FIELD: radio engineering, design of monophonic and stereophonic sound recording and play back equipment used by individual User under conditions of specially unadopted room. SUBSTANCE: system incorporates signal source, device regulating amplitude-frequency characteristic, low-frequency amplifier, loudspeaker coupled in series and volume control, probing device, device automatically controlling amplitude-frequency characteristic, communication line. Output of probing device is connected with the aid of communication line to first input of device automatically controlling amplitude-frequency characteristic. Probing device is installed in listening point. Second input of device automatically controlling amplitude-frequency characteristic is coupled to output of signal source through device regulating amplitude-frequency characteristic. Output of device automatically controlling amplitude-frequency characteristic is connected to input of low-frequency amplifier. Probing device and communication line have capability to control gain factor and volume level in listening point. EFFECT: increased operational characteristics. 7 cl, 2 dwg
