Neumann M147 Tube Microphone Kit

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. 

Product Specs

• 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, CCIR¹⁾: 24 dB
• Equivalent noise level, A-weighted¹⁾: 12 dB-A
• Signal-to-noise ratio, CCIR¹⁾ (rel. 94 dB SPL): 70 dB
• Signal-to-noise ratio, A-weighted¹⁾ (rel. 94 dB SPL): 82 dB
• Typical SPL (tube characteristic)²⁾: 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