Neumann TLM170 R, Studio Microphone@+The TLM 170 R was the first microphone with the now so successful fet-100 technology. It offers balanced, transformerless signal decoupling and highest controllability with extremely low inherent-noise.@+@+Five directional characteristics can be selected with a rotary switch. In the sixth switch, position ""R"", the directional characteristics can be remotely switched using the N 248 network device without the need for a special cable.@+@+The microphone also has a switchable 10 dB pre-attenuation for very high sound levels and a footfall filter with an operating frequency of 100 Hz.@+@+*Area of Application*@+@+The condenser microphone TLM 170 R is a switchable large-diaphragm microphone that is characterised by its transmission characteristics and various switching options. It is used in a wide variety of applications in broadcasting, film and television and also in the semi-professional field.@+@+The directional characteristics can be switched both directly on the microphone, as well as by remote control via a dedicated network device.@+@+*Acoustic Properties*@+@+The double diaphragm capsule in the wire mesh basket of the microphone has particularly even frequency responses for all adjustable directional characteristics. This applies not only, as in many cases, to the sound coming from the front, but also to sound coming laterally within an angular range of more than ±100°.@+@+Therefore, the diffuse field frequency responses up to 10 kHz run parallel to the 0° curves. In practice, this concerns the sound components arriving indirectly via reflections in the recording room to the microphone.@+@+As a result, reverberations around the microphone that is to be recorded is not changed in its tonal character. Since no resonance effects are used to achieve the said microphone characteristics, the impulse response of the microphone is excellent. It is thus able to transmit all balancing processes in music and speech without distortion. The capsule is elastically mounted to protect against structure-borne sound transmission.@+@+*Directional Characteristics*@+@+In addition to the sphere, cardioid and figure-of-eight directional patterns, the hypercardioid and wide cardioid characteristics are also available. The hypercardioid enables - better than the cardioid - hiding sound sources placed to the right and left of the object to be recorded, while the wide cardioid is best used for transmitting widespread sound sources.@+@+*Remote Control*@+@+The remote control of the directional characteristics with the help of the network device N 248 is carried out by varying the phantom voltage in the range 48 V ± 3 V (the corresponding standard allows a range of ± 4 V).@+@+In the switch position ""R"" (= Remote control), the TLM 170 R microphone evaluates the absolute level of the phantom voltage and adjusts itself to the corresponding directional characteristic. As with conventional operation, the normal 3-pin microphone cable is...