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Since the beginning of 1991, the Soyuz subscriber loudspeaker has been producing the Saransk Instrument-Making Plant named after 60th anniversary of the USSR. The small-sized souvenir subscriber loudspeaker `` Soyuz '' is intended for reproduction of radio broadcasts of the low-frequency channel of the wire broadcasting network with a voltage of 30 volts. The volume control range is 32 dB. The rated output power is 0.05 watts. The weight of the speaker is 0.3 kg.