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Since 1985, the acoustic system "15AS-204" was produced by the Novosibirsk Plant of Precision Engineering. Designed for use as remote systems for high-quality reproduction of sound phonograms. 2-way closed-circuit speakers. The frequency range is 63 ... 20000 Hz. Irregularity of the frequency response - 15 dB. Sensitivity 87 dB. The average sound pressure is 0.15 Pa. 4 ohm impedance. Rated power 15, passport 25 watts. Dimensions 400x250x190 mm. Weight 8 kg. AU on design and construction is similar to the same AU "15AS-204", but only the Berdsk radio plant, produced since 1983.