
4 0 c m
34cm
actual image size: 26cm x 32cm
Description
Serling Primax loudspeaker, with pleated diaphragm. 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 Details
Image Ref.
10251415
© Science Museum / Science & Society Picture Library