Soyuz 013 Tube-M, Stereo Pair Small Diaphragm Condenser Tube Microphones, Matched stereo pair, Diaphragm (gold plated): 25 mm, Frequency range: 20 - 20,000 Hz, Polar pattern: Cardioid, Sensitivity: 15 mV/Pa, Impedance: 150 Ohm, Max. sound pressure...
