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Since 1982, the active acoustic system "25AS-311" has been produced by the Tallinn Punane-RET plant. Designed for high-quality sound reproduction as part of the stereo radio set '' Estonia-009C ''. The AAS has a power amplifier, a filter dividing the frequency spectrum into three bands, each of which is reproduced by different loudspeakers. There is an autonomous power supply. In the new AAS, the grids were covered with a paralon from above. Frequency range 40 ... 18000 Hz. Uneven frequency response 14 dB. The rated output power of the built-in amplifier is 25 watts. Used speakers: LF: 25GD-26B, MF: 15GD-11A, HF: 3GD-31. The harmonic coefficient of the amplifier is 0.2%. The power consumption of 65 watts from the network. AC dimensions - 540x315x330 mm. Weight 19 kg.
Based on information from collection of Valery Khartchenko