TDS-4 (Start) 1985
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Head stereo phones "Start TDS-4" since 1985 produced the Leningrad plant of precision electromechanical devices. Stereo telephones are designed for high-quality listening of phonograms from household radio equipment. The operating frequency range is 20 ... 20.000 Hz. Passport power 0.5 watts. The electrical resistance module is 16 ohms. Weight 500 gr. Price 16 rubles.
Documentation:
Information from collection of Valery Khartchenko