Broadcast loudspeaker '' 3GD-3MA ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Broadcast loudspeakersThe broadcast loudspeaker "3GD-3MA" was produced presumably since 1952 by the Murom radio plant. The loudspeaker "3GD-3MA" was used in the subway, on sea and river vessels. More details are not yet available.
