Subscriber loudspeaker "Emerald".
Subscriber loudspeakers.DomesticSince the beginning of 1987, the subscriber loudspeaker "Izumrud" has been producing the Novosibirsk plant "Electrosignal". "Izumrud" is a souvenir subscriber loudspeaker designed for operation in radio broadcasting lines of local radio broadcasting with a voltage of 30 volts. The price of AG is 6 rubles.
