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Since the beginning of 1990, the subscriber loudspeaker Orpheus AG-311 has produced the Leningrad association Plastpribor. Subscriber loudspeaker is designed to reproduce the local low-frequency broadcasting channel transmitted via a broadcasting line. The range of sound reproduced frequencies is 160 ... 10000 Hz. The input voltage is 30 (15) V. The input power is 0.25 W. Dimensions AG - 215h48h146. Weight is 860 grams.