QSC Audio CXD4.2, CXD4.3, CXD4.5 User Manual

CXD Amplifiers

User Manual

CXD4.2 — 4 Channel, 1600 W Amplifier

CXD4.3 — 4 Channel, 2500 W Amplifier

CXD4.5 — 4 Channel, 5000 W Amplifier

TD-000367-00-A

*TD-000367-00*

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 flash 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 sufficient 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.

EN EN

• Keep these instructions.

• Heed all warnings.

• Follow all instructions.

• Do not use this apparatus near water.

• Clean only with a dry cloth.

• Do not block any ventilation opening. Install in accordance with the manufacturer's instructions.

• Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.

• 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 fit into your outlet, consult an electrician for replacement of the obsolete outlet.

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

• Only use attachments/accessories specified by the manufacturer.

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

• Refer all servicing to qualified 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.

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

• Adhere to all applicable, local codes.

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

TD-000367-00-A

2

FCC Statement

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.

RoHS STATEMENT

The QSC CXD4.2, CXD4.3 and CXD4.5 amplifiers are in compliance with European Directive 2002/95/EC – Restriction of Hazardous
Substances (RoHS).

The QSC CXD4.2, CXD4.3 and CXD4.5 amplifiers 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 Amplifiers

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。

X O O O O O

X O O 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.)

3

TD-000367-00-A

Warranty (USA only; other countries, see your dealer or distributor)

QSC Audio Products 3 Year Limited Warranty

QSC Audio Products, LLC (”QSC”) guarantees its products to be free from defective material and/or workmanship and will replace defective parts
and repair malfunctioning products under this warranty when the defect occurs under normal installation and use, provided the unit is returned to
our factory, one of our authorized service stations or an authorized QSC International Distributor via pre-paid transportation with a copy of proof
of purchase (i.e., sales receipt). This warranty provides that the examination of the return product must indicate, in our judgment, a manufacturing
defect. This warranty does not extend to any product which has been subjected to misuse, neglect, accident, improper installation, or where the
date code has been removed or defaced. QSC shall not be liable for incidental and/or consequential damages. This warranty gives you specific legal
rights. This limited warranty is freely transferable during the term of the warranty period. The warranty on QSC products is NOT VALID if the products
have been purchased from an unauthorized dealer/online e-tailer, or if the original factory serial number has been removed, defaced, or replaced in
any way. Damage to, or loss of any software or data residing on the product is not covered. When providing repair or replacement service, QSC will
use reasonable efforts to reinstall the product’s original software configuration and subsequent update releases, but will not provide any recovery or
transfer of software or data contained on the serviced unit not originally included in the product.

Customers may have additional rights, which vary from state to state or from country to country. In the event that a provision of this limited warranty is
void, prohibited or superseded by local laws, the remaining provisions shall remain in effect.

The QSC limited warranty is valid for a period of three (3) years from date of purchase in the United States and many (but not all)
other countries.

EN EN

For QSC warranty information in countries other than the United States, contact your authorized QSC international distributor. A list of QSC
International distributors is available at www.qsc.com.

To register your QSC product online, go to www.qsc.com and select ”Product Registration”. Other questions regarding this warranty can be answered
by calling, e-mailing or contacting your authorized QSC distributor.

Phone: [phone] within US and Canada, [phone] international, Email: [e-mail], Website: www.qsc.com.

TD-000367-00-A

4

Introduction

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

CXD amplifiers feature Flexible Amplifier Summing Technology (FAST). Depending on the model, 1600, 2500, or 5000 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. This flexibility allows CXD Series amplifiers 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-amplified 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 amplifiers use QSC’s third-generation class-D power amp design in combination with a custom power stage utilizing a new output
device. In addition, CXD amplifiers employ the proven PowerLight power supply in conjunction with Power Factor Correction (PFC) which aligns the
current waveform with the AC mains voltage waveform. PFC enables the CXD Series amplifiers to draw current from the wall in a more efficient and
controlled manner resulting in very high power from a single standard AC breaker. Additionally, the CXD Series amplifiers offer multi-stage sleep
modes saving energy when possible without sacrificing performance. The result is an exceptionally powerful and flexible platform that offers low
weight and efficiency.

With four channels of amplification 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 amplifier is a capable and sophisticated loudspeaker processor. Integration of processing and amplification means that the DSP
knows exactly what the amplifier is doing so dynamics processing can be far more accurate and effective. This approach employs both RMS and Peak
Limiters that allow the amplifier and loudspeaker to produce more output without being pushed to distortion or destruction.

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

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

With a dedicated front panel user interface, complete with LED meters and indicators, a 400 x 240 TFT color display, a rotary encoder and navigation
buttons, the CXD amplifiers provide an intuitive means to control the system.

