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Acoustic system "25AS-309" was produced since 1982 by the Berd Radio Plant. The 3-band closed-type loudspeaker '' 25 AC-309 '' is designed to work with household high-quality amplifying radio equipment. Rated power AC - 25 watts. The average sound pressure is 1.2 Pa. Rated electrical resistance of 4 ohms. Frequency range 40 ... 20000 Hz. Dimensions of one speaker - 480x285x261 mm. AU weight - 13 kg. The price of one speaker is 110 rubles. Since the autumn of 1984, the plant produced a similar acoustic system of the type "25AS-109" renamed according to GOST 23262-83.
Based on information from collection of Valery Khartchenko