QSC CXD4.2-xx, CXD4.3-xx, CXD4.5-xx Users Manual

CXD Amplifiers

User Manual

CXD4.2 — 4 Channel, 2000 W Amplifi er

CXD4.3 — 4 Channel, 4000 W Amplifi er

CXD4.5 — 4 Channel, 8000 W Amplifi er

TD-000367-01 -B

*TD-000367-01*

EXPLANATION OF 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.

IMPORTANT SAFETY INSTRUCTIONS

WARNING!:

TO PREVENT FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water.

6. Clean only with a dry cloth.

7. Do not block any ventilation opening. Install in accordance with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifi ers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A
grounding type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided
plug does not fi t into your outlet, consult an electrician for replacement of the obsolete outlet.

10. To reduce the risk of electrical shock, the power cord shall be connected to a mains socket outlet with a protective earthing connection.

11. The appliance coupler, or the AC Mains plug, is the AC mains disconnect device and shall remain readily operable after installation.

12. Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the point where they exit from
the apparatus.

13. Only use attachments/accessories specifi ed by the manufacturer.

14. Unplug this apparatus during lightning storms or when unused for long periods of time.

15. Refer all servicing to qualifi ed service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply
cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture,
does not operate normally, or has been dropped.

16. Adhere to all applicable, local codes.

17. Consult a licensed, professional engineer when any doubt or questions arise regarding a physical equipment installation.

18. Do not use any aerosol spray, cleaner, disinfectant or fumigant on, near or into the apparatus. Clean only with a dry cloth.

19. Do not unplug the unit by pulling on the cord, use the plug.

20. Do not submerge the apparatus in water or liquids.

21. Keep ventilation opening free of dust or other matter.

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2

Maintenance and Repair

WARNING!:

maintenance and repair methods. To avoid a danger of subsequent damage to the apparatus, injuries to persons and/or the
creation of additional safety hazards, all maintenance or repair work on the apparatus should be performed only by a QSC
authorized service station or an authorized QSC International Distributor. QSC is not responsible for any injury, harm or related
damages arising from any failure of the customer, owner or user of the apparatus to facilitate those repairs.

Advanced technology, e.g., the use of modern materials and powerful electronics, requires specially adapted

FCC Statement

For CXD4.3 and CXD4.5

NOTE:

This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a
commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.

For CXD4.2

NOTE:

generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.

RoHS STATEMENT

The QSC CXD4.2, CXD4.3 and CXD4.5 amplifi ers are in compliance with European Directive 2011/65/EU – Restriction of Hazardous Substances (RoHS2).

The QSC CXD4.2, CXD4.3 and CXD4.5 amplifi ers are in compliance with “China RoHS” directives. The following chart is provided for product use in
China and its territories:

QSC CXD4.2, CXD4.3, and CXD4.5 Amplifi ers

部件名称

(Part Name)

铅

(Pb)

电路板组件

(PCB Assemblies)

机壳装配件

(Chassis Assemblies)

O: 表明这些有毒或有害物质在部件使用的同类材料中的含量是在 SJ/T11363_2006 极限的要求之下。

XOO O O O

XOO O O O

汞

(Hg)

(Toxic or hazardous Substances and Elements)

有毒有害物质或元素

镉

(Cd)

六价铬

(Cr(vi))

多溴联苯

(PBB)

多溴二苯醚

(PBDE)

(O: Indicates that this toxic or hazardous substance contained in all of the homogeneous materials for this part is below the limit requirement
in SJ/T11363_2006.)

X: 表明这些有毒或有害物质在部件使用的同类材料中至少有一种含量是在 SJ/T11363_2006 极限的要求之上。
(X: Indicates that this toxic or hazardous substance contained in at least one of the homogeneous materials used for this part is above the
limit requirement in SJ/T11363_2006.)

Warranty

For a copy of the CXD warranty, visit the QSC website at www.qsc.com

TD-000367 -01 -B

3

Introduction

Built for system integrators, the CXD series amplifi ers provide multi-channel amplifi cation with built-in DSP and enough power to drive wide varieties
of speaker systems with optimal energy effi ciency. The CXD Series consists of three light-weight, 2RU, four-channel amplifi ers with on-board DSP and
fl exible channel combining as well as 70V and 100V direct drive. These amplifi ers not only provide the power and processing to make your system
perform better, they offer outstanding effi ciency ensuring that energy costs are kept to a minimum over the life of the installation.

CXD amplifi ers feature Flexible Amplifi er Summing Technology (FAST). Depending on the model, 2000, 4000, or 8000 Watts of total power can be
distributed across one to four outputs. In addition, the CXD4.3 and CXD4.5, can drive 70V or 100V speaker lines directly from any one or all of the
four outputs, and the CXD4.2 can drive 70V or 100V speaker outputs from bridged channels. This fl exibility allows CXD Series amplifi ers to drive
(for example) two full-range, surface-mounted loudspeakers along with a subwoofer and one 100 V distributed loudspeaker line; or a high-power
subwoofer and a bi-amplifi ed full-range loudspeaker; three 70V distributed loudspeaker lines and a subwoofer; or a single very high-power channel to
drive monster subwoofers.

The CXD Series amplifi ers use QSC’s third-generation class-D power amp design in combination with a custom power stage utilizing a new output
device (4.3 and 4.5 only). In addition, CXD amplifi ers employ the proven PowerLight power supply in conjunction with Power Factor Correction (PFC)
(4.3 and 4.5 only) which aligns the current waveform with the AC mains voltage waveform. PFC enables the CXD Series amplifi ers to draw current
from the wall in a more effi cient and controlled manner resulting in very high power from a single standard AC breaker. Additionally, the CXD Series
amplifi ers offer multi-stage sleep modes saving energy when possible without sacrifi cing performance. The result is an exceptionally powerful and
fl exible platform that offers very high effi ciency.

With four channels of amplifi cation plus signal processing in just 2RUs, the CXD series replaces equipment taking up as much as three times
the rack-space.

A single CXD Series amplifi er is a capable and sophisticated loudspeaker processor. Integration of processing and amplifi cation means that the DSP
knows exactly what the amplifi er is doing so dynamics processing can be far more accurate and effective. This approach employs both RMS and Peak
Limiters that allow the amplifi er and loudspeaker to produce more output without being pushed to distortion or destruction.

The on-board DSP offers four channels of cross-over fi lters, 5-band parametric EQ/Low-shelf/High-shelf, alignment delay and dynamics processing
— everything needed to optimize a loudspeaker system. Additionally when using QSC loudspeakers, CXD amplifi ers provide Intrinsic Correction™, a
combination of fi ltering, limiting and loudspeaker knowhow that was fi rst developed for QSC's WideLine line-array loudspeakers. Intrinsic Correction
compensates for the non-linearity in horn and driver design resulting in exceptional performance.

The CXD also includes manufacturers' recommended tunings for a number of the most popular passive loudspeakers. A system setup wizard helps
you select the right preset, or select one of the 20 confi guration templates and create tunings that you can save in the user preset library.

Whether using the dedicated front panel user interface featuring a 400 x 240 display, rotary encoder and navigation buttons, or the Amplifi er Navigator
software on a PC or Mac, the CXD amplifi ers are an ideal amplifi er/processing platform for installations.

Unpacking

There are no special unpacking instructions. You may want to keep the shipping material for the unlikely event that the amplifi er should need
returning for service.

Package Contents

1. Quick-Start Guide TD-000350

2. Warning Information Sheet TD-000420

3. CXD Amplifi er

4. IEC AC Power Cord

5. Euro-style Connector Plug, 3-pin (4)

TD-000367 -01 -B

6. Euro-style Connector Plug, 8-pin (1)

7. Euro-style Connector Plug, 3.5 mm, 2-pin (1)

8. Euro-style Connector Plug, 3.5 mm, 3-pin (1)

9. USB Cable (1)

4

Features

Amplifi er Front Panel

11

12

13

14
15

16

10

1

2
3

4
5
6
7
8
9

— Figure 1 —

1. Output channels are labeled A, B, C, and D

2. Output Channel Mute Buttons and LEDs (Red)

3. Output Channel Limiter LEDs (Red)

4. Output Channel -10 dB below maximum amplifi er output (Blue)

5. Output Channel -20 dB below maximum amplifi er output (Blue)

6. Soft Power Button (Blue/Red)

7. Channel Select Buttons and LEDs (Amber for Input, Blue for Output)

8. Input Channel Clip LEDs (Red)

9. Input Channel Signal-Present LEDs (Blue)

10. Input channels are labeled 1, 2, 3, and 4

11. LCD Graphic Display

12. HOME Button

13. ENTER Button

14. MASTER CONTROL Knob

15. EXIT Button

16. GAIN Button

Amplifi er Rear Panel

NOTE:

position of the fan and the eight-pin Euro-style connector and associated information are interchanged.