Unpacking

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

Package Contents

1. Quick-Start Guide TD-000350-00

2. Warning Information Sheet TD-000420-00

3. CXD Amplifier

4. IEC AC Power Cord

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)

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

5

TD-000367-00-A

Features

Amplifier 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)

EN EN

4. Output Channel -10 dB Below Limiter Activation LEDs (Blue)

5. Output Channel -20 dB Below Clip LEDs (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

Amplifier Rear Panel

NOTE:

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

1 4 5 6 7 8 102 93

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

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

USB

HEARTBEAT
GPO

GPI

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

OUTPUTS TO SPEAKERS

+

CH A

­+

CH B

­+

CH C

­+

CH D

-

PARALLEL CHANNEL

COMBINING APPLICATIONS

SETTINGS CAN BE

T1

CONFIGURED FOR

70V, 100V AND

T2

200V DIRECT

OUTPUT.

T3

BRIDGED

T4

CH A+B

T1+T3

-

T5

CH C+D

T5

+

T7

-

T6

CH AB+CD

T7

+

T5

-

T1
T3

+

T7

-

T8

— Figure 2 —

6. Cooling fan

7. AC Power Switch

8. Locking IEC Power Connection

9. Rear Rack-mount Bracket (CXD4.3 and CXD4.5)

T1
T3

T5
T7

T1
T3
T5

T1
T3
T5
T7

CH ABC

CH ABCD

CH AB

+

T2

-

+

T4

-

CH CD

+

T6

-

+

T8

-

T2

-

+

T4

-

+

T6

-

+

+

T2

-

+

T4

-

+

T6

-

+

T8

-

5. One eight-pin Euro-style Loudspeaker Connector

TD-000367-00-A

10. Front Rack-mount Brackets

6

Amplifier Control

A

B

MUTE

SEL

MUTE

SEL

1

2

Off Mode

• Rear power switch is off, the amplifier is not operable. The power
switch is the AC Mains disconnect.

• The power button is not illuminated.

• Turn the power switch to on. The amplifier enters the mode it was in

when power was removed. The power button is illuminated based on
the mode.

• If GPI is enabled, the Off Mode button is disabled.

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 amplifier is fully operable; audio can pass.

• If GPI is enabled, the Run Mode button is disabled.

Standby Mode

• From Mute All or Run modes, press and hold the power button on
the front panel for two to three seconds.

• The power button illuminates solid red.

• The front panel LCD is off.

• The amplifier is not operable; audio will not pass.

• If GPI is enabled, the Standby Mode button is disabled.

Mute All Mode

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

• The power button flashes red.

• The outputs are muted and amplifiers are off.

• The front panel and DSP functionality are fully operable. Any changes

you make are saved and take effect in the Run Mode.

• If GPI is enabled, the Mute All Mode button is disabled.

OUTPUT

LIM

-10

-20

CLIP

SIG

INPUT

MUTE

SEL

3

C

D

MUTE

SEL

4

— Figure 3 —

HOME

ENTER

EXIT

GAIN

MASTER
CONTROL

ENTER Button

ENTER

• Navigates into the menu structure

• Enters the edit mode for adjusting parameters

• Confirms the changes you make, and exits the edit mode.

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 confirm any value
being edited and take you to the Home screen.

GAIN Button

GAIN GAIN

• Pressing the GAIN button from any screen takes you to the output
gain screen for the most recently accessed output channel.

• Pressing GAIN again confirms 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.

• The SEL buttons are active only when the LCD screen is on an input
or output parameter adjustment screen.

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

LIM LEDs

LIM

• Illuminates red when the Limiter is engaged.

-10 and -20 LEDs

-10 & -20

• Indicates the output level of the channel.

CLIP LEDs

CLIP

• Illuminates red when the input signal is being clipped.

SIG LEDs

SIG

• Illuminates blue when a signal is present.

Master Control Knob

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

• Adjusts parameters

7

TD-000367-00-A

CXD Amplifier Signal Flow

Preset # and Configuration

F1: A B C D

Preset # and Configuration

Input Settings Output Processing

1

Sensitivity

Sensitivity

Switch

Switch

2

Sensitivity

Sensitivity

Switch

Switch

3

Sensitivity

Switch

4

Sensitivity

Switch

A/D

A/D

A/D

A/D

Meter

Meter

Meter

Meter

Gain

Gain

Gain

Gain

Mixer

Mixer

Mixer

Mixer

Button

Actuated

Mute

Mute

Mute

Mute

High­pass

Filter

High­pass

Filter

High­pass

Filter

High­pass

Filter

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Crossover

Low­pass

Filter

Low­pass

Filter

Low­pass

Filter

Low­pass

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

Amp Config.

