A History of Innovation and Craftmanship in Loudspeaker Transducer Design through nearly 60 years.

Milestones in SEAS Company History
1948   The owner of Radionette, Jan Wessel decided to start making loudspeaker units for his own production of radio sets. C.C. Nørgaard Madsen was employed as a designer.

1950   Wessel and Madsen decided to separate  the loudspeaker and radio business in order to be able to sell loudspeakers to other radiomanufacturers in Norway and  abroad

1951    The company moved to Moss
1956    Scandinavian Electro Acoustic Systems, or SEAS was formed as a limited company with two shareholders, J. Wessel and C.C. Nørgaard Madsen
1961    Wessel and Nørgaard Madsen bought Videbæk højttalerfabrik from Nørgaard Madsens father
1971    Videbæk højttalerfabrik was made a sister company to SEAS
1974    Both companies experienced a major growth and in 1974 there were 250 employees in Norway and 200 in Denmark
1975    SEAS moved into new and modern premises just outside Moss
1981    After some difficult years, the Danish company managed to break away from SEAS by what the new Norwgian owners regarded as a criminal act. It was named Vifa and became a competitor from one day to the next.

1984    The SEAS employees bought 10% of the shares in the company
1986    The employees fromed a holding company and bought the remaining 90% of the shares.
1997    SEAS won the export price for the Ostfold county
1999    SEAS achieved the AAA rating from D&B

 

Milestones in SEAS Technological History
1925    The first electroacoustic loudspeaker unit in Norway was built at the technical University in Trondheim by Vebjørn Tandberg, who later founded Tandbergs Radiofabrikk.

1948    Radionette established production of loudspeaker units for use in radio sets
1952    The closed and totally shielded TV-magnet system was invented
1968    The first SEAS Hi-Fi 8" and 10" woofers with rubber surround were designedand put into production
1968    One of the very first soft dome tweeters was designed and introduced to the world market

1969    One of the worlds most successful loudspeakers, Dynaco A25 was designed by SEAS engineers. It was based on the 10" Hi-Fi woofer and the     11/2 " dome tweeter.
1970    SEAS started supplying SONY Sweden and later SONY Europe with finished speakers.
1977    A SEAS engineer invented the patented DD-rings as part of the Dynamic Damping concept.
1988    Coaxial drivers with neodymium based dome tweeters were developed by SEAS and KEF without one knowing about the other.
1993    SEAS developed the first commercial loudspeaker unit using a cone made from cast and machined magnesium
1997    The Hexadym magnet system consisting of 6 Neodymium magnets was developed and later patented.
2006    SEAS developed a magnesium diaphragm dome tweeter