Condenser microphone `` MK-12 ''.Microphones.MicrophonesCondenser microphone "MK-12" was produced presumably since 1972 by the Tula plant "Oktava". Microphone MK-12 unidirectional. The range of perceived frequencies is 50 ... 15000 Hz. Designed for the needs of radio broadcasting, television and professional sound recording. It was released in a small series.