Meter

A

Meter

B

Meter

C

Meter

D

Set by

Preset or Wizzard

— Figure 4 —

EN EN

Screen Types

Informational

F1: A B C D

Home (Press HOME for more information)

Location and breadcrumbs

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

Full

A - FR

+1.5 dB

Full

B - FR

+3.5 dB

Full

C - FR

+1.5 dB

Full

D - FR

+1.5 dB

Channel Configuration
and Gain

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 confirm changes for various system parameters.
Use the ENTER button to edit and confirm 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.

121 V 7.2 AAC Voltage: AC Current:

Amp Status:

OK

— Figure 5 —

Menu

PRESETS

Preset Recall and Save

INPUTS

— Figure 6 —

F1: A B C D

Gn/Pol

Gain

-7.0 dB

— Figure 7 —

Polarity

POL+

Output

A

20 dB

-60 dB

AC Voltage and Current

Amplifier Status

Location and breadcrumbs

Empty area indicates no
selections above (CCW).

Current Menu Selection

Next Menu selection below
(CW)

Parameter being edited

Parameter not selected

Parameter selected

Gain

-7.0 dB

TD-000367-00-A

8

Menu Tree

Presets

Preset Recall

Preset Save

Preset Wizard

*For QSC Line Arrays only

Inputs

Input Sensitivity

Input Gain

Outputs

Mixer w/Noise & Tone

Mode (Lo-Z, 70V, 100V)

Spkr Processing

Crossover

PEQ

Delay

Limiter

Array Correction*

Load Speaker

Save Speaker

Utilities

Status

Amp ID

Display

Lockout

Password

GPIO

About Presets

The CXD amplifiers are preset driven. In order to get the most out of the amplifiers, an understanding of how presets work is essential. A Preset, in the
context of the CXD amplifiers, is a combination of amplifier configuration (inputs and outputs), DSP and loudspeaker assignments. When a preset is
recalled it can change the output routing and wiring and/or any of the DSP settings.

The CXD amplifiers come with 20 unchangeable factory presets, and 50 user-defined 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
configurations. Factory presets F10: thru F20: include basic settings along with the output configurations.

Creating User-defined Presets

A preset can be created in two ways, the first is to modify an existing preset, then save this as a new preset. The second is to use the Preset Wizard to
create a Preset from scratch.

Save As a New Preset

After selecting a starting preset, navigate through the Input and Output menus to select and modify the parameters needed for your system. After
modifying the parameters for each channel, return to the Preset menu and save your work. If you started with a user-defined preset, you can update
the preset you started with using the SAVE function or, you can use the SAVE AS function.

Preset Wizard

The Preset Wizard simplifies 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 amplifier configuration is selected and you are then
allowed to select and assign loudspeakers to each output.

NOTE:

"overwrites" some existing preset. The main difference is the SAVE function overwrites only the preset number you started with, and the
SAVE AS function allows you to save to a different user preset number and change the name.

By default, all 50 of the user-defined presets are configured the same as factory preset F1. Either method described above

9

TD-000367-00-A

Installation

The following steps are written in the recommended installation order.

Mount the CXD Amplifier

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

Depending on the depth of your rack, the Rear Rack Ear Support kit (FG-000031-00)
may be required for rack mounting. Refer to http://qsc.com/products/ under
Accessories for details.

CAUTION!:

ventilation openings, and that each side has a minimum of
2 cm clearance.

1. Use the proper fastening hardware (not included) to secure the amplifier in the rack. The CXD4.3 and CXD4.5 have four front and four rear
mounting tabs. The CXD4.2 has four front mounting tabs.

Be sure that nothing is blocking the front or rear

— Figure 8 —

EN EN

AC Mains

WARNING!:

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

The CXD amplifiers have a Universal power supply 100 – 240 VAC, 50 – 60 Hz, with an IEC
locking connector.

1. Connect the IEC AC cable between the amplifier rear AC connector and the AC source.

AC Power

NOTE:

If the amplifier has no audio for fifteen minutes, the amplifier stops switching. The amplifier returns to the Run mode the instant audio is
present.”

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

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

— Figure 9 —

TD-000367-00-A

10

Inputs

Connect the Audio Inputs

USB

ROUTABLE INPUTS

21 43

Unbalanced

Balanced

HEARTBEAT
GPO

GPI

— Figure 10 —

— Figure 11 —

— Figure 12 —

There are four three-pin Euro-style connectors labeled 1 through 4 providing the audio inputs on the CXD Amplifiers. 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. Connect the input source wires to the Euro-style connectors as shown. (Figure 11 and

Figure 12)

3. The CXD Series has the capability of routing the inputs to different outputs. Be sure that
the connections you make here match the configuration of the amplifier.

4. Plug the Euro-style audio connectors into the appropriate inputs on the rear of
the amplifier.

+

-

+

-

+

-

+

-

USB (Optional)

The USB cable (supplied) connects to a Mac or PC for use with the Amplifier Navigator
software. You can update the amplifier firmware, save and deploy configuration files, and
more. Refer to the Amplifier Navigator online help for details.

