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The Mono-25-2 reinforcement kit has been manufactured since 1971 by the Mihailograd Electroacoustics plant in Bulgaria. The kit is listed on the site because it was supplied to the USSR in significant quantities, 90% assembled from domestic radio elements, with signatures and descriptions in Russian. The Mono-25-2 amplifier set is a high-quality tube amplifier designed to work in instrumental ensembles for the sound of rooms, summer pop stations or small open spaces. The kit consists of two identical boxes, each box contains the amplifier itself and the associated equipment, such as microphones, racks, cables, etc. Ie in the kit are two Mono-25-2 amplifiers. Technical characteristics: Range of amplified sound frequencies 20 ... 20000 Hz. The coefficient of nonlinear distortion does not exceed at rated power 2%. The level of self-noise -52 dB. Rated output power 25 watts, maximum 34 watts. The power consumed from the electrical network is up to 150 VA. Dimensions of the amplifier 137Ñ…280Ñ…410 mm. Weight 13 kg.