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Jensen ad for Alnico 5 speakers·Jensen Radio Manufacturing Co. (1945 advertisement)·Public domainWhy it mattered
- 01
Dropping the field-coil supply made dynamic loudspeakers smaller, cheaper and easier to deploy away from a wired studio or theatre, which mattered for portable PA.
- 02
It continued the moving-coil line Peter Jensen began with the Magnavox Telemegafone.
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Engineering record
- Introduction
- First permanent-magnet dynamic loudspeaker, introduced by Jensen in 1930[1]
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