— Figure 13 —

GPIO/Heartbeat

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

• 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 amplifier. The amplifier 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 amplifier in
Standby mode, or placing the amplifier in Mute All mode, does not stop the heartbeat.

• GPO — The functionality of this general purpose output pin has not been determined as of the release of this document.

• GPI — This input is used to put the amplifier into Standby from a remote location. When the GPI is enabled in the Utilities menu, then is shorted to

ground, the amplifier goes into the Standby mode. The front-panel power button is disabled when GPI is enabled.

11

TD-000367-00-A

Outputs

High-Frequency

The CXD amplifiers have four configurable outputs. You can set the power, combine outputs (bridged and parallel), and adjust the DSP for each
output. When the output configuration of the amplifier changes, the output terminals, controlled by relays, change accordingly. Use the diagrams
shown in Figure 15 thru Figure 23 as a reference for wiring the loudspeakers.

Select the Output Configuration

The first step in configuring your amplifier is to select a Preset based on the loudspeakers being connected to the amplifier. You can use a factory
preset, and then adjust the parameters as needed, then save the configuration as a user-defined preset. In addition, you can use the "Preset Wizard"

on page 16 to create presets from the ground up. When the configuration is changed, all four channels are automatically muted.

F1: A B C D

F7: ABC D

M

ABC

M

D

Current Configuration

Selected Configuration

Input Mixer

Frequency Range color

Output Configuration

Input number

Sub-woofer

Low-Frequency

Frequency Range Color Codes

Mid-Frequency

Full Range

EN EN

— Figure 14 —

WARNING!:
the amplifier. Use caution not to touch these contacts. Turn off the AC Mains disconnect switch prior to making any connections.

IMPORTANT:

electrically. When configuring your amplifier, there are going to be some loudspeaker connections that are noted as being "electrically
the same point". In Figure 15, all four channels are in parallel with the "electrically the same" terminals jumpered as recommended. In

addition, you can connect one loudspeaker to each of the four output channel terminals, and the four loudspeakers are in parallel; in this
case you would not need to jumper the terminals. You can connect four loudspeakers to one channel's output terminals (i.e. T1 and T2),
and the four loudspeakers are in parallel; in this case you would want to jumper the terminals. In all of the examples below, the
"electrically the same" terminals are shown with jumpers installed.

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

QSC recommends that you connect jumpers between the output terminals where the terminals are the same points

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

2. Press and release the front-panel power button. The button flashes red, the amplifier is in Mute All mode.

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

The following is a list of configurations 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 Configurations

F9: ABCD

ABCD Parallel

The following are electrically
the same point
T1+, T3+, T5+, and T7+
T2-, T4-, T6-, and T8-

— Figure 15 —

12

TD-000367-00-A

F9: ABCD

M

ABCD

F8: AB+CD

F8: AB+CD

M

AB+CD

Two-Channel Configurations

F6: A+B C+D

F6: A+B C+D

AB Parallel
Bridged with
CD Parallel

The following are electrically
the same point
T1+and T3+
T5- and T7-

— Figure 16 —

A+B Bridged
C+D Bridged

M M

A+B

F5: AB C+D

F5: AB C+D

M M

AB

F4: AB CD

F4: AB CD

C+D

C+D

— Figure 17 —

AB Parallel
C+D Bridged

The following are electrically
the same point
T1+ and T3+
T2- and T4-

— Figure 18 —

AB Parallel
CD Parallel

M M

AB

CD

The following are electrically
the same point
T1+ and T3+
T5+ and T7+
T2- and T4­T6- and t8-

— Figure 19 —

13

TD-000367-00-A

F7: ABC D

F7: ABC D

ABC Parallel
D Single

M M

ABC

D

The following are electrically
the same point
T1+, T3+, and T5+
T2-, T4-, and T6-

— Figure 20 —

Three-Channel Configurations

F3: A+B C D

F3: A+B C D

M M M

EN EN

A+B C D

F2: AB C D

F2: AB C D

A+B Bridged
C Single
D Single

— Figure 21 —

AB Parallel
C Single
D Single

M

AB

Four-Channel Configuration

F1: A B C D

F1: A B C D

M M

A B

M

M

M

C

D

The following are electrically
the same point
T1+ and T3+
T2- and T4-

— Figure 22 —

A Single
B Single
C Single
D Single

M

C

D

— Figure 23 —

TD-000367-00-A

14

Connect the Loudspeakers

WARNING!:

When the AC Power is on, there is a potential of having
dangerous voltage at the output terminals on the rear of the amplifier. Use
caution to not touch these contacts. Turn off the AC Mains disconnect switch
prior to making any connections.

