Subscriber loudspeaker Rubin.

Subscriber loudspeakers.DomesticSince the beginning of 1975 the subscriber loudspeaker "Rubin" has been produced by the Gagarin plant "Dinamik". AG is a standard AG for radio transmission lines with a voltage of 30 V. The range of reproducible frequencies in terms of sound pressure is 160 ... 6300 Hz. The average sound pressure in the sound frequency band is 0.25 Pa. The price of AG is 5 rubles. Later the plant changed the name of AG to Zenit-301.