dbx DriveRack PA, User Manual

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Detailed Parameters
Section 4
DriveRack
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PA
27 DriveRack ® PA User Manual
LIMITER
Limiter On/Off
Turns the Limiter module on and off.
OverEasy (O) Off to 10
There are ten levels of OverEasy® that can be used for the limiters. The point when the com-
pressor starts to compress is the "knee." When the compressor starts to reduce the level of a
signal abruptly as it passes over the threshold this is called "hard knee" compression. OverEasy ®
(soft knee as it is sometimes called) is when the volume of the sound is compressed gradual-
ly. OverEasy ® compression starts to compress before the level of the signal reaches the thresh-
old and reaches full compression after the level has gone above the threshold. This OverEasy ®
compression, by its very nature sounds much smoother and more natural and will be used for
most applications. When it is gentle (natural sounding or light) compression that you are look-
ing for, the compressor offers VariKnee™. VariKnee™ gives you ten levels of OverEasy ® com-
pression to choose from (1 being almost hard knee and 10 being the most OverEasy ® ). This lets
you choose the exact knee that is needed for the dynamic effect you are looking for.
Threshold (T) -40 to +20dBu
Threshold is the signal level at which the unit starts to compress the signal. If the level is set to
-10 dBu, any signal larger than -10 dBu is compressed while any signal that has a level that is
lower than -10dBu is left at the same signal level. Light compression is where only the loudest
parts of the signal go over the threshold. Very heavy compression can be achieved by setting
the threshold low enough that almost the entire signal content is over the threshold. For most
signals, the most natural compression is achieved when most of the signal content remains just
below the threshold and only the peaks cross the threshold.
The DriveRack
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PA offers alignment delay to use for compensating signal delay that occurs due
to internal speaker components such as horns, speakers and subwoofers within speaker cabi-
nets. The alignment delay is also ideal to compensate for the difference in high and low fre-
quency speed. The parameters for the alignment delay are as follows and are user adjustable:
Delay On/Off
Turns the Speaker Alignment delay on and off.
Units - Seconds, Feet or Meters
Selects the unit of measurement for the delay.
Length
Sets the amount of Speaker Alignment delay time. Delay times include: Seconds- 0.00-10.00 ms,
Feet- 0.00-11.3 and Meters - 0.00-3.43. Fine adjustments are made in 20uS increments. Coarse
adjustments are made in 21uS increments.
4.7 Alignment Delay