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

2. Connect the loudspeaker wiring to the 8-pin Euro-style connector. Refer to Figure 15
thru Figure 23. When combining channels, QSC recommends that you connect jumpers
between the electrically same output terminals. Refer to Figure 15 and the WARNING
above the figure.

3. Install the Euro-style connector onto the rear of the amplifier as shown in Figure 24.

4. Use a Phillips screwdriver to secure the connector.

AC Power On

— Figure 24 —

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

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

2. Turn on all audio sources.

3. Turn the AC Mains power switch on the back of the amplifier to ON. The amplifier starts in the state it was in when power was removed.

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

Power Distribution Charts

The following charts show the maximum power output for each channel in each configuration, and under different loads.

CXD 4.3 — Total Power: 2500W

8Ω Load 4Ω Load 2Ω Load

Configuration

4 CH (A B C D) 625 625 625 625 650 650 650 650 600 600 600 600
3 CH (AB C D) 1000 625 625 1200 650 650 1200 600 600
3 CH (A+B C D) 125 0 625 625 1150 650 650 625 600 600
2 CH (AB CD) 1000 1000 1200 1200 1200 1200
2 CH (AB C+D) 1000 1250 1200 1150 1200 625
2 CH (A+B C+D) 125 0 1250 1150 115 0 625 625
2 CH Alt (ABC D) 1100 625 2000 650 2500 600
1 CH (ABCD) 1100 2100 2500
1 CH (AB+CD) 2500 2370 2230

A B C D A B C D A B C D

— Table 1 —

CXD 4.5 — Total Power: 5000W

8Ω Load 4Ω Load 2Ω Load

Configuration A B C D A B C D A B C D
4 CH (A B C D) 1150 115 0 1150 1150 125 0 125 0 125 0 125 0 625 625 625 625
3 CH (AB C D) 1200 1150 1150 2250 125 0 125 0 2100 625 625
3 CH (A+B C D) 2250 115 0 115 0 115 0 12 50 125 0 625 625 625
2 CH (AB CD) 1200 1200 2250 2250 2100 2100
2 CH (AB C+D) 1200 2250 2250 1150 2100 625
2 CH (A+B C+D) 2250 2250 115 0 1150 625 625
2 CH Alt (ABC D) 115 0 1150 2400 12 50 4100 625
1 CH (ABCD) 115 0 2300 4200
1 CH (AB+CD) 4200 4250 2250

— Table 2 —

15

TD-000367-00-A

Preset Wizard

Enter Load Profile (Impedance and Power)

output channels

OUTPUTS SPEAKERS S AV E

Assign

AssignAssign

Output:

A DCB

Imped:

8.0 8.08.08.0

Spkr:

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

Assign

Power:

625 625625625

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

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

To Assign a loudspeaker, press

Continue to Step 3.

Scroll to select Output channel

ENTER

OUTPUTS SPEAKERS S AV E

Output:

A

ASSIGN

2-Way LF

Speaker:

80 Hz

Band:

WL2102 BiLFNS

Filter:

Scroll to select a Speaker model

To edit Speaker, press

ENTER

Scroll to select (Band, Filter)

To confirm, press

ENTER

Turn to adjust parameter

ENTER

To edit, press

To confirm, press

ENTER

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

Scroll to select ASSIGN

ENTER

To assign the speaker to the output channel, press

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 "Specifications" on page 28.

HOME > PRESETS > PRESET WIZARD > ENTER

Step 1 —

EN EN

Adjust Impedance and Power

OUTPUTS SPEAKERS SAV E

Output:

Imped:

Power:

Remaining Power Available: 1875 W

A B C D

8.0 - - - - - -

625 - - - - - -

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

Default = 8 Ω

Default = min. for amp

Impedance and Power
are dynamically linked
for adjustments.

Possible Output Mode Combinations using the Preset Wizard

B

A

- - -

- - -

25%

25%

*

C

- - -

25%

D

- - -

25%

AB

- - -

50%

C

- - -

25%

D

- - -

25%

AB

- - -

50%

CD

- - -

50%

A+B

- - -

50%

C

- - -

25%

D

- - -

25%

Scroll to select (Imped or Power)

To edit, press

Turn to adjust parameter

To confirm, press

Repeat for remaining

D

A+B

- - -

50%

C+D

- - -

50%

ABC

- - -

75%

- - -

25%

AB + CD

- - -

100%

ENTER

ENTER

ABCD

- - -

100%

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

* Precentages are used to represent the power for different amplifier models.

Step 2 —

Step 3 —

Select Output Channel for Speaker Assignment

Select Speaker Type for Channel

TD-000367-00-A

— Figure 25 —

16

Step 4 —

Edit preset number or press EXIT

User Preset Number:

21

SAVE

New Preset Name

C o n f i g - A

OUTPUTS SPEAKERS SAVE

Scroll to the Save screen

To edit User Preset number, press

ENTER

When you have finished
selecting loudspeakers,
continue to scroll to
access the SAVE tab.

