Sennheiser MKH 106 P 48 User Manual Page 5

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Microphones
Publ. 06/02
Dynamic Microphones
Operating Principle of the Dynamic Microphone
Dynamic microphones fall into two main groups, ribbon and moving coil. All
Sennheiser dynamic microphones work on the more rugged moving coil principle.
This is like a loudspeaker in reverse: a coil of wire connected to the microphone
diaphragm is held in a magnetic field. Sound waves change the pressure of the air
they travel through. This causes the diaphragm to vibrate, thus, the coil moves in
the magnetic field and an audio frequency voltage is induced. This signal is
balanced, grounded and of low resistance and can be connected directly to the
microphone input of a tape recorder or mixing console without any electronics or
supply voltage being needed in the microphone.
Moving coil microphones are extremely rugged and reliable. Consequently, they
can be used in difficult working situations where more fragile microphones would
not be suitable. The main uses are in broadcast reporting situations and in live
stage work.
Connections
All Sennheiser dynamic microphones are fitted with a 3-pin XLR connector as
standard. This is wired so that a positive sound pressure on the diaphragm
produces a positive voltage at pin 2 compared with pin 3. Pin 1 is the ground
(screen) connection.
Description of Models
MD . . . Microphones with the prefix MD are good general purpose microphones
for studio and stage use.
COM . . . These microphones are designed for use in conference and communications
situations.
. . . evolution microphones are designed specifically for live stage applications.
The revolutionary evolution Series from Sennheiser presents a complete range of
ten dynamic and two condenser microphones covering vocal, instrument and
backline; answering every conceivable performance requirement:
Amazing SPL higher than 150 dB on all models
Outstanding feedback rejection
Advanced shock-mount design for minimum handling noise
•Rugged road-proof construction
Designed and made in Germany
XLR connection details
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