Loudspeaker `` GR-D ''.
Acoustic systems, passive or active, as well as electro-acoustic units, hearing aids, electric megaphones, intercoms ...Broadcast loudspeakersSince 1950, the GR-D loudspeaker has been produced by the Oktava plant in Tula. Loudspeaker "GR-D" is designed for installation in all types of public transport, trains, buses, dispatch rooms, railway stations, ships, etc. The loudspeaker has a matching transformer, with multiple terminals, thanks to which it can be used in any transmission lines with a power from 10 W to 1 kW and with a voltage from 15 to 120 volts.
