Sennheiser MKH 70 Instructions for Use - Page 12

Sennheiser MKH 70 Manual

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S3 S2 -tID ,- -10 dB S1 OFF ON Setting the pre-attenuation and filters Pre-attenuation (S1) Pad switch Si is used to attenuate microphone sensitivity by 10 dB. This feature should be used only when the microphone input at downline equipment is not designed to handle the high microphone output voltages generated at high sound pressure levels (which would result in distortion). Setting the roll-off filter (S 2) The MKH 70P48 is equipped with a switchable roll-off filter to avoid low-frequency interference due to handling or wind noise. The effect of the roll-off filter on the frequency response is shown on page 14. Regardless of the setting of switch S2, a cut-off filter is effective below 70 Hz to suppress disturbances due to lowfrequency air or body noises (subsonic signals). Setting the presence filter (S 3) The presence filter serves for compensation of losses at the high frequency end due to propagation loss and windscreens. The effect of the filter on the frequency response ist shown on page 14. 12

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S3
S2
—tID
,-
-10
dB
S1
OFF
ON
Setting
the
pre
-attenuation
and
filters
Pre
-attenuation
(S1)
Pad
switch
Si
is
used
to
attenuate
micro-
phone
sensitivity
by
10
dB.
This
feature
should
be
used
only
when
the
microphone
input
at
downline
equipment
is
not
designed
to
handle
the
high
microphone
output
voltages
generated
at
high
sound
pressure
levels
(which
would
result
in
distortion).
Setting
the
roll
-off
filter
(S
2)
The
MKH
70
P
48
is
equipped
with
a
switch
-
able
roll
-off
filter
to
avoid
low
-frequency
interference
due
to
handling
or
wind
noise.
The
effect
of
the
roll
-off
filter
on
the
frequency
response
is
shown
on
page
14.
Regardless
of
the
setting
of
switch
S2,
a
cut-off
filter
is
effective
below
70
Hz
to
suppress
disturbances
due
to
low
-
frequency
air
or
body
noises
(subsonic
signals).
Setting
the
presence
filter
(S
3)
The
presence
filter
serves
for
compensa-
tion
of
losses
at
the
high
frequency
end
due
to
propagation
loss
and
windscreens.
The
effect
of
the
filter
on
the
frequency
response
ist
shown
on
page
14.
12