From Neumann, the RSM 191 A-S is a professional stereo shotgun microphone system designed for crucial recording and live sound reinforcement applications. The system consists of the RSM 191 microphone and MTX 191 matrix amplifier. The revolutionary design of the RSM 191 begins with it's dual capsule system. A hypercardioid element and a figure-8 element exist in a short shotgun housing. Together the capsules generate the mid and side signals necessary to achieve either M-S or X-Y style capturing.
The MTX191 matrix amplifier is the control center, output stage and power supply for the microphone. The MTX191 features controls to adjust the width of the stereo image by adjusting the side signal gain. The controls may be used to widen a stereo perspective or create a focused, narrow pick up with exceptional attenuation of residual off-axis noise. The output stage features dual (stereo) 3-pin XLR outputs. The MTX191 is capable of +48 V phantom power via an external source or internal 9-volt battery (8 hours typical).
Neumann's dedication to excellence is apparent in the overall sound quality of the RSM 191 A-S. As a stereo microphone the imaging and detail is reproduced with stunning accuracy in either M-S or X-Y configurations. As a shotgun, the focused pick up pattern provides an off-axis rejection that rivals dedicated shotguns in the same price range. The RSM 191 AS is a formidable choice for film, television, Electronic News Gathering (ENG), orchestra capturing, ambiance capturing and more.
| Transducer |
Mid: Pressure Gradient / Interference Transducer
Side: Pressure Gradient Transducer |
| Polar Pattern |
Mid: Lobe-Shaped
Side: Figure-8 |
| Frequency Response | 20Hz to 20kHz |
| Dynamic Range (Typical) | not specified by manufacturer |
| Signal-to-Noise Ratio |
CCIR 468-3: M/S 69/63dB
DIN/IEC 651: M/S 78/72dB |
| Maximum Input Sound Level |
for THD 0.5%
134dB 144dB with preattenuation |
| Power Requirements |
Supply voltage: 2 x 48V Phantom +/- 4 V
Supplied via external source or single 9-Volt battery 8 hours Current consumption: 2 x 1.9 mA |
| Output Impedance |
Rated impedance: 50 ohms
Rated load impedance: 1000 ohms |
| Output Connectors | 2 x XLR 3-pin Female |
| Pad | No |
| Low Frequency Roll-Off | No |
| Dimensions | 8.35 x 1.18" (212 x 30mm) (Length x Diameter) |
| Weight | 5.97 oz (170 g) |