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Jensen and Pridham moved from Napa in 1916, and changed the company name in 1917 to the Magnavox Company. Jensen was employed as chief engineer until 1925. [6] He built with Edwin S. Pridham the first moving coil loudspeaker in 1915. [7] Called the moving coil principle, the electro-dynamic principle from which the term dynamic speaker later ...
Jensen is a consumer electronics brand with a history that dates back to 1915 with Peter L. Jensen's invention of the first loudspeaker. Over the years the Jensen family of brands has grown to include Jensen, Advent, Acoustic Research (AR), Phase Linear and NHT Loudspeakers (Now Hear This) in the United States and Magnat and Macaudio in Germany.
The former Jensen Radio Manufacturing Company was founded in 1927 by Peter Laurits Jensen, the co-inventor of the first loudspeaker, in Chicago, Illinois.The company gained popularity in its early years, rising to its peak in the mid 1940s when Jensen speakers were selected to be used in the first production of a guitar amplifier by Fender Musical Instruments Corporation.
This system has a characteristic mass and stiffness, and a resonant frequency at which the system will vibrate freely. This frequency is known as the free-space resonance of the loudspeaker and is designated by F s. At this frequency, the voice coil is vibrating in the speaker's magnetic field with maximum peak-to-peak amplitude and velocity.
The electroacoustic mechanism most widely used in speakers to convert the electric current to sound waves is the dynamic or electrodynamic driver, invented in 1925 by Edward W. Kellogg and Chester W. Rice, which creates sound with a coil of wire called a voice coil suspended between the poles of a magnet.
The term loudspeaker may refer to individual transducers (also known as drivers) or to complete speaker systems consisting of an enclosure and one or more drivers.. To adequately and accurately reproduce a wide range of frequencies with even coverage, most loudspeaker systems employ more than one driver, particularly for higher sound pressure level (SPL) or maximum accuracy.
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The backbone of the Bozak line was the B-302A system, offered in several cabinet styles over a period of years. The 302A systems consisted of one 12" woofer, one midrange driver and one tweeter pair. A 'starter' version, the B-300, was a 2-way system consisting of one 12" woofer and one tweeter pair mounted across the front of the woofer.