The CXD4.3, and CXD4.5 models have a different rear panel confi guration than the CXD4.2 rear panel. The difference is that the

1 4 5 6 7 8 102 93

USB

HEARTBEAT
GPO

GPI

THIS PRODUCT SHOULD BE SUPPORTED ON ALL
FOUR CORNERS WHEN INSTALLED IN A RACK

OUTPUTS TO SPEAKERS

PARALLEL CHANNEL

COMBINING APPLICATIONS

CH AB

SETTINGS CAN BE

T1

+

T2

T1

+

CH A

­+

CH B

­+

CH C

­+

CH D

-

CONFIGURED FOR

70V, 100V AND

T2

200V DIRECT

OUTPUT.

T3

BRIDGED

T4

CH A+B

T1+T3

T5

CH C+D

T5

+

T6

CH AB+CD

T7

+

T1
T3

+

T8

-

T3

+

T4

-

CH CD

T5

+

T6

-

T7

+

T8

-

CH ABC

-

T2

-

T1

+

T4

-

T3

+

T6

-

T5

+

T7

-

CH ABCD

+

T2

-

T1

T5

-

T3

+

T4

-

T7

-

T5

+

T6

-

T7

+

T8

-

— Figure 2 —

1. USB Type B, four-pin

2. GPO/Heartbeat (output) Euro-style Connector, 3-pin

3. GPI (input) Euro-style Connector, 2-pin

4. Four three-pin Euro-style Connectors

5. One eight-pin Euro-style Loudspeaker Connector

6. Cooling fan

7. AC Power Switch

8. Locking IEC Power Connection

9. Rear Rack-mount Bracket

10. Front Rack-mount Brackets

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5

Installation

The following steps are written in the recommended installation order.

Rack-Mount the Amplifi er

The CXD Series amplifi ers are designed to be mounted in a standard rack-mount unit. The amplifi ers are 2RU high, the CXD4.3 and CXD4.5 are 381
mm (15 in) deep, the CXD4.2 is 229 mm (9 in) deep.

1. Secure the amplifi er in the rack with eight (four for the CXD4.2) screws (not included), four in front, four in back. For complete instructions,
refer to TD-000050 "Rear Rack Ears Installation Guide" which can be found on the QSC Website (www.qsc.com).

CAUTION!:

2 cm clearance.

Be sure that nothing is blocking the front or rear ventilation openings, and that each side has a minimum of

AC Mains

WARNING!:

dangerous voltage at the output terminals on the rear of the amplifi er. Use
caution not to touch these contacts. Turn off the AC Mains disconnect switch
prior to making any connections.

When the AC Power is on, there is a potential of having

The CXD4.3 and CXD4.5 amplifi ers have a Universal power supply 100 – 240 VAC, 50 – 60 Hz,
with an IEC locking connector. The CXD 4.2 has a Universal power supply 100 - 132/200-240
VAC, 50 – 60 Hz, with an IEC locking connector.

1. Make sure the power switch on the rear of the amplifi er is off.

2. Connect the IEC AC cable between the amplifi er rear AC connector and the AC source.

— Figure 3 —

AC Power

NOTE:

audio is present.

When you remove power from the amplifi er, then re-apply the power, the amplifi er returns to its last state.

If the amplifi er has no audio for fi fteen minutes, the amplifi er stops switching. The amplifi er returns to the Run mode the instant

TD-000367 -01 -B

6

Inputs

Connect the Audio Inputs

Equilibrada

— Figure 4 —

No equilibrada

— Figure 5 —

USB

HEARTBEAT
GPO

GPI

ENTRADAS ENRUTABLES

2143

— Figure 6 —

There are four three-pin Euro-style connectors labeled 1 through 4 providing the audio
inputs on the CXD Amplifi ers. A single input can be mixed to one or a combination of
outputs. You can use from one to four of the inputs. The inputs are 10 kΩ balanced or
unbalanced, with a sensitivity of either +4 or +14 dBu.

1. Make sure your audio source devices are powered off.

2. Wire the audio line-level source to up to four Euro-style connectors (supplied). You

-

may use either balanced inputs (Figure 4) or unbalanced inputs (Figure 5).

NOTE:

The CXD Series has the capability of routing the inputs to different
outputs. Be sure that the connections you make here match the confi guration
of the amplifi er.

3. Plug the connectors into the appropriate receptacles (ROUTABLE INPUTS 1, 2, 3, 4)

Figure 6 and Figure 7.

-

+

— Figure 7 —

+

-

+

-

+

USB (Optional)

The USB cable (supplied) connects to a Mac or PC for use with the Amplifi er Navigator software. You can update the amplifi er fi rmware, save and
deploy confi guration fi les, and more. Refer to the Amplifi er Navigator online help for details.

GPIO/Heartbeat

There are two 3.5 mm Euro-style connectors on the rear of the amplifi er.

• Heartbeat — The heartbeat output supplies a square wave signal of 1 Hz @ 3.3 V. This signal can connect to a life-safety system to monitor the
go/no-go condition of the amplifi er. The amplifi er must be completely incapable of producing output for the heartbeat signal to stop. A missing
heartbeat alerts the life-safety system of the disabled condition. A user-initiated condition such as muting the outputs, placing the amplifi er in
Standby mode, or placing the amplifi er in Mute All mode, does not stop the heartbeat.

• GPO — The GPO can be triggered (High or Low fl ag) by one of the following faults:

◦ All Faults
◦ Thermal Limiting
◦ Impedance (selectable impedance boundaries)

• GPI — The GPI Input allows you to do one of the following from a remote location:

◦ Put the amplifi er into Standby or Run mode,
◦ Mute or unmute all outputs, or
◦ Recall one of two Presets

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7

Outputs

The CXD amplifi ers have four confi gurable outputs. You can set the power, combine outputs (bridged and parallel), and adjust the DSP for each
output. When the output confi guration of the amplifi er changes, the output terminals, controlled by relays, change accordingly. Use the diagrams
shown in

Select the Output Confi guration

The fi rst step in confi guring your amplifi er is to select a Preset based on the loudspeakers being connected to the amplifi er. The Preset Name is
representative of the confi guration. You can select a factory preset, and then adjust the parameters as needed, then save the confi guration as a user­defi ned preset. In addition, you can use the "Preset Wizard" on page 15 to create presets from one of the basic channel combinations. When the
confi guration is changed, all four channels are automatically muted.

Figure 9 thru Figure 17 as a reference for wiring the loudspeakers.

F1: A B C D

F7: ABC D

M

ABC

M

Current Preset Name

Selected Preset Name
Input Mixer

D

Frequency Range color

Output Confi guration

Input number

Sub-woofer

Low-Frequency

Mid Frequency

High-Frequency

Full Full Range

Frequency Range Color Codes

— Figure 8 —

WARNING!:

1. Turn the AC Mains power switch on the back of the amplifi er to on. The amplifi er starts in the Run mode.

the amplifi er. Use caution not to touch these contacts. Turn off the AC Mains disconnect switch prior to making any connections.

2. Press and release the front-panel power button. The button fl ashes red, the amplifi er is in Mute All mode.

3. Select the confi guration appropriate for your loudspeakers, using either Preset Recall, or the Preset Wizard.

When the AC Power is on, there is a potential of having dangerous voltage at the output terminals on the rear of

TD-000367 -01 -B

8

The following is a list of confi gurations for 1, 2, 3, and 4-channel outputs. This is not an exhaustive list, but is intended to give you an idea of what is
available and how the outputs would be wired.

