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Since 1975, the Brig-001-stereo amplifying switching device was produced by the Leningrad association Oceanpribor and the Kirovsky plant Ladoga. UCU '' Brig-001-stereo '', later '' Brig U-001-stereo '' is intended for high-quality amplification of music and speech programs from a microphone, magnetic or piezoelectric pickup, tuner, tape recorder and other sources of signals. UCU has stepwise volume and tone control, the ability to change the frequency response using high and low frequency filters, there is a soft switch on system that prevents clicks when turned on or off, protection against short circuit in the load, light indication of the network, channel overload. Four loudspeakers with resistance from 4 to 8 ohms and stereo telephones can be connected to UCU. UCU has a low noise level, low distortion, linear frequency response. Rated output power at a load of 8 ohms, 2x50 watts. The operating frequency range is 20 ... 25.000 Hz. Harmonic factor 0.1%. SOI - 0.15%. Channel separation at 1 kHz 50 dB. Signal-to-noise ratio 86 dB. Power consumption 150 watts. UCU dimensions - 452x372x118 mm. Its weight is 15 kg.