Turn to adjust parameter

To confirm, press

ENTER

A B C D

M M M M

F1: A B C D

F1: A B C D

Indicates more Presets

Input Sub MF FullHFLF

Scroll to desired Preset

20 Factory, 50 User-defined

F1: A B C D

The message at the bottom changes to: “Recalling Preset now...”

Save Wizard Preset

Create New Preset from an Existing Preset

To create a preset from an existing preset, recall the preset with the desired output configuration, 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 configuration, input parameters, and loudspeaker profiles (DSP, load, and assignments). There are 20 factory presets
that can be recalled, but not overwritten. Factory presets F1: Config thru F9: Config contain output configurations only. Factory presets F10: thru F20:
contain the output configurations and basic DSP for the configurations. There are 50 user presets that can be recalled and overwritten.

HOME > PRESETS > PRESET RECALL > ENTER

Step 1 —

Select Preset

Step 2 —

Confirm Selection

F18: 3-Way

M M M

Press ENTER to confirm selection

A+B

To select the Preset conguration, press

To conrm the selection, press

C D

You may hear relays clicking

17

ENTER

ENTER

TD-000367-00-A

Set up the Inputs

Press ENTER to confirm

Press ENTER to confirm

NOTE:

Changes made to input levels are in real time.

HOME > INPUTS > INPUT SENS > ENTER

Step 1 —

Select Input Sensitivity

F1: A B C D

Inputs > Input Sens

INPUT SENS

+14 dBu

Input

1

Scroll to select (+14 or +4 dBu)

(The background turns to green.)

To confirm selection, press

To move to the next input, press

ENTER

SEL

Repeat procedure for

remaining input channels.

HOME > INPUTS > INPUT GAIN > ENTER

Step 2 —

Set Input Gain

EN EN

F1: A B C D

Inputs > Input Gain

INPUT GAIN

-11.8 dB

Input

1

Scroll to select (-100 thru 20 dB)

(0.1 dB increments)

To confirm selection, press

To move to the next input, press

ENTER

SEL

Set up the Outputs

NOTE:

Mixer

The CXD amplifiers are equipped with an internal mixer that allows you to
adjust the signals from each input to each of the four outputs. Figure 26 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 one channel is mixed to each output: 1 - A, 2 - B, 3 - C, 4 - 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.

Repeat procedure for

remaining input channels.

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

Output

A

TD-000367-00-A

18

— Figure 26 —

HOME > OUTPUTS > MIXER > ENTER

Press ENTER to confirm

Step 1 —

Set Mixer Gains

F1: A B C D

MIXER

Input 1

4.2

Mode Select

HOME > OUTPUTS > MODE > ENTER

Step 2 —

Select the Output Mode

F1: A B C D

Outputs > Mode

MODE SELECT

Low-Z, 70V, 100V

Input 2

-100.0

Input 3

2.7

Mode:

Low-Z

Output

Input 4

-100.0

Output

A

Adjust the Mixer Gain for the selected Input

To confirm, press

ENTER

Scroll to remaining Inputs and repeat

After confirming all settings, press

To move to the next output, press

A

EXIT

SEL

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

To confirm selection, 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-defined loudspeaker then make any adjustments needed, and save the changes as a user-defined 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 Profile

A loudspeaker profile 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 modifications and save your
new profile, or you can build the profile without loading a loudspeaker, and then save it as a new profile. If you load a QSC loudspeaker, the amplifier
is set for that specific 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 27. There may be additions to this list in the futrue that can be loaded with firmware updates.

NOTE:

you made are overwritten.

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

19

TD-000367-00-A

HOME > OUTPUTS > SPKR PROC > LOAD SPKR > ENTER

Step 1 —

Load an Existing Loudspeaker for the Selected Output

ABOUT SPEAKERS LOAD

A

Speaker:

Band:

Filter:

Output:

WL2102 BiLFNS

2-Way LF

80 Hz

CONFIRM

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

To edit Speaker, press

Scroll to select Speaker model

To confirm, press

Scroll to (Band, Filter)

To adjust, press

Adjust selected parameter

To confirm, press

ENTER

ENTER

ENTER

ENTER

Scroll to LOAD

To Load the speaker profile to the selected output, press

ENTER

Crossover

EN EN

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

Step 1 —

Set the Crossover High- and/or Low-pass filters

F1: A B C D

HPF

Freq

70.0

Type

BWrth

Output

Slope

24dB/oct

Freq: 20 - 20 kHz

A

20 dB

Type:

• Butterworth

• Linkwitz-Riley,

• Bessel-Thomson

Slope:

-60 dB

6dB to 48dB/oct
depending on Type

Scroll to select (Freq, Type, Slope)

