The Neumann TLM 170 R black multi-directional studio condenser microphone is a stereo set of two multi-directional large-diaphragm condenser microphones that uses FET 100 technology, a transformerless balanced output stage, low self-noise and an impressive dynamic range. Five directional characteristics are selectable using a rotary switch. In the sixth position, marked "R", the directivities can be remotely controlled with the included N 248 power supply. No special cable is required for this purpose. The microphone features a 10 dB attenuation switch on the rear for extremely high sound pressure levels, and a high-pass filter to suppress structure-borne noise. A second switch on the rear allows the microphone to attenuate the frequency response below 100 Hz to suppress unwanted structure-borne noise. The TLM 170 R can be used for many diverse applications in professional recording studios, broadcasting, film and television, as well as for semi-professional productions. The large-diaphragm capsule inside the head grille exhibits a very uniform frequency response for all directivities over a wide acceptance angle. The curves are flat and parallel to the 0° frequency curve up to 10 kHz within an angle of ± 100°. Consequently, the TLM 170 R has a very uniform diffuse-field response for all directivities. This is important in a reverberant environment, as more reflections reach 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. The microphone maintains an excellent impulse response reproducing musical transients and speech without any colouration. The capsule is elastically mounted to prevent any structure-borne noise that could interfere with its operation. Compared to the standard cardioid directivity, the hypercardioid characteristic more effectively suppresses sound coming from the sides. The wide-angle directivity is particularly useful for recording large sound sources. The N 248 controls the directivity remotely by varying the phantom power supply voltage. The range is ± 3V relative to the nominal value of 48V. The rotary switch on the microphone must be in the R, remote control position. In this switch position, the TLM 170 R microphone analyses the absolute value of the phantom power supply and selects the corresponding directivity. A standard 3-pin microphone cable is used, as with conventional microphone operation. Cable lengths can reach 300 metres. 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 could influence the balanced audio signal. An adjustable side mount for attaching the microphone to booms or stands is included. The mount is fitted with rubber elements that effectively protect the microphone from mechanical shocks. If necessary, it can also be mounted on the other side of the microphone. When using the IC 4 cable, the mount and its bracket must be removed. The microphone can then be connected to the swivel connector of the cable. All exposed surfaces of the capsule, including the membranes, are at earth potential. This technology makes them highly immune to electrical and atmospheric interference and contamination by dust particles. - Large-diaphragm microphone with local and remote control - Pressure gradient transducer with dual-diaphragm capsule - Omnidirectional, wide cardioid, cardioid, hypercardioid and figure-eight directivities - Switchable low-frequency attenuation and 10 dB pre-attenuation - Tiltable and elastically suspended mount