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Acoustic system "3ÐС-303" was produced presumably since 1981 by Vilnius instrument-making plant "Vilma". Broadband speakers are designed for picking consumer radio equipment of 3-4 classes and contain one ZGD-45 loudspeaker each. Specifications: Frequency range: 100 ... 10000 Hz. Sensitivity: 90 dB. Rated power: 3 watts. Passport power: 5 watts. Resistance: 4 Ohms. Dimensions AC: 375h255h185 mm. Mass AU: 5 kg.