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Stereo amplifier "Forum U-001-stereo" since 1987 produced the Leningrad Kalinin Plant. The amplifier is intended for high-quality amplification of audio signals from any sources and their reproduction with 2 acoustic systems. The amplifier has: Overload indicators. Filters limit high and low frequencies. Input selector. Switchable loudness. Device protection amplifier against short circuit, overheating and DC output voltage for speakers. Electronic indicators of output power. Built-in corrective amplifier for connecting an electric player. Technical characteristics of UZCH: Nominal output power for connecting speakers with an impedance of 2x100 watts. The nominal range of reproduced frequencies is 20 ... 25000 Hz. The harmonic coefficient of 0.05%. The intermodulation distortion factor is 0.01%. The signal-to-weighted noise ratio for connecting the power amplifier -80 dB. The power consumed from the mains is 330 watts. The dimensions of the amplifier are 440x4200x1450 mm. Weight 17 kg. Since 1988, the plant began production of an upgraded amplifier under the name "Forum 180U-001С".