Radioconstructor `` Start-2600 '' (Quadro converter).
Radio and electrical constructors, sets.Audio AmplifiersThe radioconstructor "Start-2600" (Quadro Converter) has been produced since 1979. The radio constructor contains a complete functional structure and is designed to convert a two-channel stereo signal into an additional third channel, which improves the stereo perception of sound, allowing you to obtain additional spatial information with various effects.
