dbx 160XT - Basic Operation and Controls; Threshold and Compression Ratio

Basic Operation (Control Descriptions)
A 8
dbx
.,o THRESHOLD
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1:1 0
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•••
3:1.0-.1
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• • • ••• • • •- GAIN REDUCTlON
160XT
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•-
1:1
•1:1
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-
B'l'PASS
SI.AVE
COMPRE!ISION
OUTPUT
OISPl.AY
THRESHOLD
OVER EASY
RATIO
GAN COMPAESSOR/UMlltR
C
Figure 10: Front Panel
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Figure 11: Rear Panel
Basic Operation (Control Descriptions)
dbx 160XT
+20
+15
2: 1
1D
-o +10
RED
4: 1
-...,
Above threshold
-'
LU
+S
~
20: 1
-'
5
0
• \ co:
ci.
,-
-5
Rotation Point Threshold
::::>
0
-10
GREEN
-15
Below thre,hold
-15 -10 ·S O +5 +10 +15 +20
INPUT LEVEL (dB)
Figure 12: Hard-Knee Compression Curve
A. THRESHOLD control (and LED indicators):
In hard-knee mode this control sets a reference
level above which input signals will be pro-
cessed by the 160XT's gain change circuitry in
the manner defined by the setting of the RATIO
control. Input signals which fall below this
level will pass through the 160XT unprocessed
(except for fixed gain changes directed by the
output control). See Figure 12.
+20
+15
~
O'.l
"O + 10
-...,
-'
w
+5
(0
_,
5
0
ci.
5
-5
0
-10
-15
4: 1
=·
, RED
#~
•
~
Above Threshold
'
#~
•
Over Easy Range
0
Below Threshold
-15 -10 -5 0 +S + 10 + 1 S +20
INPUT LEVEL (dB)
Figure 13: Threshold LEDs and Over Easy
Compression Curve
In Over Easy Mode, signal s begin to gradually
activate the 160XT's gain change circuitry as
they approach the THRESHOLD referenc_e
level and they do not get fully processed 1~ the
manner defined by the RATIO control until
they have passed somewhat above the
THRESHOLD reference level. In Over Easy
mode there is no distinct point at which pro-
cessing begins, and the THRESHOLD setting
corresponds to a point on the input/output
15