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The transistor "Vega EF-112-stereo" network transponder since the beginning of 1985 has been producing the Berd Radio Plant. The stereo microphone of the first complexity group "Vega EF-112-stereo" is intended for high-quality reproduction of recordings from records of all formats. The microphone has a built-in 5-band equalizer, switchable low, mid and high frequency filters, switchable loudspeaker, light indication of overload. Rated output power of the amplifier 2x20 W, long-term maximum 40 watts. The effective frequency range of the sound of the amplifier voltage is 20 ... 25000 Hz. The frequency range of the sound pressure speaker is 40 ... 25000 Hz. The effective frequency range in the recording channel is 20 ... 18000 Hz. Harmonic ULF distortion - 0.05%. The signal-to-weighted noise ratio is 88 dB. The detonation coefficient is 0.13%. Electrophone dimensions 430x400x160 mm. Weight 8 kg. AU weight 15.6 kg. Until 1987, the phone was called the "Vega-112-stereo".