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The electronic network transistor "Electronics EF-017-stereo" since 1985 was produced by Kazan Scientific-Production Association "Elecon". Electrophone "Electronics EF-017S" is designed for high-quality playback of recordings from mono and stereo records. The electrophone consists of the electric player EP Electronics-017S, the full amplifier "Electronic 50U-017С" AF and two speakers type 35AC-215. Lightweight turnaround turntable and magnetic head type GZM-043 with increased flexibility of the moving system, reduces the wear of records. Dynamic damping of the main resonance of the tonearm allows you to play even warped records without noticeable deterioration. The player used quartz stabilization of the frequency of rotation of the disk, regulators of the presser and anti-skating forces. The amplifier is equipped with a relay protection system overload and short circuit in the load. Electric allows you to work immediately two pairs of speakers, any of which can be turned off. Characteristics of EP: The range of reproducible frequencies - 20 ... 20000 Hz Knock factor - 0.1%. The level of roar -66 dB. Pickup force pickup 7.5 ... 12.5 mN. Overall dimensions 400x120x340 mm. Weight 10 kg. Characteristics UZCH: Nominal output power of each channel 50 watts. The nominal range of reproduced sound frequencies is 20 ... 25000 Hz. THD 0.1%. The background level is -60 dB. Dimensions of EF - 400x120x375 mm. Weight 15 kg. Acoustic system characteristics: Phase-invertor with a passive diffuser. Rated power 35 watts. 4 ohm impedance. The frequency range of 31.5 ... 20000 Hz. Dimensions of one speaker - 365x685x305 mm. Weight 27 kg.