One-Channel Confi gurations

F9: ABCD

F9: ABCD

M

ABCD

ABCD Parallel

— Figure 9 —

F8: AB+CD

F8: AB+CD

M

AB+CD

AB Parallel
Bridged with
CD Parallel

— Figure 10 —

Two-Channel Confi gurations

F6: A+B C+D

F6: A+B C+D

MM

A+B

C+D

A+B Bridged
C+D Bridged

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F5: AB C+D

F5: AB C+D

MM

AB

C+D

— Figure 11 —

AB Parallel
C+D Bridged

— Figure 12 —

9

F4: AB CD

F4: AB CD

AB Parallel
CD Parallel

MM

AB

F7: ABC D

F7: ABC D

MM

ABC

CD

D

— Figure 13 —

ABC Parallel
D Single

— Figure 14 —

Three-Channel Confi gurations

F3: A+B C D

F3: A+B C D

A+B Bridged
C Single
D Single

MMM

A+B C D

— Figure 15 —

F2: AB C D

F2: AB C D

M

AB

M

M

C

D

— Figure 16 —

AB Parallel
C Single
D Single

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10

Four-Channel Confi guration

F1: A B C D

F1: A B C D

M M

ABMC

M

A Single
B Single
C Single

D

D Single

— Figure 17 —

Connect the Loudspeakers

WARNING!:

dangerous voltage at the output terminals on the rear of the amplifi er. Use
caution to not touch these contacts. Turn off the AC Mains disconnect switch

1. Turn the AC Mains power switch, on the back of the amplifi er, to OFF.

2. Connect the loudspeaker wiring to the 8-pin Euro-style connector. Refer to Figure 9

3. Install the Euro-style connector onto the rear of the amplifi er as shown in Figure 18.

4. Use a Phillips screwdriver to secure the connector.

prior to making any connections.

thru Figure 17.

When the AC Power is on, there is a potential of having

— Figure 18 —

TD-000367 -01 -B

11

Amplifi er Control

A

(power
button)

MUTE

SEL

B

MUTE

SEL

1

2

OUTPUT

LIM

-10

-20

CLIP

SIG

INPUT

C

MUTE

SEL

3

D

MUTE

SEL

4

HOME

ENTER

EXIT

GAIN

MASTER
CONTROL

EXIT Button

EXIT

• Navigates out of the menu structure and parameter selection.

• In the edit mode, pressing EXIT reverts the value back to its prior
state, and exits the edit mode.

HOME Button

HOME

• If you are on the Home screen, pressing HOME displays the
alternate Home screen. Pressing HOME again returns you to the
primary Home screen.

• If you are on a navigation screen, pressing HOME takes you to the
home screen.

• If you are on an edit screen, pressing HOME will confi rm any value
being edited and take you to the Home screen.

— Figure 19 —

GAIN Button

GAIN GAIN

• Pressing the GAIN button from any screen takes

Off Mode

• Rear power switch is off, the amplifi er is not
operable. The power switch is the AC Mains
disconnect.

• The power button is not illuminated.

• Turn the power switch to on. The amplifi er enters the mode it was in
when power was removed. The power button is illuminated based on
the mode.

• GPI setup has an effect on the operation of the power button.

Run Mode

• From Standby or Mute All modes, press and release the
power button on the front panel.

• The power button is illuminated blue.

• The amplifi er is fully operable; audio can pass.

• GPI setup has an effect on the operation of the power button.

you to the output gain screen for the most recently accessed output
channel.

• Pressing GAIN again confi rms the gain change and returns to the
screen you were on when you pressed GAIN.

• The Gain button illuminates green when selected.

SEL Buttons

SEL SEL

• Use these buttons to navigate between input
channels or output channels. For example, if you are adjusting output
gain on channel A, pressing the channel B SEL button takes you to the
gain adjustment for channel B.

• These buttons change both Input and Output selection at the same
time. For example, if you select Output A then switch to an Input
screen, you are on Input 1.

• The SEL buttons are active on any Input or Output screen as indicated
by an illuminated SEL button, and a label in the upper right corner of
the screen (Input 1-4 or Output 1-4).

Standby Mode

• From Mute All or Run modes, press and hold the power

• The SEL buttons illuminate blue for output channels, and amber for
input channels.

button on the front panel for two to three seconds.

• The power button illuminates solid red.

MUTE Buttons

MUTE

• The front panel LCD is off.

• The amplifi er is not operable; audio will not pass.

• GPI setup has an effect on the operation of the power button.

• Use these buttons to mute the audio of the associated
output channel.

• When the output confi guration is changed, the MUTE buttons are

Mute All Mode

engaged automatically. You must manually unmute the channels.

• From the Run Mode, quickly press and release the power
button.

• The power button fl ashes red.

LIM LEDs

• Illuminates red when the Limiter is engaged.

LIM

• The outputs are muted and amplifi ers are off.

• The front panel and DSP functionality are fully operable. Any changes
you make are saved and take effect in the Run Mode.

• GPI setup has an effect on the operation of the power button.

-10 and -20 LEDs

• Indicates the dB below maximum output level of
the channel.

-10 & -20

Master Control Knob

• Scrolls up/down and right/left to select menu items and
parameters

• Adjusts parameters

ENTER Button

• Navigates into the menu structure

• Enters the edit mode for adjusting parameters

• Confi rms the changes you make, and exits the edit mode.

TD-000367 -01 -B

ENTER

CLIP LEDs

• Illuminates red when the input signal is being clipped.

SIG LEDs

• Illuminates blue when a signal greater than -40 dB is
present.

12

CLIP

SIG

CXD Amplifi er Signal Flow

Input Settings Output Processing Amp Confi g.

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

A/D Meter Gain Mixer Mute

A/D Meter Gain Mixer Mute

A/D Meter Gain Mixer Mute

A/D Meter Gain Mixer Mute

Button

Activated

High-pass

High-pass

High-pass

High-pass

Filter

Filter

Filter

Filter

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Crossover

Low-pass

Filter

Low-pass

Filter

Low-pass

Filter

Low-pass

Filter

5-Band

PEQ

5-Band

PEQ

5-Band

PEQ

5-Band

PEQ

Delay

Delay

Delay

Delay

RMS / Peak

Limiter

RMS / Peak

Limiter

RMS / Peak

Limiter

RMS / Peak

Limiter

D / A

D / A

D / A

D / A

A

B

D

E

Set by Preset or Wizard

Meter

Meter

Meter

Meter

— Figure 20 —

Menu Tree

Presets Inputs Outputs Utilities

Preset Recall Input Sensitivity Mixer w/Noise & Tone Status

Preset Save Input Gain Mode (Lo-Z, 70V, 100V) Amp ID

Preset Wizard Spkr Processing Display

Crossover Lockout

PEQ Password

Delay GPI

Limiter GPO

Array Correction*

Load Speaker

*For QSC Line Arrays only.

Save Speaker

AC Power On

After connecting the outputs to the loudspeakers, you may turn the amplifi er on.

1. Make sure the output gain settings for all audio-source devices (CD Players, Mixers, Instruments, etc.) are at the lowest output (max
attenuation).

2. Turn on all audio sources.

3. Turn the AC Mains power switch on the back of the amplifi er to ON. The amplifi er starts in the state it was in when power was removed. If
the amplifi er is in Standby or Mute All mode (Power button LED solid red or blinking), press the Power button to change the amplifi er to Run
mode.

4. You can now bring up the outputs of your audio sources.

TD-000367 -01 -B

13

Screen Types

Informational

Informational screens, like the HOME screen, are
designed to provide you with a good amount of
useful information at a glance.

F1: A B C D

Home (Press HOME for more information)

Full

A - FR

+1.5 dB

Amp Status:

Full

B - FR

+3.5 dB

121 V 7.2 AAC Voltage: AC Current:

OK

Full

C - FR

+1.5 dB

Full

D - FR

+1.5 dB

Preset # and Name
Location and breadcrumbs

Channel Confi guration
and Gain

AC Voltage and Current

Amplifi er Status

— Figure 21 —

Navigational

Navigational screens provide the means to move
around and select menu items. Use the Master
Control knob, ENTER and EXIT buttons for navigation.
This is an example of one type of navigational screen,
there are others.

Parameter Editing

Parameter editing screens allow you to select, edit,
and confi rm changes for various system parameters.
Use the ENTER button to edit and confi rm changes
to parameters. Use the Master Control knob to select
parameter, and make adjustments. Use the EXIT
button to exit the edit mode without saving changes.

F1: A B C D

Menu

PRESETS

Preset Recall and Save

INPUTS

— Figure 22 —

F1: A B C D

Gn/Pol

Gain

-7.0 dB

Polarity

POL+

Output

A

20 dB

-60 dB

Preset # and Name
Location and breadcrumbs

Empty area indicates no
selections above

Current Menu Selection

Next Menu selection below (CW)

Parameter being edited

Parameter not selected

Parameter selected

Gain

-7.0 dB

— Figure 23 —

About Presets

The CXD amplifi ers are preset driven. An understanding of how presets work is essential to get the most out of the amplifi ers. A Preset, in the context
of the CXD amplifi ers, is a combination of amplifi er confi guration (inputs and outputs), DSP, and loudspeaker assignments. When a preset is recalled it
can change the output routing and any of the DSP settings.

The CXD amplifi ers come with 20 unchangeable factory presets, and 50 user-defi ned presets. The factory presets are designed to be starting points
for creating the presets you need for your particular installation. Factory presets F1: thru F9: have no DSP or loudspeaker assignments, only output
confi gurations. Factory presets F10: thru F20: include basic settings along with the output confi gurations.

