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Stereophones "TDS-1" from 1974 produced Lviv PO them. 50th anniversary of October. Phones "TDS-1" are intended for high-quality listening of mono and stereophonic soundtracks from home audio equipment. Electrical resistance module 8 ... 16 ohms. The range of reproducible sound frequencies 40 ... 16000 Hz. Rated power input 1 mW, maximum 0.5 watts. The price of the retail model is 20 rubles.