To edit, press

Turn to adjust parameter

To confirm, press

To exit, press

ENTER

ENTER

EXIT

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

Step 2 —

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

+
Gain -100 to +20 dB
–

Polarity + or -

Scroll to select (Gain or Polarity)

To edit, press

Turn to adjust parameter

To confirm, press

To exit, press

ENTER

ENTER

EXIT

TD-000367-00-A

20

EQ

Type: Bypass, Parametric, Low Shelf,

Press ENTER to confirm

HOME > OUTPUTS > SPKR PROC > PEQ > BAND 1, 2, 3, 4, OR 5 > ENTER

The graph is a composite of all five 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

Type

Parametrc

Gain

-35 dB

Delay

HOME > OUTPUTS > SPKR PROC > DELAY > ENTER

Step 1 —

Set the Output Delay Time

F1: A B C D

Outputs > Spkr Proc > Delay

DELAY TIME

14.0 ms

Bypassed

Output

A

20 dB

-60 dB

Freq
100BW.01

Output

A

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.)

Delay:

0.0 ms to

50.00 ms

1.0 ms increments

Bypass:
Bypassed or
Enabled

Scroll to select

(Type, Gain, Freq, BW)

To edit, press

Turn to adjust parameter

To confirm, press

To exit, press

Scroll to (Delay Time or Bypass)

To edit, press

Turn to adjust parameter

To confirm, press

To exit, press

ENTER

ENTER

EXIT

ENTER

ENTER

EXIT

Limiter

HOME > OUTPUTS > SPKR PROC > LIMITER > ENTER > ENTER

Step 1 —

Set the Limiter Mode

F1: A B C D

AUTO

Type

Med

SpkrPwr

200W

Output

SpkrImp

8.0

A

To edit the Limiter mode, press

ENTER

Turn to select the mode for the Limiter

AUTO

ADV

To confirm setting, press

OFF

ENTER

21

TD-000367-00-A

HOME > OUTPUTS > SPKR PROC > LIMITER > AUTO

Scroll to select (RMSThr, PkThr,

NOTE:

SpkrPwr maximum output depends on the amplifier and the output configuration 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 amplifier.

Step 2 —

Set the AUTO Mode Parameters

F1: A B C D

AUTO

Type
Med

SpkrPwr

200W

Output

A

SpkrImp

8.0

Type:
Aggressive
Medium
Mild

SpkrPwr:

10.0 W to 1250 KW

SpkrImpd:

2.0 Ω to 32.0 Ω

Scroll to select (Type, SpkrPwr, SpkrImp)

To edit, press

Turn to adjust parameter

To confirm, 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.

EN EN

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.

HOME > OUTPUTS > SPKR PROC > LIMITER > ADV

Step 3 —

Set the ADV Mode Parameters

F1: A B C D

ADV

RMSThr

100.0V

Array Correction

NOTE:

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

HOME > OUTPUTS > SPKR PROC > ARRAY > ENTER

Step 1 —

Set Splay Angle and Number of Boxes in the Array

F1: A B C D

Splay Angle: Total cumlative
angle of the array.

Array Length: Total number of
boxes in the array.

AC

Angle

15.0

PkThr

155.0V

Boxes #

4

Output

A

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

PkAttk, PkRel, RMSAttk, & RMSRel)

Turn to adjust parameter

Scroll to select (Angle or Boxes#)

Angle:

0.0˚ to 90.0˚

Boxes #:
0 to 24

Turn to adjust parameter

To edit, press

To confirm, press

To exit, press

To edit, press

To confirm, press

To exit, press

ENTER

ENTER

EXIT

ENTER

ENTER

EXIT

TD-000367-00-A

22

HOME > OUTPUTS > SPKR PROC > SAVE SPKR > ENTER

Scroll to select (Band,

Edit preset number or press EXIT

U1: A B C D

User Preset Number:

21

SAVE

New Preset Name

C o n f i g - A

Turn to select desired number (1 thru 50)

To confirm User Preset Number, press

ENTER

To edit User Preset number, press

ENTER

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

Step 1 —

Step 2 —

Save a Loudspeaker with Custom Load Profile

ABOUT SPEAKERS SAVE

Output Data:

Band: 2-Way LF

Power Rating:

Enter Speaker Info

AB + CD

16.0Nominal Imped:

1000

Name the Loudspeaker Profile

SPEAKERSABOUT

Speaker Profile Name

M y S p k r

SAV E

SAVE

Press ENTER to edit name

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

After confirming settings, Scroll to SAVE

Indicates editing

Indicates “Speaker
Profile Name”
is selected

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

Scroll to desired letter position press

Turn to select desired character press

When finished, scroll to SAVE press

Nominal Imped, Power Rating)

To edit, press

Turn to adjust parameter

To confirm, press

To add Speaker Profile Name, press

ENTER

ENTER

ENTER

ENTER

ENTER

ENTER

Save the Preset

After modifying the Inputs and Outputs for all channels, save the current settings as one of the 50 user-defined 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-defined 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.