User-defi ned Presets

Presets U1 through U50 are all confi gured from the factory the same as factory preset F1. Anytime you save a preset, it overwrites one of the
User-defi ned Presets. There are three ways of creating user-defi ned presets.

• You can recall a user-defi ned preset with the output confi guration you want, then modify the DSP parameters and SAVE it by overwriting the one
you recalled, or you can SAVE AS (overwrite) another user-defi ned preset.

• You can recall a factory preset, modify the parameters, then SAVE AS one of the user-defi ned presets. The SAVE procedure is not available for
factory presets.

• You can use the Preset Wizard to set the output confi guration, power output, and other parameters, then SAVE AS (overwrite) a user­defi ned preset.

TD-000367 -01 -B

14

Preset Wizard

The Preset Wizard simplifi es the preset creation process, and allows you to create a preset from the ground up. The Preset Wizard provides a
mechanism for you to select the desired power and load. Based on these selections, the best amplifi er confi guration is selected and you are then
allowed to select and assign loudspeakers to each output.

NOTE:

The power levels shown in this procedure are taken from the CXD4.3 unless indicated otherwise. CXD4.2 will show less power

and CXD4.5 will show greater power. For complete details refer to the "Specifi cations" on page 31.

HOME > PRESETS > PRESET WIZARD (ENTER)

Step 1 —

About the Preset Wizard

ABOUT SPEAKERS SAVE

Preset Wizard does the following :

• Configures the amplifier

• Loads DSP settings for assigned speakers
Tips:

• Start with the highest power

• Speakers do not need to be assigned
to each output

NEXT

Preset Wizard does the following:

• Confi gures the amplifi er

• Loads DSP settings for
assigned speakers

Tips:

• Start with the highest power

• Speakers do not need to be
assigned to each output

To Continue, press

ENTER

HOME > PRESETS > PRESET WIZARD > ENTER (ENTER)

Step 2 —

Adjust Impedance and Power

OUTPUTS SPEAKERS SAVE

Output:

Imped:

Power:

Remaining Power Available: 1875 W

Enter Load Profile (Impedance and Power)

AB C D

8.0 - - - - - -

625 - - - - - -

Adjust Impedance based on the total
loudspeaker load connected to the
channel.

Default = 8 

Default = min. for amp

Impedance and Power are dynamically
linked for adjustments.

Scroll to select (Impedance or Power)

To edit, press

Turn to adjust parameter

To confi rm, press

Repeat for remaining output channels

ENTER

ENTER

Possible Output Mode Combinations using the Preset Wizard

B

A

- - -

- - -

25%

25%

*

C

- - -

25%

D

- - -

25%

AB

- - -

50%

C

- - -

25%

D

- - -

25%

Modes: A B = Separate Channels / A+B = Bridge Mode / AB = Parallel Mode

* Percentages are used to represent the power for different amplifi er models.

Step 3 —

Select Output Channel for Speaker Assignment

OUTPUTS SPEAKERS SAVE

Output:

Imped:

Power:

Spkr:

ADCB

8.0 8.08.08.0

625 625625625

- - - - - - - -- - - -- - - -

Assign

Assign

AB

- - -

50%

AssignAssign

CD

50%

A+B

C

- - -

- - -

50%

— Figure 24 —

When you are fi nished setting the
Impedance and Power for each
output, continue to scroll to access
the SPEAKERS tab.

Loudspeaker assignment is optional,
you can assign a loudspeaker to one
or more channels, or none at all.

- - -

25%

- - -

25%

D

A+B

C+D

- - -

- - -

50%

50%

ABC

- - -

75%

D

- - -

25%

AB + CD

- - -

100%

ABCD

- - -

100%

Scroll to select the Output channel.

To Assign a loudspeaker, press

ENTER

Continue to the next Step.

TD-000367 -01 -B

15

Step 4 —

Select Speaker Type for Channel

OUTPUTS SPEAKERS SAVE

A

Speaker:

Band:

Filter:

Output:

QSC AP-5152

Full Range

Default

ASSIGN

Band and Filter selections
are based on the Speaker
you select. You must select a
loudspeaker before selecting
Band and Filter.

When you have fi nished
assigning loudspeakers,
continue to scroll to access the
SAVE tab.

To edit Speaker, press

Scroll to select a Speaker model

To confi rm, press

Scroll to select (Band, Filter)

To edit, press

Turn to adjust parameter

ENTER

ENTER

ENTER

To confi rm, press

ENTER

Scroll to select ASSIGN

To assign the speaker to the output channel, press

Step 5 —

Select User Preset Number

OUTPUTS SPEAKERS SAVE

User Preset Number:

New Preset Name

Con f i g - A

SAVE

Edit preset number or press EXIT

21

Scroll to the Save screen

To edit User Preset number, press

Turn to adjust parameter

To confi rm, press

Scroll to the New Preset Name

ENTER

ENTER

ENTER

Step 6 —

Assign New User Preset Name

SPEAKERSABOUT

User Preset Number:
New Preset Name

My S pk r

SAVE

Press ENTER to edit name

SAVE

21

Indicates editing

Indicates “Speaker
Preset Name”
is selected

Up to 21 characters
A - Z / a - z / 0 - 9 /
_ / - / space

To add Speaker Profi le Name, press

Scroll to desired letter position press

Turn to select desired character press

When fi nished with lettering, press twice

EXIT

When fi nished, scroll to SAVE press

To RECALL Preset, press

ENTER

ENTER

ENTER

ENTER

ENTER

TD-000367 -01 -B

16

To not RECALL Preset, press

EXIT

Modify Presets

To modify a preset, recall the preset with the desired output confi guration, modify the Input parameters, Output parameters, then save the preset. In
addition, you can save the preset as you are going thru the creation process.

Recall a Preset

A Preset includes the output confi guration, input parameters, and loudspeaker profi les (DSP, load, and assignments). There are 20 factory presets that
can be recalled, but not overwritten, and 50 user-defi ned presets that can be recalled and overwritten.

• Factory presets F1: Confi g thru F9: Confi g contain output confi gurations only.

• Factory presets F10: thru F20: contain the output confi gurations and basic DSP for the confi gurations.

• There are 50 user presets that can be recalled and overwritten.

Recalling a Preset changes the confi guration of the amplifi er. You can recall factory or user-defi ned presets.

HOME > PRESETS > PRESET RECALL (ENTER)

Step 1 —

Select Preset

F1: A B C D

F1: A B C D

MMMM

A B C D

Scroll to desired Preset

20 Factory, 50 User-defi ned

Indicates more Presets

Input Sub MF FullHFLF

Step 2 —

Confi rm Selection

F1: A B C D

F18: 3-Way

To select the Preset confi guration, press

To confi rm the selection, press

ENTER

ENTER

MMM

A+B

Press ENTER to confirm selection

C D

The message at the bottom changes to: "Recalling Preset now..."
You may hear relays clicking!

TD-000367 -01 -B

17

Set up the Inputs

NOTE:

Changes made to input levels are in real time.

HOME > INPUTS > SENS (ENTER)

Step 1 —

Select Input Sensitivity

F1: A B C D

Input

Const

Sens

Sens

+4 dBu

Input

1

Gain (dB)

0.0

After confi rming the Sensitivity
setting, you can scroll to Gain
and adjust it, before moving to
the next Input.

Constant Sensitivity gives you
maximum power out when the
input device's output reaches
the Sensitivity you set.
+4 dBu = 70V into 8Ω
+14 dBu = 100V into 8Ω

Scroll to select (+14 or +4 dBu)

To confi rm selection, press

To move to the next input, press

Repeat this procedure for
remaining input channels

ENTER

SEL

If sensitivity setting is +4 dBu, a 4 dBu signal from the input device results in 100V (CXD4.5) and 70V (CXD4.3) at the output of amplifi er. So amplifi er
gain, at +4 dBu sensitivity, is 38.5 dB (CXD4.5) and 35.5 dB (CXD4.3). Input signal will clip 10 dB above sensitivity setting.

If sensitivity setting is +14 dBu, a 14 dBu signal from the input device results in 100V (CXD4.5) and 70V (CXD4.3) at the output of the amplifi er. So amp
gain at 14 dBu sensitivity is 28 dB (CXD4.5) and 25 dB (CXD4.3). Input signal will clip 10 dB above sensitivity setting.

