Neumann M 147 Tube

Neumann M 147 Tube

Tube Microphone

Neumann O410

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 Neumann M 147 Tube Microphone

Neumann M 147 Tube
Product Code: M147TUBE
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The 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. Note: This innovative combination of current tube technology with the most advanced solid-state circuitry was decisive in awarding the 1997 TEC Award to the related M 149 Tube mic.

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. Our modern manufacturing methods makes it possible to offer this complete set at a very attractive price.

Applications
The famous capsule, together with complimenting tube characteristics, makes the M 147 Tube especially well suited as a vocal mic. 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 12 dB-A / 24 dB CCIR weighted.

Similar to the recently introduced M 149 Tube, the new 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 149 A 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, we offer the EA 1 elastic suspension and the WS 87 windscreen as accessories. During close miking of vocals we recommend using the PS 15 or PS 20a pop screen.

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 supply is fully compatible with the M 147 Tube microphone.
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
Comes with swivel stand mount made of metal, universal power supply, and cable in an attractive aluminium case
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 %
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: DIN 8F, Power Supply: XLR3F
Weight 460 g
Diameter 57 mm
Length 142 mm
 

 

 
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Neumann 18112014
Studio Monitor Systems - KH 420 | O 410 | KH 310D | KH 310A | KH 120D | KH 120A | M 52 | KH 870 | KH 810 |
Current Microphones - BCM 104 | BCM 705 | D-01 | KK104S / KK105S | KK 204 / KK 205 | KM 120 | KM 130 | KM 131 | KM 140 | KM 143 | KM 145 | KM 150 | KM 183 |
KM 184 | KM 185 | KM 183A | KM 184A | KM 185A | KM 133D | KM 183D | KM 184D | KM 185D | KM A | KM D | KMR 81 i | KMR 81 D | KMR 82 i | KMS104 / KMS105 |
KMS 104 D / KMS 105 D | KU 100 | M 147 Tube | M 149 Tube | M 150 Tube | TLM 102 | TLM 103 | TLM 103 D | TLM 107 | TLM 170R | TLM 193 | TLM 49 | TLM 67 |
U 87 Ai | U 89 i | USM 69 i | U 47 fet |
Current Accessories - AC 20 | AC 21 | AC 22 | AC 23 | AC 25 | AC 26 | AC 27 | AC 28 | AC 29 | AC 30 | AK 20 | AK 30 | AK 31 | AK 40 | AK 43 | AK 45 | AK 50 |
BCK | BS 48 i | BS 48 i-2 | Conn Kit AES/EBU | Conn Kit S/PDIF | USB - RS 485 | DMI-2 Portable | DMI 8 | DS 100-1 | DS 120 | EA 1 (mt) | EA 170 (mt) | EA 2 (mt) |
EA 2124 A (mt) | EA 4 (bk) | EA 87 (mt) | EA 89 A (mt) | IC 3 (mt) | IC 4 (mt) | IC 5 (mt) | IC 6 (mt) | IC 7 | K 11 | K 3 x 0.08 | K 3 x 0.2 | K 5 x 0.14 | K 7 X 0.14 |
KA 100 | KK 120 (nx) | KK 131 (nx) | KK 133 (nx) | KK 143 (nx) | KK 145 (nx) | KK 183 (nx) | KK 184 (nx) | KK 185 (nx) | KM 100 | KM A (nx) | KM D (nx) | KT 5 | KT 8 |
KVF 118 KA | KVF 158 KA | KVFF 148 KA | KVG 1120 nx | KVG 130 nx | KVG 160 nx | LC 2 | LC 3 KA | LC 4 | M 210/1 | M 212 c | M 214/1 | M 252 | MCA-ES | MF 2 |
MF 3 | MF 4 | MF 5 | MF-AK | MNV 100 | MNV 21 mt | MNV 87 mt | MTX 191 A | MZEF 8060/8120 | MZGE 8000 | MZGE 8002 | N 149 A | N 248 | PA 100 | PS 15 | PS 20 a |
SBK 130 A | SG 100 | SG 100-1 | SG 105 | SG 109 | SG 110 nx | SG 2 | SG 21 bk | SG 287 | SG 289 | SG 5 | SG-AK | SGE 100 | SMK 100 A | SR 100 | STH 100 | STH 120 |
STV 4/20/40/60 | TF 221 C | WKD-AK | WKE 191 Set | WKE 81 Set | WKE 82 Set | WNS 100 | WNS 110 | WNS 120 | WS 100 | WS 2 | WS 47 | WS 69 | WS 81 | WS 82 | WS 87 |
WS 89 | WSB | Z 26 mt |