeaker Systems" by Bjørn Kolbrek and Thomas Dunker.

Celestion has announced the new book High-Quality Horn Loudspeaker Systems, authored by by the company’s Bjørn Kolbrek and Thomas Dunker, which is available at Parts Express in the U.S. as well as from Celestion’s U.K. distributor Lean Business Audio.

The text is a detailed volume of more than 1,000 pages addressing the history, theory, and design of horn loudspeakers, covering more than 100 years of development from the earliest uses of horns and horn-loaded transducers, It draws upon years of painstaking original research by the authors, both native Norwegians.

Bjørn Kolbrek earned a Ph.D. from the Norwegian University of Science and Technology (NTNU) in Trondheim. He is an engineer for Celestion, and has since researched and developed horn simulation software. His passion for audio and electronics extending back to childhood interests in radar and ham radio, Kolbrek does much of the heavy lifting in the theory and design sections of the book.

“High-Quality Horn Loudspeaker Systems” authors Bjørn Kolbrek (right) and Thomas Dunker.

Thomas Dunker is a lifelong audio enthusiast who operated a website about horn loudspeakers in the 1990s and has studied the subject for more than 25 years. His contributions are centered in the history section of the book, and like Kolbrek, he is an avid audio experimenter and do-it-yourselfer.

Originally meeting via email in 2004, Kolbrek and Dunker have collaborated on horn research ever since. At the 2019 Audio Engineering Society convention in New York, they co-presented a session about the origins of compression drivers. Kolbrek’s father, Reidar Kolbrek, created the illustrations for the book.

Go here to view the table of contents and read a personal statement from the authors of High-Quality Horn Loudspeaker Systems. Again, the book is available here via Parts Express in the U.S. and here via Lean Business Audio in the U.K.


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