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Subscriber loudspeaker "Donbass" presumably since 1969 produced Makeevka plant of electrical household goods "Impulse" and another unidentified plant. The loudspeaker is designed to reproduce the radio program of wire broadcast broadcasting, with a voltage in the line of 30 V. The range of reproduced frequencies of sound is 160..5000 Hz. Dimensions of the speaker 260x150x74 mm. Weight 1.1 kg.