Subscriber loudspeaker "Siberia".

Subscriber loudspeakers.DomesticSince 1951, the subscriber loudspeaker "Siberia" has been produced by the Tomsk Plant of Measuring Equipment. The loudspeaker is intended for sounding radio programs transmitted over local radio broadcasting radio networks. The voltage in the radio network is 30 volts. Power input 0.25 W. The frequency range is 150 ... 5000 Hz. Uneven frequency response - 20 dB. Average sound pressure 1.5 bar. Harmonic distortion 7%. Dimensions AG - 210x170x80 mm. Weight 1.1 kg. The loudspeaker was produced in several design options. The first is the main one - the first row of photographs, the second with radio fabric and the third - in a rectangular design. In 1952, the AG in its latest design was renamed "North".