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Color-musical blocks "Ilga-Spectrum", "Ilga-Spectrum-1" and "Ilga-Spectrum-2" were supposedly produced since 1991 by the Irkutsk Production Association "Vostok" (Irkutsk Radio Receivers Plant).
Blocks are designed for light and color dynamic accompaniment of music programs.
The number of main channels - 3. Maximum power consumption - 60 watts.
Dimensions of the device - 324x450x108 mm.
Weight - 5.5 kg.
The blocks differed from each other by colored or simple bulbs and different transparent and color light diffusers.
Other differences have not yet been established.