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Dynamic microphone "MD-80M" was produced presumably since 1978 by the Tula plant "Octava". The microphone is designed to enhance the speech in the halls with an unfavorable acoustic situation as part of the speaker console. The operating frequency range is 100 ... 15000 Hz. The sensitivity of the free field at a frequency of 1000 Hz, 1.3 mV / Pa. The impedance module is 200 ohms. Overall dimensions 151x44 mm. Weight 110 gr.