Subscriber loudspeaker `` EMZ ''.
Subscriber loudspeakers.DomesticSince 1957, the subscriber loudspeaker "EMZ" has been produced by the Moscow Electromechanical Plant. Subscriber loudspeaker "EMZ" of 0.25GD-III-2 type, later 0.25GD-III-3 is intended for operation in a broadcast radio network with a voltage of 30 volts. The audio frequency band is 150 ... 5000 Hz. For Moscow, the loudspeaker was produced for a voltage of 15 volts.
