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Magnavox Telemegaphone Combinal Set At Musical Industry Museum Editorial Photo


Magnavox Telemegaphone Combinal Set At Musical Industry Museum Editorial Stock Photo
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Title
Magnavox Telemegaphone Combinal Set At Musical Industry Museum #157854215
Description

Prior to speakers, this acoustic horn was used to reproduce sound. A vacuum tube increased voltage to create a vibration in a thin metal diaphragm at the horns base.

This image is editorial