David bogen & co inc.
Bogen RP-235	The company was founded in 1932 in New York by David Bogen and registered as "David Bogen & Co. Inc. " Min. Specialized in radio transmission devices, but their first products were amplifiers and intercoms. At the beginning of the 1950s, Bogen became a well-known supplier of public address systems for schools and amplifiers. In 1956, it was acquired by "Unitronics" based in Long Island, New York. As a result, Bogen's headquarters moved to Paramus, New Jersey. Bogen cooperated with the "Presto" company which has great achievements in the development of sound recording technology. One of the greatest theoretical achievements of Bogen's laboratory was the discovery and research of the so-called "Dumping factor" or the damping factor of the amplifier / loudspeaker system. It was very important in the construction of tube equipment and sound systems. Bogen left behind a large number of HiFi designs, sometimes very similar to Karman-Kardon products. This was because Mr. Harman and Mr. Kardon had been working for Bogen for several years. A characteristic feature of Bogen's amplifiers was the use of 7408 and 7355 power tubes in the amplifiers, and it is difficult to find equipment signed by Bogen and other power tubes. At the same time, Bogen and Harman-Kardon were practically the only significant constructors using the 7355 tubes. Traditionally, these tubes were also driven by the 12AU7 / ECC82. However, there was one element that distinguished Bogen AV receivers from other American manufacturers. It was the use of 6BM8 / ECL82 tubes working in the Push & Pull configuration. The SRB20 model was designed in this way and could therefore compete with the Japanese in the segment of the cheapest equipment. The Bogen company still exists, but it deals in a completely different field of electronics.

   Main page        Previous page        Contact

L.A.2008