'Sterling-Primax' pleated diaphragm loudspeaker.

'Sterling-Primax' pleated diaphragm loudspeaker.
Science Museum Group
© The Board of Trustees of the Science Musuem

The main feature of this loudspeaker is its pleated diaphragm. This was introduced by Lumiere in 1908. The moving-iron unit that drives the paper diaphragm has been sectioned to show its workings in great detail.

Details

Category:: Radio Communication

Object Number:: 1933-463

type:: loudspeaker

credit:: Major Osborne Wills

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'Sterling-Primax' pleated diaphragm loudspeaker.

Details

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