HOME > INPUTS > INPUT GAIN (ENTER)

Step 2 —

Set Input Gain

F1: A B C D

Input

1

Scroll to select (-100 thru 20 dB)

To confi rm selection, press

To move to the next input, press

Repeat this procedure for

ENTER

SEL

remaining input channels

Input

Const

Sens

Sens

+4 dBu

Set up the Outputs

NOTE:

Mixer

The CXD amplifi ers are equipped with an internal mixer that allows you to
adjust the signals from each input to each of the four outputs. Figure 25 is a
diagram of the Mixer for Output Channel A.

• The default setting for the Input Gain is 0.0 dB, and is set in the
INPUTS section.

• Each output channel has four inputs, each controlled by a Mixer Gain.

• The Input Gain and Mixer Gain are cumulative. For example, if you set the
Input Gain to +2.0 dB, and the Mixer Gain to -5.0 dB, the resulting output
is -3.0 dB

As a default channel "1" is mixed to output A, 2 to B, 3 to C, and 4 to D, all
other input channels are set to -100. Adjusting an Input Gain changes that
channel's input to the mixers of all channels. Changing a Mixer Gain affects only
that input for the selected output channel.

Changes made to outputs are in real time.

Gain (dB)

0.0

INPUTS OUTPUT

MIXER A

Input 1

Input 2

Input 3

Input 4

0.0 dB

0.0 dB

0.0 dB

0.0 dB

Output Mixers

Output Mixers

Output Mixers

Output Mixers

0.0 dB

B
C
D

-100 dB

B
C
D

-100 dB

B
C
D

-100 dB

B
C
D

— Figure 25 —

Output

A

TD-000367 -01 -B

18

HOME > OUTPUTS > MIXER (ENTER)

Step 1 —

Set Mixer Gains

F1: A B C D

Output

A

Scroll to the Input you wish to adjust

To edit, press

ENTER

Adjust the Gain for the selected input

ENTER

SEL

EXIT

MIXER

Input 1

4.2

Input 2

-100.0

Input 3

-49.9

Input 4

-100.0

To confi rm, press

Repeat for the remaining inputs

To move to the next Output, press

When you are fi nished, press

HOME > OUTPUTS > MIXER (ENTER)

Step 1 —

Test - Pink Noise and Tone Generator

MIXER

F1: A B C D

TEST

Source

Ton e

Noise

OFF

Ton eONFreq

Output

A

PINK

20.0 Hz –20 kHz

Output Levels
Off (-80 dB) to -10 dB

1.0k

• You must be in the TEST mode to use Noise and Tone

• Noise and Tone cannot be used on the same channel at the same time.

• Use the Source to switch between Noise and Tone.

• Noise and Tone do not go through the Mixer.

• Noise and Tone Gain controls are independent of the Input and Output

Scroll to TEST press

On Source, press

Select Tone or Noise press

Scroll to Noise press

Adjust Noise to desired level press

Scroll to Tone press

Adjust Tone to desired level press

Scroll to Freq press

Adjust to desired frequency press

When you are fi nished, press

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

Gain controls.

Mode Select

HOME > OUTPUTS > MODE (ENTER)

Step 1 —

TD-000367 -01 -B

Select the Output Mode

F1: A B C D

Outputs > Mode

MODE SELECT

Low-Z, 70V, 100V

Output

Mode:

Low-Z

Press ENTER to confirm

Scroll to select Low-Z, 100V, or 70V

A

The CXD4.3 and CXD4.5 provide 70V and 100V direct
drive for each output. The CXD4.2 offers 70V and 100V
direct drive when two output channels are bridged.

19

To confi rm, press

ENTER

Loudspeaker Processing

The Speaker Processing section allows you to make adjustments to the Crossover, EQ, Delay, Limiter, and QSC Array details for each output channel.
In addition, you can load a pre-defi ned loudspeaker then make any adjustments needed, and save the changes as a user-defi ned loudspeaker.
Depending on the loudspeaker selection, various parameters are not available for adjustment. When you make adjustments, you are making them in
real time. If audio is passed while making changes, it is affected by the change.

The following instructions are not all in menu order, and all are optional. Repeat the following procedure for each output channel as necessary.

Load Speaker Profi le

HOME > OUTPUTS > SPKR PROC > LOAD SPKR (ENTER)

A loudspeaker profi le includes all the DSP and loudspeaker characteristics available in the SPKR PROC section. When you LOAD a loudspeaker, you
are loading all of the DSP and characteristics of that loudspeaker. You can start by loading a loudspeaker and then make modifi cations and save your
new profi le, or you can build the profi le without loading a loudspeaker, and then save it as a new profi le. If you load a QSC loudspeaker, the amplifi er
is set for that specifi c loudspeaker and some parameters may be locked out because they are set to their optimal value by the Intrinsic Correction
Calculator, and should not be adjusted. The CXD comes with a number of supported loudspeakers from other manufacturers. Refer to the list under

"Supported Loudspeakers" on page 30. There may be additions to this list in the future that can be loaded with fi rmware updates.

NOTE:

Step 1 —

you made are overwritten.

Load Speaker About

If you make changes to any of the loudspeaker processing parameters, and then LOAD a loudspeaker profi le, all the changes

SPEAKERS LOADABOUT

This function will load a speaker from the
database to this output channel; it loads
all of the speaker tuning parameters into the
outprocessing.

NEXT

This function will load a speaker from the
database to this output channel; it loads all
of the speaker tuning parameters into the
out-processing.

To continue, press

ENTER

Step 2 —

Load an Existing Loudspeaker for the Selected Output

ABOUT SPEAKERS LOAD

A

Speaker:

Band:

Filter:

Output:

QSC AP-5152

Fullrange

Default

LOAD

Band and Filter selections
are displayed and
constrained based on the
loudspeaker.

To edit Speaker, press

Scroll to select Speaker model

To confi rm, press

Scroll to (Band, Filter)

To adjust, press

Adjust selected parameter

ENTER

ENTER

ENTER

TD-000367 -01 -B

20

To confi rm, press

Scroll to LOAD

To Load the speaker profi le to the selected output, press

ENTER

ENTER

Crossover

HOME > OUTPUTS > SPKR PROC > CROSSOVER > HIGH-PASS (or LOW-PASS) (ENTER)

NOTE:

If you select a QSC Loudspeaker, you will see that the high-pass, or low-pass fi lters are LOCKED. QSC has given these
loudspeakers specifi c voicings tailored for that loudspeaker that should not be changed. If there is any crossover adjustments applied in
these voicings, you will be able to see the applied crossover on the graphs of the Crossover screens.

Step 1 —

HOME > OUTPUTS > SPKR PROC > CROSSOVER > GAIN/POL > GAIN (ENTER)

Step 2 —

Set the Crossover High- and/or Low-pass fi lters

F1: A B C D

HPF

Freq

70.0

Typ e

BWrth

Output

A

20 dB

-60 dB

Slope

24dB/oct

Set the Crossover Gain and Polarity

F1: A B C D

Gn/Pol

Gain

-5.5 dB

Polarity

POL +

Output

A

20 dB

-60 dB

Freq: 20 - 20 kHz

Type:

• Butterworth

• Linkwitz-Riley,

• Bessel-Thomson

Slope:
6dB to 48dB/oct depending
on Type

+

Gain –100 to +20 dB

–

Polarity + or –

Scroll to select (Freq, Type, Slope)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

Scroll to select (Gain or Polarity)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

ENTER

ENTER

EXIT

EQ

HOME > OUTPUTS > SPKR PROC > EQ > BAND 1, 2, 3, 4, or 5 (ENTER)

The graph is a composite of all fi ve bands. Each band has a full range of 20 Hz to 20 kHz.

Step 1 —

Set the EQ

F1: A B C D

Band 1

Typ e

Parametrc

Gain

-35 dB

Output

A

20 dB

-60 dB

Freq
100BW.01

Type: Bypass, Parametric, Low Shelf,
High Shelf (Default Bypass)

Gain: -40 to +20 dB (Default 0.00)

Freq: 20 to 20kHz (Band 1 Def 100 Hz)
(Band 2 Def 500 Hz)
(Band 3 Def 1 kHz)
(Band 4 Def 2.5 kHz)
(Band 5 Def 5 kHz)

BW: 0.01 to 3.00 Octive
(Default 1.00 Oct.)

Scroll to select

(Type, Gain, Freq, BW)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

TD-000367 -01 -B

21

Delay

HOME > OUTPUTS > SPKR PROC > DELAY (ENTER)

Distance measurements are based on the speed of sound being 340 meters/second, or 2.94 milliseconds/meter.

