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DYNAMICDIRECTIONALMICROPHONEMD417
Introduction
The MD 417 isa high quality dynamic directional microphone with
a supercardioid characteristic. Robustness on the one hand and
outstanding acoustical qualities on the other hand make the
MD 417 an ideal choice for the keen audio amateur. The MD 417
features a high construction standard, which usually only appears
in dynamic top class microphones. Through the use of a precisely
adjusted shockmount for the inner parts of the microphone good
handling noise suppression has been achieved. Thus the trans-
mission of undesirable handling noise is largely suppressed.
Furthermore, the MD 417 is equipped with a speech/music
switch to cater for the various recording situations.
Connecting the microphone to tape recorders or
amplifiers
The connecting plug is simply inserted into the microphone input
socket of your tape recorder or amplifier. Sennheiser ofters two
different versions of the MD 417, which only differ by the
connecting plug.
MD 417 LM
MD 417 K
3 pin DIN-plug
6.35 mm jack plug
Before you opt for one of these two models, have a look at the
operating manual of your set to find out what kind of connector
you need. If you should have any trouble when connecting the
microphone, please contact your RTV-dealer.
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Speech/Music Switch
Hold the microphone at arms length and bring it slowly back
towards your mouth. Ifyou listen to your own voice through head-
phones you will realize that your voice sounds duller the closer
the microphones gets to your mouth. All directional micro-
phones show this increase of low frequencies at close miking.
With the speech/music switch set to position "S" the
accentuation of the low frequencies can be eliminated. Therefore,
the switch should always be set to position "S" when the
distance between mouth and sound source is less than 20 cm.
For recordings from a greater distance or when recording music
switch position "M" is preferable.
Directional effect
The MD 417 features apronounced directionality, which is called
supercardioid.
The microphone "hears" best in a forward direction and gets
more and more "deaf" towards the sides and the back.
Therefore the micraphone must always be directed towards the
sound source which is to be recorded. Due to the pronounced
directionality disturbing noise coming from the sides and from
the back are effectively suppressed. Signals reachin~ the micro-
phone diagonally from the back (120°) produce only /12(22 dB)
of the voltage which would be produced by a signal reaching the
microphone directly fram the front. Due to this characteristic the
MD 417 is especially suitable for recordings in acoustically
unfavourable environments.
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Acousticalmodeofoperation.
Frequencyresponse
Directionalpattern. . . . . .
Rejectionat1kHzand1200:t 100
Sensitivityat1kHz . .
Electricalimpedanceat1kHz
Min.loadimpedance
Connectingcable
Dimensionsinmm
Weight
pressuregradient transducer
50. .. 15000 Hz
super cardioid
22dB
2.5 mV/Pa:t 2.5dB
800 Q
4000 Q
fixed (1.5 m)
185x45 x45
approx.220 9
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