QSC GXD4 Quick Start Guide
GXD Amplifier
Quick Start Guide
EXPLANATION OF TERMS AND SYMBOLS
The term “WARNING!” indicates instructions regarding personal safety. If the instructions are not followed the result may be bodily injury or death.
The term “CAUTION!” indicates instructions regarding possible damage to physical equipment. If these instructions are not followed, it may result in
damage to the equipment that may not be covered under the warranty.
The term “IMPORTANT!” indicates instructions or information that are vital to the successful completion of the procedure.
The term "NOTE" is used to indicate additional useful information.
The intent of the lightning fl ash with arrowhead symbol in a triangle is to alert the user to the presence of un-insulated "dangerous"
voltage within the product's enclosure that may be of suffi cient magnitude to constitute a risk of electric shock to humans.
The intent of the exclamation point within an equilateral triangle is to alert the user to the presence of important safety, and operating
and maintenance instructions in this manual.
NOTE:
custom confi gurations refer to the GXD User Guide.
This Quick Start Guide is based on the basic confi guration as the amplifi er comes from the factory. For detailed instructions for
Rack-Mount the Amplifi er
1. Secure the amplifi er in the rack with eight screws (not supplied), four in front, four in back.
— Figure 1 —
TD-000449-00-A
*TD-000449-00*
Connections
L
Inputs (Channels 1 & 2)
Input Impedance: 40 kΩ Balanced, 20 kΩ Unbalanced
(Figure 2
) See Table 1 for wiring
POS NEG GROUND
XLR 2 3 1
1/4 TIP RING SLEEVE
— Table 1 —
OUTPUTS TO SPEAKERS
K
C
K
C
O
L
CH A
1+ 1-
CH B
2+ 2-
O
L
CH B
1+ 1-
— Figure 3 —
123
1. XLR female
— Figure 2 —
2. ¼" female TRS Phone Jack
3. USB Standard B connector - Used for updating the amplifi er fi rmware.
Outputs (Channels A & B)
4Ω or 8Ω impedance
1. NL4 – Do not combine the audio outputs in any way. Do not connect the audio outputs to ground.
(Figure 3)
AC Power
A. Connect the IEC power cord to the AC receptacle on the rear of the amplifi er. (Figure 4)
Controls
See
Figure 5.
1. Channel A clip indicator
2. Channel A signal presence indicator
3. Power Switch/LED on/off
4. Adjust Channel A gain
5. Home – go to Home screen / view Preset screen
6. Enter – select highlighted item and/or confi rm parameter change
7. Exit – return to previous screen and/or undo parameter changel
8. Adjust Channel B gain, select and adjust controls
9. Channel B signal presence indicator
10. Channel B clip indicator
1
2
PROCESSING
AMPLIFIER
CLIP
+
A
GAIN
P1: ST SAT FULL RANGE
SIG
STATUS: OK
34 5 6 7 8
— Figure 4 —
A
dB
-100 10.0
HOME ENTER EXIT
— Figure 5 —
B
CLIP
B
SIG
GAIN/DSP CONTRO
10
9
Front Panel
LEDs
Sensitivity
Switched
in DSP
Sensitivity
Front Panel
LEDs
TD-000449-00-A
Clip
LED
A/D
Converter
A/D
Converter
Clip
LED
Signal
Presence
Front
Panel
LEDs
Signal
Presence
Routing
Matrix
Controlled
by Preset
Selection
Front
Panel
Knobs
GXD Amplier Signal Flow
Digital Signal Processing
High-pass
Filter
High-pass
Filter
Polarity
Crossover
Polarity
Low-pass
Filter
Low-pass
Filter
— Figure 6 —
2
4-band
PEQ
4-band
PEQ
Delay Limiter MeterGain
Shown on
LCD
Delay Limiter MeterGain
D/A
Converter
D/A
Converter
A
B
Setup and Operation
Menu Tree
Preset
Preset Recall
Preset Save
Preset Save As
Key
B
Turn Knob B (or A) Select / Press Adjust
Home Screen
See Figure 8
From any screen
1. Currently active Preset (location and name)
2. Limit and Clip indicators
3. Output channel letter A and B
4. Output meter A and B (visual)
5. Output Gain (digital) Range = -100 to +10 dB
6. Amplifi er Status
HOME
Stereo DSP
Sensitivity
Crossover
EQ
Delay
Limiter
— Figure 7 —
Utilities
Status
Contrast
Timeout
Lockout
Reset
1
2
3
4
5
6
+
P1: ST SAT FULL RANGE
LIMIT CLIP
A
dB
-100 10.0
STATUS: OK
— Figure 8 —
B
Confi gurations
There are four basic types of confi guration:
• 2-channels in, stereo DSP, 2-channels out (P1 through P7) Figure 31
• 2-channels in, separate DSP, 2-channels out (P8 through P10) Figure 32
• 1or 2-channel in, separate DSP, 2-channels out (P11 through P18) Figure 33
• 1 or 2-channel in, stereo DSP, 2-channels out (P19 and P20) Figure 34
1
ST
DSP
2
— Figure 9 —
A
B
1
2
— Figure 10 —
DSP
DSP
A
B
The confi gurations are selected using the Presets. Refer to the GXD User Manual for details on all 20 available Confi gurations.
TD-000449-00-A
3
1
DSP
2
DSP
— Figure 11 —
A
B
1
ST
DSP
2
— Figure 12 —
A
B
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