Amplion loudspeaker with wooden horn, 1925.
4 0 c m
 
29cm
actual image size: 21cm x 32cm

Amplion loudspeaker with wooden horn, 1925.

© Science Museum / Science & Society Picture Library

Description

Before modern moving-coil loudspeakers, most people listened to the radio on headphones. A speaker, if you had one, would probably have fixed coils driving an iron reed attached to a small diaphragm.
 

Image Ref.

10305615
 

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