The microphone is addressed from the front, marked with the Neumann logo. The large diaphragm capsule inside the headgrille has a very smooth frequency response for all polar patterns over a wide acceptance angle. The curves are flat and parallel to the 0 frequency curve up to 10kHz within an angle of ± 100. As a result, the TLM 170 R has a very even diffuse-field response for all polar patterns. This is important in a reverberant environment, as more reflections arrive at the microphone from different directions. The acoustic information is not affected in its tonal quality when recorded by the microphone. This characteristic is achieved without resorting to corrective resonance effects. Therefore, the microphone maintains an excellent impulse response reproducing all transient phenomena of music and speech without any coloration. The capsule is elastically mounted to avoid any structure borne noise that could interfere with its operation.
In addition to the usual directional polar patterns: omnidirectional, cardioid, and figure-8, Neumann has added a hypercardioid and wide-angle cardioid characteristic. When compared to the standard cardioid pattern, the hypercardioid characteristic suppresses sound from the side more efficiently. The wide-angle polar pattern is especially useful to record large sound sources.
The letters TLM stand for "transformerless microphone". With TLM technology the usual output transformer is replaced by an electronic circuit. As with traditional transformers, it ensures good common mode rejection, and prevents RF interference, that may influence the balanced audio signal.
Use on tripods
The TLM 170 R is provided with a tilting side bracket to attach the microphone to booms or stands. The bracket is equipped with rubber elements that effectively protect the microphone from mechanical shock. If necessary, it can be mounted on the other side of the microphone as well.
Filter and attenuation
The TLM 170 R microphone has a 10dB attenuation switch to prevent the input of the following unit from being overloaded. A second switch at the rear allows attenuation of the frequencies below 100Hz to suppress undesired structure-borne noise.
All exposed surfaces of the capsule, including the diaphragms, are at ground potential. This technology makes them highly immune to electrical and atmospheric interference and contamination through dust particles.
- Acoustical operating principle: Pressure gradient transducer
- Directional pattern: Omnidirectional, wide angle cardioid, cardioid, hypercardioid, figure-8
- Frequency range: 20Hz-20kHz
- Sensitivity at 1 kHz into 1 kilohm: 8 mV/Pa
- Rated impedance: 50 ohms
- Rated load impedance: 1 kohms
- Equivalent noise level, CCIR1): 26 dB
- Equivalent noise level, A-weighted1): 14 dB-A
- Signal-to-noise ratio, CCIR1) (rel. 94 dB SPL): 68 dB
- Signal-to-noise ratio, A-weighted1)(rel. 94 dB SPL): 80 dB
- Maximum SPL for THD 0.5%2): 144 dB
- Maximum SPL for THD 0.5% with preattenuation2): 154 dB
- Maximum output voltage: 10 dBu
- Supply voltage (P48, IEC 61938): 48V ± 4V
- Current consumption (P48, IEC 61938): 3 mA
- Matching connector: XLR3F
- Weight: 625 g
- Diameter: 60 mm
- Length: 152 mm
WARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer, and Lead, which is known to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.