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the signal totally disappears – the two channels are
now set identical – now pan channel two fully left and
channel three fully right for normal operation).
Channels two and three are controlled as a single
fader (mechanically or electrically coupled together).
The stereo width is controlled by the relative levels –
less side is a narrower image, more side is a wider
image. The displacement of the faders by 3 dB, as
shown in the diagram as an example, results in 1:1
ratio matrixing.
During matrixing, it should be taken into account that
the direction of off-axis sound signals can be
determined less and less at high frequencies due to
the increasing directivity of the shotgun microphone.
This may lead to diffused spatial effects, which can be
desirable or undesirable depending on the recording
situation. In case of doubt, the proportion of the S
signal should not be chosen too high. In some cases, it
might be necessary to reduce the treble in the S
channel on the mixing console. At low frequencies
below 300 Hz, it is very difficult to locate sounds for
physiological reasons. Since the S system of the
microphone, due to its design principle, is more
sensitive than the M system to low-frequency
interference caused for example by wind, the bass in
the S channel should be reduced if required (eg: with a
high-pass filter).
Specifications
Acoustic operating principle
Pick-up pattern
Sensitivity at 1000 Hz
Frequency response
Max. SPL
Max. output voltage
Equivalent noise level
Output impedance at 1000 Hz < 25 Ω
Min. load impedance
Power supply
Connector
Dimensions
Weight
Operating temperature range
Humidity range
10
M: pressure gradient /
interference tube receiver
S: pressure gradient receiver
M: super-cardioid/lobar
S: figure-of-eight
M: 25 mV/Pa (-32 dBV)
S: 10 mV/Pa (-40 dBV)
40 - 20,000 Hz
130 dB SPL (63 Pa)
1.5 V
M: 14 dB-A / 26 dB-CCIR
S: 22 dB-A / 34 dB-CCIR
1 kΩ
P48: 48 ± 4 V / 2 x 2.3 mA
5-pin XLR, male
Ø 19 mm x 280 mm
220 g
-20 to +60 °C
< 95 % relative humidity
MKH 418 S
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