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SUPER-CARDIOID
DYNAMIC MICROPHONE MD 412
Introduction:
The super-cardioid dynamic microphone MD 412 is the right micro-
phone lor advanced amateurs who are becoming lamiliar with the
multiple possibilities 01tape recording and who wish to use a micro-
phone with good characteristics and technical comlort.
The MD 412 is equally suited tor speech or music recordings. Two
microphones 01this type can be used lor stereo recordings. The
Irequency range covers 50 . . . 14000 Hz and meets the require-
ments 01the HiFi-standard to DIN 45500. By means 01the speech/
music switch the Irequency response can be altered to meet the
HiFi-standard again when the microphone is used even at elose up
talking distance 015 cm. The super-cardioid directional characteristic
01 the MD 412 ensures good recordings even under difficult con-
ditions such as noisy backgrounds or rooms with bad acoustics.
The impedance 01the microphone is laid out in a way that the
microphone can be connected to practically all tape and cassette
recorders on the market.
The housing 01the microphone has a dull black linish. The MD 412
is supplied with a yellow windscreen and with a collapsible desk
stand.
Models:
MD 412 LM
The MD 412 LM is litted with a lixed 2 m connection cable and a
3-pin connector according to DIN 41524.
MD 412-K
The microphone MD 412-K is litted with a 2 m connection cable
and a 6.3 mm jack plug.
Operating Hints
Mounting the microphone (Fig. 1)
The microphone can be mounted either on the desk stand supplied
with the microphone or on a tripod which is available as accessory.
For litting on a tripod the upper part 01the desk stand is screwed
off and then assembled with the tripod (3/8" thread).
For recordings where it is not possible to mount a microphone on a
tripod because 01Ilexibility, the microphone can be detached lrom
the holder and may be used as a handheld microphone.
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Connecting the microphone
The microphone MD 412 is designed lor use with a tape or cassette
recorder with low or medium impedance inputs. The wiring diagram
shows the basic circuit 01the microphone (Fig 2). With the LM-
version pins 1 and 3 01the microphone's plug are interconnected
so that the MD 412 LM can be used directly with a large number
01 tape and cassette recorders.
For connecting the MD 412 LM with high-impedance microphone
inputs the cable translormer T8 514 M is available. The cable
translormer serves at the same time as an extension because it is
litted with a 5 m cable.
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Speech/music switch
The speech/music switch is an important advantage 01the MD 412
(Fig. 3). The switch is situated at the top 01the microphone and it is
easily accessible. The two possible positions 01the switch are clear-
Iy marked by the letters "M" (music) and "8" (speech). According
to the particular position 01the switch one letter will be visible. The
switch lacilitates attenuation 01the low Irequencies so that there
is no overaccentuation 01the bass range with elose-up use 01the
microphone. At a talking distance 015 cm and with the switch in
position "speech" the Irequency response 01the microphone is
again approximately linear. In the position "speech" the microphone
sensitivity to handling noises is also reduced. For recordings Irom a
larger distance and with the microphone mounted on a tripod the
switch position "M" will be chosen. For close-up use and using the
MD 412 as a hand held microphone the position "speech" wbuld be
necessary to prevent an overaccentuation 01the low Irequencies
and to take advantage 01the increased insensitivity to handling noise.
Directional properties
The microphone MD 412 has a super-cardioid directional
characteristic. The difference between the sound coming trom the
lront and the noise level picked up lrom the other sides 01the micro-
phone is extremely lavourable so that the microphone is able to
reduce a great part 01ambient noises. That means that the record-
ings with this microphone are successlull even under rlifficult acoustic-
al conditions.
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120'\ ~ ~
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250 Hz-- 15~~" .
----
500 Hz-.-
1000 Hz -
180'
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