User manual SENNHEISER MKH 815 T-U

[. . . ] As with dynamic microphones, only two wires are required to connect the microphone when this powering system is being used. The operating current is led along the same wires as the audio Irequency signal, so that the circuitry in the microphone does not have to be connected to earth. Because 01 these earth Iree techniques the highest possible values 01 immunity lrom noise or disturbance are achieved. the connedion 01 Sennheiser condenser microphones , as also dynamic microphones , is carried out using the principal 01 voltage matching. [. . . ] The advantages 01 this system are that, neither impedance variations 01 the microphone output, nor 01 the amplilier input exerci se a noticeable inlluence on the total Irequency response. The source impedance 01 the Sennheiser condenser microphones with A-B powering is small (approx. 8 11at 1000 Hz), wh ich means that it need only be demanded 01 the amplilier that its input impedance be larger than 600 11. Senn heiser condenser microphones produce relatively large output voltages, these can be up to 1 volt with maximum sound pressure levels. This has the advantage that even with long cables induced interlerence signals can be disregarded. Also the internal noise produced by the microphone does not contribute to the total noise level. The microphones are litted with high Irequency lilters, wh ich ensure that no high Irequency signals lrom the microphone can , affect the external circuitry, and also that the microphone itsell is protected lrom high Irequency disturbance. It Is, therelore, not necessary, even under the most difficult conditions, to take special precautions such as double screening 01 the cables or the provision 01 high Irequency lilters. Sennheiser condenser microphones are polarised according to OIN standard ie. When apressure signal strikes the capsule Irom the lront, Pin 1 goes positive with relerence to Pin 3. According to the OIN standard the resistors should be 2 x 180 0. Windshield MZW 30 The foam-rubber-windshield should be drawn over the sound inlets of the microphone when wind disturbances are evident. Swivel mount MZG 415 The swivel mount gives the possibility to use the desk stand together with the microphone clamp or the shock mount for the MKH 815 T-U Power unit MZN 16 T and T-U For simultaneous powering of two microphones. connection to 220 volt or 110 volt supplies. The unit can be included in the microphone cable at any point. Fitted with 3 pin connectors according to DIN 41524. With 3/8" threads and prevents recordings being disturbed by footfall or other strong mechanical disturbances. Desk stand MZT 441 The MZT 441 is together with the swivel mount MZG 415 and the microphone clamp MZQ 415 or the shock mount MZS 415 a stable desk stand for the MKH 4061. Desk stand MZT 100 A stable desk stand with good handling noise suppression. For use with the MKH 815 T-U the MZT 100 is to be combined with the swivel mount MZG 415 and the microphone clamp MZQ 415 or the shock mount MZS 415. [. . . ] For use with the MKH 815 T-U the MZT 100 is to be combined with the swivel mount MZG 415 and the microphone clamp MZQ 415 or the shock mount MZS 415. Transistor amplifier KAT 15-2 For the connection of condenser microphones, or symmetrical low impedance dynamic microphon es, to the line and accessory inputs respectively, of the Nagra 111 Nagra IV. Roll-oft-filter MZF 15 The roll-oll-filter MZF 15 should be included only between supply voltage source and amplifier input. The microphones are powered from the transmitter. [. . . ]