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The subscriber loudspeaker "Nevsky" since 1968 let out the Leningrad plant "Plastpribor". Standard AG 3rd class. Voltage 30 V. Power consumption 0.15 W. Input impedance 3600 Ohm. Range of working frequencies is 160 ... 5000 Hz. Dimensions 238x157x100 mm. Weight is 1 kg.