Step 1 —

Set the Output Delay Time

F1: A B C D

Outputs > Spkr Proc > Delay

Distance

3.4 meters

11.3 feet

Delay

State

Bypass

Time (ms)

10.0

Output

A

Delay:

0.0 ms to

75.00 ms

0.021 to 1.0 ms increments

State:
Bypass or
On

Scroll to (Delay Time or Bypass)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

Limiter

NOTE:

If you select a QSC Loudspeaker, you will see that the limiter is LOCKED. QSC has given these loudspeakers specifi c limiter
settings tailored for that loudspeaker that should not be changed. If there is a limiter applied in these voicings, you will be able to see the

HOME > OUTPUTS > SPKR PROC > LIMITER

Step 1 —

applied limiter on the graph.

Gain Reduction

F1: A B C D

Outputs

DELAY

LIMITER

Limiter Params

ARRAY

Gain Reduction

0.0 dB

Press Enter to Edit

XO EQ DL LM ACLM

Output

A

The Gain Reduction currently
being applied to the selected
Output channel.

To edit the Limiter settings, press

ENTER

Step 2 —

Set the Limiter Mode

TD-000367 -01 -B

F1: A B C D

AUTO

Typ e
Med

SpkrPwr

200W

Output

A

SpkrImp

8.0

22

To edit the Limiter mode, press

Turn to select the mode for the Limiter

AUTO

ADV

OFF

To confi rm setting, press

ENTER

ENTER

Set AUTO Mode Parameters

NOTE:

SpkrPwr maximum output depends on the amplifi er and the output confi guration you select. The maximum for separate
channels is 1250 W, a single combined channel (ABCD or AB+CD) can be up to 5000 W depending on the amplifi er.

HOME > OUTPUTS > SPKR PROC > LIMITER > AUTO

Step 1 —

Set the AUTO Mode Parameters

F1: A B C D

AUTO

Typ e
Med

SpkrPwr

200W

Output

A

SpkrImp

8.0

Type:

Aggressive
Medium

Mild

SpkrPwr:

10.0 W to 1250 KW

SpkrImpd:

2.0  to 16.0 

Scroll to select (Type, SpkrPwr, SpkrImp)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

Type

- the Auto Limiter Type is a protection level and its values are, Mild, Medium and Aggressive. This Type parameter, along with the Power Rating
and Impedance drive an algorithm designed to maximize the performance of your loudspeakers. They set the RMS and Peak threshold values as well
as their attack and release setting.

SpkrPwr

- if a single speaker is being driven, the SpkrPwr should be the continuous power rating of that loudspeaker. If multiple speakers are being

driven this value should be the combined power rating for the load.

SpkrImp

- if a single speaker is being driven, the SpkrImp should be the nominal impedance of that loudspeaker. If multiple speakers are being

driven this value should be the combined impedance for the load.

Set Advanced Mode Parameters

NOTE:

If you select a QSC Loudspeaker, you will see that the limiter is LOCKED. QSC has given these loudspeakers specifi c limiter
settings tailored for that loudspeaker that should not be changed. If there is a limiter applied in these voicings, you will be able to see
the applied limiter on the graph. The limiter is also locked if the 70V or 100V mode is selected.

HOME > OUTPUTS > SPKR PROC > LIMITER > ADV

Step 2 —

Set the ADV Mode Parameters

F1: A B C D

ADV

RMSThr

100.0V

PkThr

155.0V

Output

A

RMSThr: 3.0V to 100.0V

PkThr: 5.0V to 155.0V

PkAttk: 0.10 ms to 20.0 ms

PkRel: 1.00 ms to 1.0 s

RMSAttk: 0.05 s to 10.0 s

RMSRel: 1.0 s to 60.0 s

Thr = Threshold, Pk = Peak, Attk = Attack, Rel = Release

Scroll to select (RMSThr, PkThr,

PkAttk, PkRel, RMSAttk, & RMSRel)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

TD-000367 -01 -B

23

Array Correction

HOME > OUTPUTS > SPKR PROC > ARRAY (ENTER)

Step 1 —

NOTE:

Set Splay Angle and Number of Boxes in the Array

You must have a QSC line array loaded in order to access the Array Correction parameters.

F1: A B C D

AC

Output

Splay Angle: Total cumlative
angle of the array.

Array Length: Total number of
boxes in the array.

Angle

15.0

Boxes #

4

A

Angle:

0.0° to 90.0°

Boxes #:
0 to 24

Scroll to select (Angle or Boxes#)

To edit, press

Turn to adjust parameter

To confi rm, press

To exit, press

ENTER

ENTER

EXIT

Save a Loudspeaker

When you Save a speaker profi le, you are saving all of the Output settings currently active for the channel. The new profi le you save does not need to
be Loaded, it is already active.

HOME > OUTPUTS > SPKR PROC > SAVE SPKR (ENTER)

Step 1 —

Save Loudspeaker About

SPEAKERSABOUT SAVE

This function is provided to enable saving a
speaker to the database.

BEFORE saving a speaker, enter the desired
speaker tuning parameters (Gain, Crossover,
EQ, Delay, and Limiter). THEN save the
speaker to the database.

NEXT

This function is provided to enable saving a
speaker to the database.

BEFORE saving a speaker, enter the desired
speaker tuning parameters (Gain, Crossover,
EQ, Delay, and Limiter). THEN save the speaker
to the database.

To continue, press

ENTER

Step 2 —

Step 3 —

Save a Loudspeaker with Custom Load Profi le

ABOUT SPEAKERS SAVE

Output Data:

Band: 2-Way LF

Power Rating:

Enter Speaker Info

AB + CD

16.0Nominal Imped:

1000

Name the Loudspeaker Profi le

SPEAKERSABOUT

Speaker Profile Name

My S pk r

SAVE

SAVE

Press ENTER to edit name

Nominal Impedance
and Power Rating are
the nominal settings for
a single loudspeaker of
this type.

Indicates editing

Indicates "Speaker
Profi le Name"
is selected.

Up to 21 characters
A - Z / a - z / 0 - 9 /
_ / - / space

Scroll to select (Band,

Nominal Imped, Power Rating)

To edit, press

Turn to adjust parameter

To confi rm, press

After confi rming settings, Scroll to SAVE

To add Speaker Profi le Name, press

Scroll to desired letter position press

Turn to select desired character press

When fi nished lettering, press twice

EXIT

Scroll to SAVE press

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

TD-000367 -01 -B

24

Save a Preset

After modifying the Inputs and Outputs for all channels, save the current settings as one of the 50 user-defi ned presets (U1: thru U50:). Each of the
user presets, by default, is the same as factory preset F1: A B C D, so when you save the preset you are "overwriting" the preset currently in that
numbered position. If you started by recalling a factory preset, you must use the SAVE AS feature. If you started with a user-defi ned preset, you can
overwrite the preset you started with using the SAVE feature, or use the SAVE AS feature to overwrite a different user preset.

SAVE AS

HOME > PRESETS > PRESET SAVE> PRESET SAVE AS > (ENTER)

Step 1 —

Save a New Preset - Select and Edit Preset Number

U1: A B C D

User Preset Number:

New Preset Name

Con f i g - A

21

Current active
preset.

To edit User Preset number, press

Turn to select desired number (1 thru 50)

To confi rm User Preset Number, press

ENTER

ENTER

SAVE

Edit preset number or press EXIT

Step 2 —

Name the Preset

U1: A B C D

User Preset Number:

New Preset Name

Con f i g X A

Press ENTER to edit preset name

SAVE

21

Indicates editing

Indicates "Speaker
Profi le Name"
is selected.

Up to 21 characters
A - Z / a - z / 0 - 9 /
_ / - / space

Scroll to New Preset Name press

Scroll to desired letter position press

Turn to select desired character press

ENTER

ENTER

ENTER

Step 3 —

Save Preset

U1: A B C D

Con f i g X A

Press ENTER to save preset

User Preset Number:

New Preset Name

SAVE

21

When the Preset is
saved, it becomes the
active preset.

When you are fi nished naming, press

Scroll to SAVE

Press

To confi rm SAVE, press

EXIT

ENTER

ENTER

TD-000367 -01 -B

25

SAVE

Use this SAVE procedure when you are saving the preset by overwriting the currently active user preset. After you use the SAVE AS feature to save the
preset you are working on, it then becomes the currently active preset, and you can use the SAVE feature to save as you work on the preset.

