The Neumann M 149 Tube Switchable Tube Microphone is a variable dual-diaphragmmicrophone. The K 49 capsule, well known from the legendary U 47 and M 49 microphones, is followed by a tube functioning as an impedance converter. In contrast to earlier concepts utilizing a transformer, the tube is complemented with a transformerless output circuit design. The M 149 Tube can thus feed long microphone cables without any coloration.
Two slide switches are located below the large, acoustically-open headgrille. The switch at the front allows selection one of nine directional patterns. The slide switch at the rear operates a seven-step high passfilter, allowing very fine adjustment of the cut-off frequency.
Transformerless Tube Output Circuitry Transformer-less output circuit, triode tube and integrated amplifier provide a signal output stage featuring very low self noise and distortion. The final output stage is an integrated amplifier that provides a very high output signal and the frequency response curve is unaffected by high, transient signal levels resulting in warm, transparent signal reproduction.
Exceptional Signal Reproduction Utilizing the legendary K49 capsule - well known from the legendary U47 and M49 microphones - as well as a modern tube and high quality amplifier output stage, the M149 Tube delivers exceptional signal character and response. A frequency response of 20Hz to 20kHz and SPL rating of 136dB < 5%THD result in pristine audio reproduction at various dynamic range.
9 Selectable Polar Patterns Omnidirectional, wide angle cardioid, cardioid, hypercardioid and figure 8polar patterns are provided. Intermediate positions of each are located in between the pattern designations.
Low FrequencyRoll-Off Switch A 7-position low frequencyroll-off switch is located at the rear of the microphone. It selects a high-pass filter, advancing in half-octave steps between 20 Hz and 160 Hz (-3dB)
Shock Mounted Capsule The capsule is mounted elastically inside the head to minimize structure borne noise.
EA170 Shock-Mount The elastic EA170 microphoneshock-mount is included and even further minimizes noise caused by handling.
Transducer: Pressure Gradient Condenser
Polar Pattern: Omnidirectional, Wide Angle Cardioid, Cardioid, Hpercardioid, Figure-8, and One Intermediate Position Each
Frequency Response: 20 Hz - 20 kHz
Dynamic Range (Typical): DIN/IEC 651 for < 0,5% THD (for < 5% THD)= 101 (121) dB
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