Using The High-Pass Filter - Radial Engineering STAGEDIRECT User Manual

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MAnAGInG FEEdBACK
The StageDirect has two built-in features that are designed to help reduce
resonant feedback when using an acoustic instrument on stage. These
include a high-pass (low cut) filter and 180° polarity reverse switches.
High-pass Filter
A powerful feedback fighting feature is the built-
in high-pass filter. This 3-position switch lets you
remove low frequencies from the signal path to
eliminate resonance and 'size the instrument'. In
other words, smaller instruments like a mandolin,
do not produce very low frequencies so removing
unused bass
achieve more gain before the onset of feedback.
Removing unneeded low frequencies from the instrument signal also
helps tremendously by cleaning up the mix. This rids the PA from warbling
effects as various frequencies modulate together which can cause the
mix to sound muddy and instruments indistinct.
The top filter setting is FLAT
or ByPASS. Use this setting
when you don't want any low
frequencies removed
your signal. This works well for
acoustic/electric bass and full
range devices like keyboards.
The middle filter setting gently
rolls off low frequencies below
60Hz. Use this setting when
you want to remove the very
low end of your signal. This
works well
guitar to sound natural while
achieving more gain before
feedback.
The bottom filter setting also
rolls off low frequency at a
gentle rate but the effect
starts at the higher 200Hz
mid-bass frequency
Use the bottom setting with
an instrument
not produce a lot of low
frequencies like
mandolin to achieve a cleaner,
tighter sound with improved
gain before feedback.
Radial Engineering Ltd.
can prevent
from
with acoustic
range.
that does
violin or
resonance and
StageDirect Filter Frequency at Position 3
+10
+8
+6
+4
+2
d
B
0
u
-2
-4
-6
-8
-10
20 50 100
StageDirect Filter Frequency at Position 3
+10
+8
+6
+4
+2
d
B
0
u
-2
-4
-6
-8
-10
20 50 100
StageDirect Filter Frequency at Position 3
+10
+8
+6
+4
+2
d
B
0
u
-2
-4
-6
-8
-10
20 50 100
8
StageDirect™ Active Direct Box
True to the Music
200 500 1k 2k
Setting 1: Flat or bypass
Hz
200 500 1k 2k
Setting 2: -3dB at 60Hz Hz
200 500 1k 2k
Setting 3: -3dB at 200Hz Hz
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