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Since 1986, the radio constructor "Universal 2-channel noise suppressor" has been manufactured by Kamenets-Podolsk Electropribor Plant. The designer makes it possible to assemble a universal two-channel noise suppressor from radio components on a printed circuit board, designed to work in the paths of high-quality stereo sound reproducing devices. The working range of sound frequencies is 20 ... 20000 Hz. The rated input voltage is 0.25 V. The supply voltage is 12 ... 15 V. The input resistance is 30 kΩ. The transfer coefficient is 1. The harmonic ratio at the output is 0.5%. 10 dB noise reduction. Transient attenuation between 40 dB channels. Current consumption 20 mA. Dimensions of the board are 95x170x50 mm. Weight 150 gr.