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

SEAS drivers


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 Norwegian 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 formed 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

2003 Cooperation with Tandberg starts, where SEAS assembles speaker systems for Tandberg Video Conference Systems

2011 SEAS enters the AV/video conferencing/meeting room speaker market with SEAS branded products

2012 SEAS becomes supplier of loudspeakers to NEC Video Conference Systems

2014 SEAS joins the Sonavox Group, and are able to provide sound solutions using high-end amplification and streaming technology

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 designed and 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

2007 SEAS launched the EXOTIC line of products, initially with an 8 inch fullrange

2008 SEAS introduced the X3-06 (T35 EXOTIC) tweeter which is a modern high-performance large-dome (35 mm) tweeter, at the same time celebrating 40 years of SEAS soft domes

2008 SEAS introduced the CURV cone series of woofers

2009 SEAS introduced the E0051-04/06 (C16N001/F) coax in the Excel series with cast magnesium cone

2009 SEAS launched the DESIGN line of products, with two subwoofers and a passive radiator

2010 SEAS launched the FU10RB for use in high-end video conference systems

2013 SEAS developed and launched the E0100-04 White Diamond tweeter

2014 SEAS developed and launched the E0058-06 Berylium tweeter

2018 SEAS became part of the Merry Electronics Co., LTD

2019 SEAS introduced the Excel Graphene product line of woofers with Graphene treated magnesium cones.