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Sound column "25KZ-20" was produced presumably since 1988 by the Gagarinsky factory "Speaker". The column is designed to sound public spaces. As part of 4 heads 6GDSH-5-40. Range of working frequencies is 160 ... 12500 Hz. Input voltage 30 volts. Dimensions KZ - 700x180x150 mm. Weight - 7.9 kg.