Neumann M 149 Tube Condenser Microphone
The M 149 Tube is a variable dual-diaphragm condenser microphone, designed to be the flagship of any and all recording studios. The polar pattern switch selects one of nine directional patterns: omni-directional, wide-angle-cardioid, cardioid, hyper-cardioid, figure-8, and one additional intermediate pattern between each major position. 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 transformer-less 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 very open head-grille. The switch at the front allows selection one of nine directional patterns, making this microphone an ideal choice for a wide range of recording situations. As its ancestors, the M 149 Tube is a superb vocalist microphone, not only because of the capsule, but also due to its modern circuitry, characterized by extremely low noise level. The slide switch at the rear operates a seven-step high pass filter. It allows a very fine adjustment of the cut-off frequency. The M 149 Tube is addressed from the front, marked with the Neumann logo. The capsule is mounted elastically inside the head-grille to eliminate structure borne noise. The surface below the capsule is shaped like a cone to disperse any reflected sound from the acoustic upper half space. This avoids any interference with the primary sound arriving at the capsule directly.
The circuit of the M 149 Tube microphone has been developed to exceed traditional designs. Neumann selected a modern tube (triode) and combined its exceptional transmission characteristics with the advantages of our proven transformer-less output circuit. The aim was to provide a more controlled environment for the audio signal on its path from the capsule to the output section. The final stage is an integrated amplifier, especially designed for such applications. It features very low distortion (THD < 0.002 % at ± 10 V), very low self-noise, and high output current capability. As a result, the tube circuit is completely decoupled from the microphone output and its characteristic response curve will be unaffected by very high signal levels or varying load conditions. The lower output impedance and higher output current capability allow cable lengths up to 300 m (1000 feet) without any degradation of the audio signal. The tube amplifier changes the high impedance of the capsule and adds 10 dB of gain to the audio signal, providing optimum operating specifications. The wide dynamic range is impressive, as peak output can be ±10 V, at 20 mA. The ideal operating point of the tube is maintained throughout its entire life expectancy. Plate current and filament voltage are constantly regulated. A sensor circuit monitors and compensates for any voltage drop across the microphone cable. The tube is heated up slowly through inverse current limiting to guarantee long life. Optimum operating conditions are reached within a very short time.
The specifically designed N 149 A Power Supply unit feeds the M 149 Tube through an 8-core cable. The output connector for the audio signal is a 3-pin XLR. The output signal is balanced. The microphone comes as a set in an attractive aluminum case, together with the 8-core microphone connecting cable, the N 149 A Power Supply with plug-in mains unit, the EA 170 full elastic microphone suspension and a dust cover.
The universal high-end Neumann M 149 Tube microphone with a unique sound and a comprehensive selection of settings, including 9 directional characteristics and a 7-level low-cut filter! The capsule is derived from that of the legendary U 47 and M 49.
(1) Universal tube mic.
(2) Its warm and yet transparent sound gives volume and presence to a vocalist.
(3) A wide range of adjustments provide the most subtle differentiation of sound, especially in the range of proximity effect.
(4) Mic for broadcasting, dubbing, and voice-over.
(5) Spot mic for close miking of solo instruments, especially strings, wind instruments, and piano.
(6) These are just some of the most common applications. We recommend additional experimentation to gain maximum use from this microphone.
What's In the Box?
Neumann M 149 Switchable Tube Microphone
N 149 Power Supply with Plug-In
8-Core Microphone Connecting Cable
EA 170 Full Elastic Microphone Suspension
Protective, Wooden Storage Box
Limited 1-Year Warranty
Official Neumann Literature
Acoustical Operating Principle: Pressure gradient transducer
Directional Pattern: Omnidirectional, wide angle cardioid, cardioid, hyper-cardioid, figure-8 plus one intermediate position each.
Frequency Range: 20 Hz to 20 kHz
Sensitivity at 1 kHz into 1 kohm: 34/47/62 mV/Pa
Rated Impedance: 50 ohms
Rated Load Impedance: 1 kohms
Equivalent Noise Level, CCIR: 28/25/23 dB
Equivalent Noise Level, A-weighted: 16/13/11 dB-A
Signal-to-Noise Ratio, CCIR (rel. 94 dB SPL): 66/69/71 dB
Signal-to-Noise Ratio, A-weighted1) (rel. 94 dB SPL): 78/81/83 dB
Typical SPL (Tube Characteristic): K < 0,5 %: 120 dB, K < 5 %: 136 dB
Maximum Output Voltage: 18 dBu
Powering Power Supply: N 149 A
Matching Connector Microphone: DIN 8F, Power Supply: XLR3F
Weight: 730 g
Diameter: 70 mm
Length: 201 mm