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Dynamic microphone "MD-42" allegedly since 1955 produced Tula factory "Octava". Designed for home recording. The operating frequency range is 100 ... 5000 Hz. Irregularity of the frequency response - 12 dB. Output resistance is 250 ohms. The level of axial sensitivity of -72 dB. The usual sensitivity level is 1.25 mV. Undirected. The dimensions of the microphone are 120x70x50 mm. Weight 530 gr.