Manual

173 PRO X User Manual
Item Control Function
1 48 V switch (stage box only)
Connects 48 volts of phantom power to the XLR mic input channel connector. Suitable for a condenser
microphone or DI box.
2 TALK switch Connects talk mic and/or tone and noise generators to the input channel.
3 Gain swap button See “Using gain swap”.
4 SLOPE switch (digital trim only)
Selects the value of the high pass lter. Where, switch on (illuminated) = 24dB slope and switch o
(extinguished) = 12 dB slope.
5 SLOPE switch (digital trim only) Selects the low pass lter. Where, switch on (illuminated) = 12 dB slope and switch o = 6 dB slope.
6 stage box control knob
Adjusts the input gain of the remote amplier in 5dB steps, ranging from -5 dB to +40 dB. Note that the
stage box control knob on the control surface will only adjust the gain currently selected to the GUI input
channel strip, that is, stage box or digital trim.
7 CHECK switch (stage box only)
Monitors the mic amp input after the 30 Hz lter, but before any further processing. (The 30 Hz subsonic
lter switch accesses the high pass lter on DL431 Mic Splitter if the PRO X is connected to an XL8. In this
case, gain steps would be 2.5 dB to +45 dB.)
8 30Hz subsonic lter switch
Acts on remote amplier (mic splitter) to remove very low frequencies in the audio signal — usually
caused by noise on stage. This avoids wasting valuable headroom trying to digitise it. This button changes
the meter to monitor mic amp output directly.
9
low pass control knob
(digital trim only)
Adjusts frequency of low pass lter in the range 2 kHz to 20 kHz.
10
Low pass lter switch
/[IN]
(digital trim only)
Activates low pass lter in the input channel signal path before the insert points and EQ.
11
High pass lter switch
/[IN]
(digital trim only)
Activates high pass lter in the input channel signal path before the insert points and EQ.
12
high pass control knob
(digital trim only)
Adjusts frequency of high pass lter in the range 10 Hz to 400 Hz.
13
Phase switch
Applies a 180° inversion of the input signal polarity within the input amplier, such that channel signal
will have opposite polarity to the input signal.
This is used to correct input signal phase problems when trying to sum signals that are 180° out of phase.
For example, where two mics are facing each other when using a mic on both the top and bottom of a
snare drum. Ordinarily, the two mics would be out of phase - causing cancellation when the control centre
sums the two signals into the output. Reversing the phase of one signal causes the mics to have the same
phase, thus avoiding cancellation.
14 Gain trim (digital trim) control knob
Applies continuous trim adjustment (small digital steps) of the input signal level in the range –40 dB
to +20 dB. Gives a further 40 dB of ne adjustment (DSP) on top of the remote amplier gain setting.
Note that this control knob (control surface only) will only adjust the gain currently selected to its GUI
input fast strip, that is, stage box or digital trim.
15 Graph Shows the eects of currently applied lter.
Using gain swap
Operating the gain swap button, swaps the function of the gain trim
(digital trim) section (top of input fast strips) to that of the stage box section
(GUI channel strip). The eects of this action are only shown on the GUI,
as illustrated in the diagram below.
◊ Always check the GUI for ‘swap’ status.
Processing order
The processing order section (control surface and GUI) has a button that
changes whether the EQ or the dynamics comes rst in an input channel’s signal
path. The current order of processing is only shown on the GUI, just under the
processing order section.
Gate always precedes compression, no matter what the processing order is set to.