Brown horn loudspeaker: Crystavox
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Small horn loudspeaker with electromagnetic amplifier. Electromagnet fec by signal actuates small carbon granule microphone connected to speaker coil via 6v external battery. Patents 191228-11 and 29833-10. S.G. Brown Ltd.
Details
- Category:
- Cinematography
- Collection:
- Kodak Collection
- Object Number:
- 1990-5036/3494
- Materials:
- metal
- type:
- loudspeaker
- credit:
- The Kodak Collection at the National Media Museum, Bradford
