Neumann RSM 191


Neumann RSM 191


The RSM 191 is a stereo microphone system consisting of the microphone and the MTX 191 A matrix amplifier. It has an adjustable pick-up angle and high directivity. The microphone has two separate capsule systems, a hypercardioid element and a figure-8, both in a short shotgun. Together they generate the mid and the side signals. 

The matrix amplifier controls the width of the stereo image by changing the gain of the side signal relative to the middle signal in six 3 dB steps. The output signals of the matrix amplifier are either mid-side (MS) or left/right (XY). The signals are converted through transformerless sum-and-difference circuitry. 

The balanced, transformerless technology permits the use of long cables between the microphone, the matrix amplifier and the following mic input of other signal processing equipment.

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  • Type: Condenser
  • Polar Pattern: Mid - Lobe-shaped, Side - Figure-8
  • Power: 2x +48V DC for each line or 9V battery with matrix box
  • Frequency Response: 20 - 20,000 Hz
  • Impedance: 50 Ω
  • Sensitivity: 23 mV/Pa
  • Max SPL: 134 dB
  • Self Noise: Mid - 16dB, Side - 22dB (A-weighted)
  • Connector: 5 pin XLR