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Since 1985, the 10AC-318 speaker system has been produced by several manufacturers; in the photographs, this is the Mayak plant in Kiev. The speaker is designed to reproduce sound in conjunction with consumer radio equipment of the 2nd difficulty group. Specifications speakers: Effective operating frequency range - 100 ... 16000 Hz. Speaker sensitivity - 90 dB. Irregularity of the frequency response - 16 dB. The average sound pressure is 0.8 Pa. Harmonic coefficient 3 ... 6%. Electrical resistance 4 ohm. The maximum noise power of 10 watts. Long-term power 15 watts. The maximum short-term power of 20 watts. The frequency of the main resonance is 40 Hz. Some plants produced loudspeakers with lower characteristics in the range of reproducible frequencies.