HOME > PRESETS > PRESET SAVE > SAVE (ENTER)

Step 1 —

Overwrite Preset

U1: A B C D

To save, press

To exit without saving, press

ENTER

EXIT

SAVE

To confi rm Save, press

Press ENTER to save preset

ENTER

Utilities

The Utilities section provides the following amplifi er information and functionality:

Amplifi er Health

HOME > UTILITIES > STATUS (ENTER)

Step 1 —

Check the Amplifi er's Health

UTILITY - STATUS

Amp Total Run Time: 22:37:48 Hrs

Hardware: V12

Firmware: V1.0.22

DC Status: OK

VRail 1: 148V

VRail 2: -150V

Temperature:

CH1 & CH3: 27C

CH2 & CH3: 29C

Power Supply: 24C

Amp Total Run Time:
HH:MM:SS

Hardware version

Firmware version
update thru Amplifi er Navigator

DC Status:
VRail 1 = +147VDC +/- 5V typical
VRail 2 = -147VDC +/- 5V typical

Temperature (CXD 4.3 & 4.5)

Thermal Limiting starts at 69ºC

Thermal Shutdown at 80ºC

Name the Amplifi er

HOME > UTILITIES > AMP ID (ENTER)

Step 1 —

TD-000367 -01 -B

Name the Amplifi er

UTILITY - AMP ID

Serial #: 123abc Amp ID: my amp ID

Change Amp ID to:

my amp I D

CONFIRM

Indicates editing

Indicates "New
Preset Name"
is selected.

Up to 21 characters
A - Z / a - z / 0 - 9 /
_ / - / space

26

To edit "Change Amp ID to:" press

Scroll to desired letter position press

Turn to select desired character press

When you are fi nished, press

Scroll to CONFIRM press

ENTER

ENTER

ENTER

ENTER

ENTER

Setup the Display

HOME > UTILITIES > DISPLAY (ENTER)

Step 1 —

Display

UTILITY - DISPLAY

DISPLAY TIMEOUT NEVER

TIMEOUT FUNCITON

Blackout

Scroll to desired DISPLAY TIMEOUT press

Scroll to TIMEOUT FUNCTION press

Turn to desired FUNCTION press

Scroll to CONFIRM press

ENTER

ENTER

ENTER

ENTER

CONFIRM

DISPLAY TIMEOUT
The HOME, ENTER, EXIT, GAIN, and the MASTER CONTROL exit Demo or Blackout
mode. The power, MUTE and SEL buttons are still functional, in addition to exiting
the Demo or Blackout mode.

Password (Security)

HOME > UTILITIES > PASSWORD (ENTER)

Step 1 —

Add or Change the Password

UTILITY - CHANGE PASSWORD

Current Password:

QSC

New Password:

MY pa s wosr

CONFIRM

The default password for all amplifi ers is QSC – all uppercase.
The password can be up to 10 characters long, and contain,
A — Z a — z 0 — 9 _ - space

Never
10, 30 sec
1, 3, 5, 10, 15 min

To enter "Current Password:", press

With the fi rst letter position selected, press

Turn to select desired Character press

When you complete the current password,

the "New Password:" is automatically selected.

Repeat the procedure for the "New Password:"

Scroll to CONFIRM press

TIMEOUT FUNCTION

Blackout
Demo

ENTER

ENTER

ENTER

ENTER

Lock the Amplifi er

All controls are locked except the Mute buttons, front power button, rear power switch, Enter button and Master Control knob to unlock the amplifi er.

HOME > UTILITIES > LOCKOUT (ENTER)

Step 1 —

TD-000367 -01 -B

Enter Password to Lock or Unlock

UTILITY - LOCKOUT

Enter Password:

my pa s wosr

CONFIRM

With the fi rst letter position selected, press

Scroll to desired character press

Continue this process to enter

the remainder of the password.

When you complete the password correctly,

CONFIRM is automatically selected.

To lock or unlock the amplifi er, press

27

ENTER

ENTER

ENTER

GPIO Connections

HOME > UTILITIES > GPI > ENTER

NOTE:

If you Enable the GPI with nothing connected to the input pin, the GPI performs the selected GPI FUNCTION. In order to undo
the result, you must manually reset whatever the GPI FUNCTION was, connect a switch to the input as described below, or you can
reverse the GPI HIGH and GPI LOW.

Step 1 —

Setup the GPI (Input) Feature

UTILITY - GPIO - INPUT

GP INPUT

CONFIRM

*For STANDBY and MUTE ALL, the GPI HIGH and
GPI LOW results are linked opposites.

+3.3
VDC

DISABLE

STANDBYGPI FUNCTION

RUNGPI HIGH

STANDBYGPI LOW

3.3 VDC (High)
or
Ground (Low)

STANDBY

GPI HIGH - Run or Standby
GPI LOW - Standby or Run

MUTE ALL

GPI HIGH - Mute All or Unmute
GPI LOW - Unmute or Mute All

RECALL PRESET

GPI HIGH - U1 through U50
GPI LOW - U1 through U50

Select ENABLE or DISABLE press

Scroll to GPI FUNCTION press

Select desired function press

Scroll to GPI HIGH press

Select GPI HIGH result* press

Scroll to GPI LOW press

Select GPI LOW result* press

When fi nished, scroll to CONFIRM press

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

HOME > UTILITIES > GPO > ENTER

Step 1 —

Setup the GPO (Output) Feature

UTILITY - GPIO - OUTPUT

GP OUPUT DISABLE

IMPEDANCE BOUNDARIES

0.1LOW 500.0HIGH

*Impedance settings are available only when
GPO FUNCTION is ALL FAULTS or IMPEDANCE

GPO FUNCTION

ALL FAULTSGPO FUNCTION

LOWGPO FLAG

CONFIRM

Heartbeat — 1 Hz square wave @ 3.3 V output

GPO FLAG — +3.3 VDC (High) or Ground (Low)

GPO FLAG

IMPEDANCE BOUNDARIES*

ALL FAULTS
THERMAL LIMITING
IMPEDANCE

LOW
HIGH

0.1 Ohms

500.0 Ohms

Select ENABLE or DISABLE press

Scroll to GPO FUNCTION press

Select desired function press

Scroll to GPO FLAG press

Select LOW or HIGH press

Scroll to LOW* press

Select LOW impedance value* press

Scroll to HIGH* press

Select HIGH impedance value* press

When fi nished, scroll to Confi rm press

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

TD-000367 -01 -B

28

Step 2 —

Setup the GPO (Output) Feature

UTILITY - GPIO - OUTPUT

GP OUPUT DISABLE

IMPEDANCE BOUNDARIES

0.1LOW 500.0HIGH

CONFIRM

GPI FUNCTION

ALL FAULTS
THERMAL LIMITING
IMPEDANCE

ALL FAULTSGPO FUNCTION

LOWGPO FLAG

GPO FLAG

LOW
HIGH

Select ENABLE or DISABLE press

Scroll to GPO FUNCTION press

Select desired function press

Scroll to GPO FLAG press

IMPEDANCE BOUNDARIES*

0.01 Ohms

500.0 Ohms

ENTER

ENTER

ENTER

ENTER

TD-000367 -01 -B

29

Supported Loudspeakers

QSC

AC-C4T

AC-C6T

AD-C1200

AD-C42T

AD -C81Tw

AD-C820

AD-C821

AD-CI52ST

AD-CI52T

AD-S10T

AD-S112sw

AD-S12

AD-S28Tw

AD-S32T

AD-S4T

AD-S52

AD-S52T

AD-S6T

AD-S82

AD-S82H

AD-S8T

AP5102

AP5122

AP5122M-FOH

AP5122M-MON

AP 5152

CSM12

CSM15

GP118

GP212

GP218

WL118

WL2082

WL2102

WL212

WL218

WL3082

Generic

FULLRANGE

SUB

LF

MF

HF

B52

LX1515V3

LX18V3

MX 1515

MX18S

Cerwin-Vega (CV)

EL-36C

TS-42

Classic Pro

CSP12

CSP15

EV

ELX112

ELX115

ELX215

SX300E

TX 2152

TX2181

JBL

JRX112M

JRX115

J RX 118S

JRX125

MR X515

MRX518S

MRX525

MRX528S

PR X415M

PRX425

SR X712M

SR X715

JBL

SRX718S

SRX722

SRX725

SRX728S

SRX738

VRX932LA

Martin Audio

DD6 APRON

DD6 FLOOR

DD6 POLE

LE1200S

W8VDQ

Nexo

PS8

PS10-R2

PS15-R2

Peavey

PR10

PR12

PR15

PV115

P V118

PV12M

PV215

PVX12

PVX15

SP218

SP4

Yamaha

BR12

BR12M

BR15

C115V

S115V

S215 V

SM15V

SW218V

NOTE:

TD-000367 -01 -B

All third party presets are not approved by the manufacturer but were created using the manufacturer's published data.

