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Since 1977, the Proton-301-stereo car reproducing device has been manufactured by the Proton plant in Kharkiv. AVU is designed for installation in cars Zhiguli, Moskvich and Volga. It is designed to reproduce mono and stereo soundtracks from the MK-60 cassettes. The LPM is made on the basis of the LPM of the Sputnik-403 tape recorder, which ensures fast rewinding of the tape in both directions and automatic shutdown of the LPM at the end of the tape in the cassette. In the AVU provides adjustment of volume, tone on the treble, stereo balance, on indication. AVU works on two speakers in each of which is set on the dynamic head 4ГД-8Е. The belt speed is 4.76 cm / s. Play time 2x30 min. Knock factor ± 0.4%. Rated output power - 2x2 watts. The operating frequency range is 63 ... 10000 Hz. The power consumed from the battery is 23 watts. The dimensions of AVU are 225x72x212, AC - 100x148x160. AVU mass - 3 kg, AC - 1 kg. AVU price - 220 rubles.