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The color organ "Oreol" has been produced since 1990 by the Boyarsky Iskra Machine-Building Plant. Color organ device '' Aura '' is intended for color accompaniment of musical or speech sound phonograms. A color organ device (CMU) operates on the principle of spectral separation of sound frequencies and has three main channels, these are: red, blue, green, and background yellow. Power is supplied from the 220 V electrical network; power consumption at peak reaches 300 W. The rated voltage of the sound signal at the input of the CMU must be 0.2 V. In each channel of the CMU, in addition to the background, there are level controls. Dimensions of color music device 830x240x130 mm. Weight 8 kg. Price 90 rubles.