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SHOWCASE 14

1920s: The Times of Crystal Sets and… Integrated Circuits

Headphones for Crystal Sets

5 - RN - 1,000 Ohm headphones. Manufacturer unknown (there is RLT logotype though). 

6 - Headphones made by Hagenuk Kiel, Germany. Impedance 2,000 Ohm

7 - IDEAL - Headphones made by Blaupunkt, Germany. Impedance 4,000 Ohm

8 - TRIMM FEATHERWEIGHT - 4,800 Ohm headphones made by Trimm, Inc., Chicago, USA.

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