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Amplifier switching device "Helios-001-stereo" since 1986 produced the Kazan factory of writing devices. UCU of the highest complexity group provides amplification of music or speech programs and allows you to voice medium-sized concert halls. UCU consists of a preamplifier with a mixing console for eight inputs; two-channel ULF block, with 12-band timbre; two speakers "Helios-100". UCU provides for: indication of overload in case of short circuit, overheating; octave graphic equalizer for frequencies 16; 31; 62; 125; 250; 600 Hz; one; 2; four; eight; sixteen; 30 kHz; LED level indicator; mixing console, stereo phone jack, eight-channel switch; buttons for each of the 8 channels; tweeter control treble and woofer, volume and reverb signal; the ability to connect sources of programs and select any of them by switching; switching modes psevdokvadro, stereo, mono, speaker switching phasing UCU housing made of metal and lined with artificial leather. Rated output power 2x100 watts. The audio frequency range is 20 ... 20000 Hz. THD 0.3%. Sensitivity of inputs: high-resistance 775 mV, medium-resistance 245 mV, microphone 10 mV. Signal to noise ratio of 70 dB. LF Tone Adjustment Range ± 12, HF ± 12 dB. AC impedance 4 ohms. Power consumption 510 watts. Dimensions: preamplifier 490x440x160 mm, uM with a tone-block 490x400x160 mm, AC 1174x557x440 mm. Weight 12, 22 and 52 kg.