M149 TUBE

Switchable Tube Microphone

Overview

The M 149 Switchable Tube Microphone from Neumann is a variable dual-diaphragm microphone. 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 pass filter, allowing very fine adjustment of the cut-off frequency.

Features

Transformerless Tube Output Circuitry

Transformerless 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 K 49 capsule - well known from the legendary U 47 and M 49 microphones - as well as a modern tube and high quality amplifier output stage, the M 149 Tube delivers exceptional signal character and response. A frequency response of 20 Hz to 20 kHz and SPL rating of 136 dB < 5% THD result in pristine audio reproduction at various dynamic range.

9 Selectable Polar Patterns

Omnidirectional, wide angle cardioid, cardioid, hypercardioid and figure 8 polar patterns are provided. Intermediate positions of each are located in between the pattern designations.

Low Frequency Roll-Off Switch

A 7-position low frequency roll-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 (-3 dB)

Shock Mounted Capsule

The capsule is mounted elastically inside the head to minimize structure borne noise.

EA 170 Shock-Mount

The elastic EA 170 microphone shock-mount is included and even further minimizes noise caused by handling.

Specifications

Analog Performance

Operating PrinciplePressure Gradient

TubeYes

Polar PatternCardioid, Figure-8, Hypercardioid,

Omnidirectional, Wide-Angle Cardioid

Pattern SelectionSwitched

Frequency Range20 Hz to 20 kHz

Signal to Noise Ratio66 dB CCIR

69 dB CCIR

71 dB CCIR

78 dB A-Weighted

81 dB A-Weighted

83 dB A-Weighted

Equivalent Noise Level28 dB CCIR

25 dB CCIR

23 dB CCIR

16 dB A-Weighted

13 dB A-Weighted

11 dB A-Weighted

Maximum SPL120 dB SPL

136 dB SPL

THD0.5%

Impedance50 Ohms

Load Impedance1000 Ohms

Sensitivity34 mV/Pa at 1 kHz into 1 kOhms

47 mV/Pa at 1 kHz into 1 kOhms

62 mV/Pa at 1 kHz into 1 kOhms

General

Output Connectors1 x 3-Pin XLR

Length7.91" / 201 mm

Diameter2.76" / 70 mm

Weight25.75 oz / 730 g

Packaging Info

Package Weight13.4 lb

Box Dimensions (LxWxH)15.9 x 13.9 x 6.6"

What’s In The Box

- Neumann M 149 Switchable Tube Microphone

- Attractive Microphone Case

- N 149 Power Supply with Plug-In Mains Unit

- 8-Core Microphone Connecting Cable

- EA 170 Full Elastic Microphone Suspension

- Dust Cover

- Protective, Wooden Storage Box for All Components