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The subscriber loudspeaker "Orbit AG-301" since 2000 has been produced by OJSC Moscow Plant Orbit. '' Orbit AG-301 '' is designed to reproduce the low-frequency channel transmissions of the wired radio network. AG was produced in 2 versions: for broadcasting networks with a voltage of 15 volts for Moscow and for radio networks with a voltage of 30 volts for the rest of Russia. The effective working range of the sound is 160 ... 6300 Hz. The average sound pressure in the range of 315 ... 4000 Hz - 0.25 Pa. 35 db volume control range. Dimensions 160x115x206 mm. Weight 0.8 kg.