File:The first prototype loudspeaker.png

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The_first_prototype_loudspeaker.png ‎(792 × 422 pixels, file size: 518 KB, MIME type: image/png)

Summary

Description
English: This prototype is finished in May 1921. The speaker cone is damaged. The cabinet also contains a power amplification system.
Date 7 April 2021(2021-04-07)
File source https://edisontechcenter.org/speakers.html#timeline
Author Edison Tech Center Copyright 2011-2015

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Permission is granted to copy, distribute and/or modify this document according to the terms in Creative Commons License, Attribution-ShareAlike 4.0. The full text of this license may be found here: CC by-sa 4.0
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Date/TimeThumbnailDimensionsUserComment
current19:00, 7 April 2021Thumbnail for version as of 19:00, 7 April 2021792 × 422 (518 KB)DuongVuTrieu (talk | contribs)Uploaded a work by Edison Tech Center Copyright 2011-2015 from https://edisontechcenter.org/speakers.html#timeline with UploadWizard

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