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Since 1987, active loudspeakers "Amfiton" produced Ivano-Frankivsk software "Karpaty". AAS are designed to amplify audio signals from wearable stereo cassette players, as well as from any other portable or stationary mono and stereo sources. In addition to the audio signal input from the tape recorder, each speaker has a connector for connecting an external power source, as well as a connector for direct use of the loudspeaker, while the average input power can be 3W. Loudspeakers '' 3GSH-2-8-140 '' are used in AAC. Initially, the AAS were performed completely on the chips, later on the chips and transistors. Specifications AAS: The range of reproducible sound frequencies - 160 ... 20000 Hz. The total harmonic coefficient of not more than 3%. The rated output power is 120 mW. Rated supply voltage 3 V. (316x2). Dimensions of one AAC 112x182x88 mm. The mass of one AAC 0.8 kg.