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Neumann M 147 Tube
Large Diaphragm Condenser Tube Microphone in Satin Nickel Finish

OUR PART #:  M147-TUBE

Neumann's M 147 Tube is a vacuum tube condenser microphone with cardioid characteristic.
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Our Price: $2,899.95

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Neumann M 147 Tube
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Neumann's M 147 Tube is a vacuum tube condenser microphone with cardioid characteristic. At the heart of this microphone is the K 47 dual diaphragm capsule, inherited from this model's now legendary predecessors, the U 47 and the M 49.

Following the capsule is a tube that functions as an impedance converter. The next stage is an efficient, transformerless output circuit, that guarantees an extremely low self-noise level.

The M 147 Tube can feed extremely long microphone cables without affecting the quality of the audio signal.  Like all Neumann tube microphones, the M 147 Tube comes with an elegant satin nickel finish.

The microphone is delivered as a complete set in a high-quality aluminum case.  Included with the microphone are a microphone cable, a metal swivel mount for a mic stand, and a compact universal power supply for standard mains sockets.

Applications

The famous capsule, together with complimenting tube characteristics, makes the M 147 Tube especially well suited as a vocal microphone.  In addition, it is a superb spot mic for all types of musical instruments.  The extremely low self-noise of its tube circuitry makes the mic perfectly suited for use in modern recording chains, analog and digital.

Acoustic Features

The M 147 Tube is addressed from the side, where the microphone body has the diamond-shaped Neumann company logo.  The black color identifies tube microphones.  The capsule is equivalent to the one used in the U 47, and is the deciding factor in determining the sound characteristic.  It has a flat frequency response to the upper midrange, and a boost of up to 3 dB above 2 kHz.  The headgrille design is a smaller version of the U 47.  It protects the capsule effectively against popping and wind noise.

Polar Pattern

The M147 Tube has a cardioid characteristic, leaning more toward super-cardioid due to its distinctive capsule design.  At higher frequencies the pattern becomes more directional.  This is very similar to the model after which this new tube microphone was patterned, the U 47, and the successor, the U 47 fet.

Electrical Features

When compared to other microphones, the impedance converter used in the M 147 Tube is distinguished by its extremely low self-noise level of only 14 dB-A / 25 dB CCIR weighted.

Similar to the M 149 Tube, the M 147 Tube combines a specifically selected vacuum tube (triode) with modern circuitry.  This technique takes full advantage of the special transfer characteristics of the tube and passes the processed audio signal of the capsule to the microphone output, without any coloration or unwanted side effects.

The tube amplifies the capsule's signal by approximately 10 dB, thus preventing any possible influences from subsequent electronics.  The M 147 Tube delivers a high output voltage, and therefore can feed microphone cables up to 300 m length without signal degradation.

The ideal operating conditions (anode current, heater voltage) of the tube are maintained throughout its life expectancy.  A sensor lead detects any voltage drop that occurs through the microphone cable and compensates for it in the N 149A power supply.  The tube warms up gradually using inverse current limiting to guarantee long life.

Filter

The electronic circuitry of the M 147 Tube mic has a flat frequency response from 20 Hz to well above 20 kHz.  Only the attributes of the capsule determine the typical sound characteristics of the microphone.

Operational Stability

Both the capsule and the entire circuitry are shock mounted to prevent any structure-borne noise.  Because of its wide operating range, the M 147 Tube can reproduce extremely low frequency signals without distortion.

This implies that the microphone may also be sensitive to unwanted LF interference by structure-borne noise, or wind noise.  To avoid possible signal degradation, Neumann offers the EA 1 elastic suspension and the WS 87 windscreen as accessories (see Accessories tab for more information.)

N 149 A Power Supply

The N 149 A universal power supply works with all mains AC voltages from 100 V to 240 V, 50 or 60 Hz. Mains power is connected through a standard IEC 320 mains socket. The only difference between the three available versions of the M 147 Tube set is the power cord supplied.

NOTE: The N 149 V power supplies that come with the M 149 Tube is fully compatible with the M 147 Tube microphone.

The M 147 Tube receives its operating power through the 8-conductor KT 8 microphone cable from the N 149 A universal power supply. The microphone's audio output signal is available through a standard 3-pin XLR connector at the power supply.  The microphone comes as a complete set, together with the KT 8 microphone cable, the N 149 A power supply, the SG 1 swivel mount stand adapter, and a cloth dust protector.  The set is packaged in an attractive aluminum case suitable for carrying and storage.

Features:

  • Universal tube microphone
  • Pressure gradient transducer with the large diaphragm capsule from the legendary U 47 and M 49
  • Transformerless circuitry
  • Low self noise level

Specifications:

  • Acoustical operating principle: Pressure gradient transducer
  • Directional pattern: Cardioid
  • Frequency range: 20 Hz - 20 kHz
  • Sensitivity at 1 kHz into 1 kOhm: 20 mV/Pa
  • Rated impedance: 50 Ohms
  • Rated load impedance: 1 kOhms
  • Equivalent noise level, CCIR*: 24 dB
  • Equivalent noise level, A-weighted*: 12 dB-A
  • Signal-to-noise ratio, CCIR* (rel. 94 dB SPL): 70 dB
  • Signal-to-noise ratio, A-weighted* (rel. 94 dB SPL): 82 dB
  • Typical SPL (tube characteristic): 114 dB for THD < 0.5 %, 134 dB for THD < 5 %
    (measured as equivalent el. input signal )
  • Maximum output voltage: 8 dBu
  • Dynamic range of the microphone amplifier (A-weighted): 102 dB for THD < 0.5 %, 122 dB for THD < 5 %
  • Powering: Power supply N 149 A
  • Matching connector: Microphone: 8-pin DIN female, Power Supply: 3-pin XLR-F
  • Weight: 460 g
  • Diameter: 57 mm
  • Length: 142 mm

