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Electronic audio prefix "Shoola" has been produced since the beginning of 1981. The prefix is "‹"‹intended for color accompaniment of music programs reproduced by consumer radio equipment having a linear output or an output for connecting an additional loudspeaker. It was produced in wall and desktop versions and could be used the same way as a regular lamp with white, red, green or multi-color luminescence, in which all the listed colors are present in any combination. The brightness of the CPU as a general and each color individually can be smoothly adjusted. Main technical characteristics: Input voltage range 0.2 ... 10 V. Operating frequency range 63 ... 12500 Hz. The consumed CPU power from the electrical network does not exceed 300 watts. Dimensions of color music prefix - 540x280x200 mm. Her weight is 7 kg. Retail price 125 rubles.