30

Specifi cations

CXD4.2 CXD4.3 CXD4.5

Channel Confi guration Peak

70 V or 100 V Mode 70 V

100 V

4 Independent Channels

A, B, C, D

8 

4 

2 

2 Channels BTL Bridged
A+B or C+D
Doubles Voltage

8 

4 

2 

2 Channels Parallel
AB or CD
Doubles Current

8 

4 

2 

1 Channel 3CH Parallel
ABC
Triples Current

8 

4 

2 

1 Channel Bridged/Parallel
AB+CD
Doubles Current and Voltage

8 

4 

2 

1 Channel 4CH Parallel
ABCD
Quadruples Current

8 

4 

2 

1

3

N/A

3

N/A

500 W

700 W

625 W

1200 W
1500 W

4

NR

500 W

950 W

1200 W

500 W

950 W

1800 W

1600 W
2500 W

4

NR

500 W

1000 W

1700 W

5

5

5

5

5

5

Continuous

Typical Distortion

8 

4 

Maximum Distortion 4  - 8  1.0% 1.0% 1.0%

0.01 - 0.03%

0.03 - 0.06%

Frequency response (8 ) 20 Hz - 15 kHz +/- 0.2 dB

20 Hz - 20 kHz +0.2 dB / -0.7 dB

Noise

Unweighted Output Unmuted

Weighted Output Muted

Gain (+4 dBu setting)

-101 dB

-109 dB

33.5 dB 35.5 dB 38.5 dB

Constant Sensitivity

Damping factor >150 >150 >150

3

N/A

3

N/A

400 W

400 W

325 W

800 W
600 W

4

NR

400 W

800 W

800 W

400 W

800 W

1200 W

1500 W
1600 W

4

NR

400 W

800 W

1600 W

2

Peak

1

500 W

625 W

900 W

1400 W

1200 W

5

5

2400 W

4

NR

4

NR

1300 W

2000 W

5

2500 W

1400 W

2400 W

3500 W

5

5

3500 W
5000 W

4

NR

1400 W

3000 W

5

5000 W

0.01 - 0.03%

0.03 - 0.06%

20 Hz - 15 kHz +/- 0.2 dB

20 Hz - 20 kHz +0.2 dB / -0.7 dB

-101 dB

-109 dB

Continuous

2

500 W

625 W

625 W

625 W

625 W

5

1250 W

NR

NR

5

4

4

115 0 W

5

5

1250 W
1250 W

5

5

115 0 W

2000 W

2500 W

5

5

2500 W
2500 W

4

NR

5

5

115 0 W

2500 W

5

2500 W

5

1

Peak

1000 W

125 0 W

1200 W

2000 W

1600 W

4000 W

4

NR

4

NR

125 0 W

2400 W
4000 W

1400 W

2500 W

4500 W

4500 W
7500 W

4

NR

1600 W

3000 W

5300 W

Continuous

2

1000 W

125 0 W

115 0 W

125 0 W

625 W

5

2250 W

NR

NR

5

4

4

1200 W

5

5

2250 W
2100 W

5

5

115 0 W

2400 W

4100 W

5

5

4200 W
4200 W

4

NR

5

5

115 0 W

2300 W

5

4200 W

5

0.01 - 0.03%

0.03 - 0.06%

20 Hz - 15 kHz +/- 0.2 dB

20 Hz - 20 kHz +0.2 dB / -0.7 dB

-101 dB

-109 dB

Input impedance >10 k, balanced or unbalanced >10 k, balanced or unbalanced >10 k, balanced or unbalanced

Maximum input level

(+14 dBu setting)

(+4 dBu setting)

4.24 V (+15 dBu)

1.7 V (+7 dBu)

4.24 V (+15 dBu)

1.7 V (+7 dBu)

4.24 V (+15 dBu)

1.7 V (+7 dBu)

Front Panel Controls and Indicators Power • Channel MUTE Buttons • Channel SELECT Buttons • Channel Input Signal and CLIP LED Indicators •

Channel Output and LIMIT LED Meters • HOME, ENTER, EXIT, GAIN Buttons • Control Knob

Rear Panel Controls and Indicators AC Power Disconnect Switch

Input Connectors

Line

GPI

3-pin Euro-style

2-pin Euro-style 3.5 mm

Output Connectors

Loudspeakers

GPIO

8-pin Euro-style

3-pin Euro-style 3.5 mm

Amplifi er and Load Protection Short circuit, open circuit, thermal, RF protection. On/Off muting, DC fault shutdown, active inrush limiting

AC Power Input Universal power supply 100 - 132/200-

Universal Power Supply 100 - 240 VAC, 50 - 60 Hz

240 VAC, 50 – 60 Hz

TD-000367 -01 -B

31

Dimensions (HWD) 3.5” x 19” x 12” (89 x 482 x 305 mm) 3.5” x 19” x 16” (89 x 482 x 406 mm) 3.5” x 19” x 16” (89 x 482 mm x 406 mm)

Weight, Net / Shipping 18.5 lb (8.4 kg) / 22 lb (10.0 kg) 21.0 lb (9.5 kg) / 25 lb (11.3 kg) 22.0 lb (10.0 kg) / 26 lb (11.8 kg)

1 Peak Power – 20 ms 1 kHz sine burst, all channels driven

2 Continuous Power – EIA 1 kHz 1% THD, all channels driven

3 70V & 100V are available on CXD4.2 only when channels are bridged

4 NR – Not Recommended due to excessive current draw

5

BOLD

indicates optimal confi guration for the load and channel count

Heat Loss Charts

Heat losses are the thermal emissions from an amplifi er while it is operating. It comes from dissipated waste power—i.e., real AC power in minus audio
power out. Measurements are provided for various loads at idle, 1/8 of average full power, 1/3 of average full power, and full power, with all channels
driven simultaneously. For typical usage, use the idle and 1/8 power fi gures. This data is measured from representative samples; due to production
tolerances, actual heat emissions may vary slightly from one unit to another. Bridged mono into 8 ohms is equivalent to 4 ohms per channel; into 4
ohms is equivalent to 2 ohms per channel.

BTU/hr kcal/hr

Idle

CXD 4.2

CXD 4.3 225 57

CXD 4.5 286 72

180 46

Load per Channel 8 Ω 4 Ω 2 Ω 25V-70V-100V

BTU/hr kcal/hr BTU/hr kcal/hr BTU/hr kcal/hr BTU/hr kcal/hr

1/8th Power

CXD 4.2 432 109 476 120 597 150 nr nr

CXD 4.3 684 172 794 200 1040 262 nr nr

CXD 4.5 811 204 1144 288 1124 283 nr nr

1/3rd Power

CXD 4.2 849 214 873 220 1215 30 6 nr nr

CXD 4.3 983 248 1261 318 1869 471 nr nr

CXD 4.5 881 222 1708 430 1737 438 nr nr

Full Power

CXD 4.2 1352 341 1478 372 2120 534 nr nr

CXD 4.3 2498 629 2925 737 4198 1058 nr nr

CXD 4.5 3116 785 5318 1340 4208 1060 nr nr

Idle

Thermal loss at idle or with very low signal level.

1/8 Power

Thermal loss at 1/8 of full power is measured with pink noise. It approximates operating with music or voice with light clipping and represents the
amplifi er's typical "clean" maximum level, without audible clipping. Use these fi gures for typical maximum level operation.

1/3 Power

Thermal loss at 1/3 of full power is measured with pink noise. It approximates operating with music or voice with very heavy clipping and a very
compressed dynamic range.

Full Power

Thermal loss at full power is measured with a 1 kHz sine wave. However, it does not represent any real-world operating condition.

NOTE:

TD-000367 -01 -B

Specifi cations are subject to change without notice.

32

Mailing Address:

QSC, LLC

1675 MacArthur Boulevard

Costa Mesa, CA 92626-1468 USA

Telephone Numbers:

Main Number: [phone]

Sales & Marketing: [phone] or toll free (USA only) [phone]

Customer Service: [phone] or toll free (USA only) [phone]

Facsimile Numbers:

Sales & Marketing FAX: [phone]

Customer Service FAX: [phone]

World Wide Web:

www.qsc.com

E-mail:

[e-mail]

[e-mail]

© 2015 - 2016 QSC, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC, LLC in the U.S. Patent and Trademark offi ce and other countries.

Cerwin-Vega® is a registered trademark of Cerwin-Vega, Electro-Voice is a registered trademark of Telex Communications, JBL is a trademark of HARMAN International

Industries, Martin Audio is a registered trademark of Martin Audio Ltd., NEXO® is a registered trademark of NEXO SA., Peavey® is a registered trademark of Peavey Electronics

Corporation, YAMAHA is a registered trademark of Yamaha Corporation.

All other trademarks are the property of their respective owners.

http://patents.qsc.com