*According to IEC 60268-1; CCIR-weighting acccording to CCIR 468-3, quasi peak; A-weighting according to IEC 61672-1, RMS

Power Supply for M 147/149/150 Tube Microphones
Neumann N 149 A Power Supply for M 147/149/150 Tube Microphones
Neumann's N 149 A power supply generates the necessary operating voltages for M 147 Tube, M 149 Tube or M150 Tube microphones.  Mains power is connected through a standard IEC 320 socket.  The microphone connects via an DIN-8 ...
1,099.95 1,379.00 20
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6.3" Diameter Table Stand for Microphones in Matte Black Finish
Neumann MF 4 6.3" Diameter Table Stand for Microphones in Matte Black Finish
Neumann's MF 4 is a table microphone stand with a gray cast-iron base.  The table stand has a matte black finish and rests on a non-skid rubber disk attached to the bottom.  A reversible stud and a reducer for 1/2" and 3/8" ...
339.95 429.00 21
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10m Cable for M 149, M 150, M 147 Tube Microphones with 8-Pin DIN Connectors
Neumann KT 8 10m Cable for M 149, M 150, M 147 Tube Microphones with 8-Pin DIN Connectors
Neumann's KT 8 is a microphone cable that is designed for use with their M 147, M 149, and M 150 tube microphones.  It has double twist (double helix) braiding for its shield.Diameter: 5 mmLength: 10 mConnectors: 8-pin DIN
279.95 349.00 20
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4.3" Diameter Table Microphone Stand in Matte Black Finish
Neumann MF 3 4.3" Diameter Table Microphone Stand in Matte Black Finish
Neumann's MF 3 is a table stand with an iron base.  The bottom is fitted with a non-slip rubber disk.  The stand comes with a reversible stud and an adapter for 1/2" and 3/8" threads.Weight: 3.5 lbs ...
239.95 309.00 22
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Double Microphone Stereo Bar Mount
Neumann DS 120 Double Microphone Stereo Bar Mount
Neumann's DS 120 has a 150 mm long support bar with two movable 1/2" threaded studs.  Two microphones in their mounts can be attached.  Any space or angle between the microphones is freely adjustable.The DS 120 has a 5/8"-27 ...
229.95 289.00 20
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Elastic Suspension Mount for TLM 103, TML 193, M 147 Microphones in Satin Nickel Finish
Neumann EA 1 Elastic Suspension Mount for TLM 103, TML 193, M 147 Microphones in Satin Nickel Finish
Neumann's EA 1 elastic suspension mount is designed for the TLM 103, TLM 193 and M 147 Tube microphones.  It has a swivel mount with a 5/8"-27 female thread that can be fastened to tripods.  Included is a threaded adapter to ...
269.95
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Auditorium Hanger for Swivel Mounts & Shockmounts in Satin Nickel Finish
Neumann MNV 87 Auditorium Hanger for Swivel Mounts & Shockmounts in Satin Nickel Finish
Neumann's MNV 87 auditorium hanger consists of a cable suspension and a rotating 1/2" threaded stud, to connect to e. g. swivel mounts. The stud is screwed into the threaded coupling of the swivel mount.  Then the microphone can be ...
189.95 239.00 21
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40 mm Black Microphone Stand Extension
Neumann STV 4 40 mm Black Microphone Stand Extension
Neumann's STV 4 stand extension screws in between microphone stands (Neumann's MF 4 & MF 5, for example) and swivel mounts, like the, SG 21 bk.Length: 40 mmDiameter: 19 mm
99.95 129.00 23
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Swivel Mount for TLM 102, TLM 103, TLM 193, M 147 Tube Microphones
Neumann SG 2 Swivel Mount for TLM 102, TLM 103, TLM 193, M 147 Tube Microphones
Neumann's SG 2 is a metal swivel mount for microphones that bears a 5/8"-27 female thread and a threaded adapter to connect to 1/2" & 3/8" stands.Compatible Microphones: TLM 102 TLM 103 TLM 193 M 147 Tube
69.95 89.00 21
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10M Microphone Cable
Neumann IC 3 mt 10M Microphone Cable
Neumann's IC 3 mt is a 10M microphone cable with double twist (double helix) braiding as shield. Diameter: 5 mm Length: 10 m Connectors: 3-pin XLRs Finish: Matte blackEven if very long Neumann cables are used, the electroacoustic ...
59.95 75.00 20
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Windscreen for Various Neumann Microphones
Neumann WS 87 Windscreen for Various Neumann Microphones
Typically, Neumann's windscreens are made out of open-cell polyurethane foam.  These windscreens do not cause interfering resonances and do not influence the directional pattern.  Only in the upper frequency range is the output ...
46.95 59.00 20
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