Hitachi 1978 Speaker Technology

Hitachi 1978 Speaker Technology
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Gathered Edge Speaker Suspension and Metal Cones were available in 1978, and this article explains a little bit about the technology used in Hitachi loudspeakers. This technology was used in the HS-530 and HS-330 loudspeakers developed by the Hitachi Corporation.

HS-530 and HS-330 Loudspeakers
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