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Stereo amplifier "Electron-103 stereo" since 1974 produced the Murom plant of radio measuring devices. Amplifier "Electron-103-stereo" is an upgrade of the model "Electron-20". The modernization concerned the external design of the amplifier, the final stage, the acoustic systems, as well as the operational capabilities. The amplifier introduced tone control on the treble and bass, the possibility of simultaneous work with multiple sources of programs. Maximum output power increased to 30 watts. The end stage is protected against short circuits. In each of the open-type speakers, two low-frequency loudspeakers of the type 4ГД-35-2, 4ГД-8Е and high-frequency type 3GГ-31 are placed. The band of operating frequencies of the amplifier according to electrical voltage is 30 ... 30000 Hz, and according to sound pressure with complete speakers - 80 ... 13000 Hz. Nonlinear distortion factor of 1%. The external dimensions of the amplifier are 425x295x148 mm, one speaker - 375x162x517 mm. The weight of the amplifier is 12 kg, each speaker is 7 kg. The price of a set of amplifier and two acoustic systems is 260 rubles.