N-23-1S (Vega) 1990
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The stereo phones "Vega H-23" and "Vega H-23-1C" were produced by Berd software "Vega", respectively, since 1987 and 1990. Phones are designed for individual high-quality listening to musical phonograms from mono and stereo consumer radio equipment. The range of working playback frequencies is 20 ... 20000 Hz. 32 ohm impedance. Nominal input power 1 mW, maximum 150 mW. Mass phones 60 gr.
Documentation:
Information from collection of Valery Khartchenko