HOME > PRESETS > PRESET SAVE> SAVE AS > ENTER

Step 1 —

Save a New Preset - Select and Edit Preset Number

23

TD-000367-00-A

Step 2 —

Press ENTER to edit preset name

U1: A B C D

User Preset Number:

21

SAVE

New Preset Name

C o n f i g X A

Scroll to New Preset Name

press

ENTER

Scroll to desired letter position

press

ENTER

Turn to select desired character

press

ENTER

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

Indicates “New
Preset Name”
is selected

Indicates editing

Press ENTER to save preset

U1: A B C D

User Preset Number:

21

SAVE

New Preset Name

C o n f i g X A

Press

ENTER

When you are finished naming, press

EXIT

Scroll to SAVE

SAVE

To confirm Save, press

ENTER

Press ENTER to save preset

U1: A B C D

SAVE

To save, press

To exit without saving, press

EXIT

ENTER

To confirm the save, press

ENTER

Name the Preset

Step 3 —

Save Preset

EN EN

HOME > PRESETS > PRESET SAVE > SAVE > ENTER

Use this 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.

Step 1 —

Overwrite Preset

TD-000367-00-A

24

Utilities

To enter “Current Password:”, press

The Utilities section provides the following amplifier information and functionality:

HOME > UTILITIES > STATUS > ENTER

Check the Amplifier'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

HOME > UTILITIES > AMP ID > ENTER

Name the Amplifier

UTILITY - AMP ID

Serial #: 123abc Amp ID: my amp ID

Change Amp ID to:

m y a m p I D

CONFIRM

Temperature:

CH1 & CH3: 27C

CH2 & CH3: 29C

Power Supply: 24C

Amp Total Run Time:
HH:MM:SS

Hardware version

Firmware version
update thru Amplifier Navigator

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

To edit “Change Amp ID to:”, press

Indicates editing

Indicates “New
Preset Name”
is selected

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

Scroll to desired letter position

Turn to select desired character

Temperature (CXD 4.3 & 4.5)
Thermal Limiting starts at 69ºC
Thermal Shutdown at 80ºC

ENTER

press

press

When you are finished, press

ENTER

ENTER

EXIT

Scroll to CONFIRM

Press

ENTER

HOME > UTILITIES > PASSWORD > ENTER

Add or Change the Password

UTILITY - CHANGE PASSWORD

Current Password:

Q S C

New Password:

M Y p a s w os r

CONFIRM

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

With the first letter position selected, press

Turn to select desired character

When you complete the current password,

the “New Password:” is automatically selected

Repeat the procedure for the “New Password:”

press

Scroll to CONFIRM

Press

ENTER

ENTER

ENTER

ENTER

25

TD-000367-00-A

HOME > UTILITIES > LOCKOUT > ENTER

With “Enter Password:” selected, press

All controls are locked except the Mute buttons, the front-panel and rear power buttons, the Enter button and Master Control knob to unlock the amplifier.

Enter Password to Lock or Unlock

UTILITY - LOCKOUT

Enter Password:

m y p a s w os r

CONFIRM

With the first letter position selected

Scroll to desired character

When you complete the password correctly,

press

press

ENTER

ENTER

ENTER

CONFIRM is automatically selected.

To lock or unlock the amplifier, press

ENTER

GPIO Connections

Step 1 —

EN EN

HOME > UTILITIES > GPIO > ENTER

Step 2 —

Connect 3-pin and 2-pin Euro-style Connectors on the Back Panel of the Amplifier

Heartbeat
GPO

Heartbeat

GPO

— 1 Hz square wave @ 3.3 V output

— Functionality is to be added.

GPI

GPI

— Standard logic trigger with 1.5 V threshold.
Short pin 1 to ground to put amplifier in Standby mode. GP Input must be Enabled.
(Switch is not included.)

Enable or Disable the GP Input Feature

UTILITY - GPIO

GP INPUT:

Enable

Disable

DISABLED

Current status

Scroll to Enable or Disable

To confirm your selection, Press

Enable button
selected

Disable button
not selected

After pressing ENTER, the LCD

returns to the HOME page.

ENTER

TD-000367-00-A

26

Supported Loudspeakers

QSC Audio

AP-5102
AP-5122
AP-5122m FOH
AP-5122m MON
AP-5152
GP118-sw
GP212-sw
GP218-sw
S8T
S10T
S12
WL118-sw
WL-2102
WL212-sw
WL218-sw

B52

LX1515V3
LX18V3
MX1515
MX18S

Cerwin-Vega (CV)

EL-36C
TS-42

EV

JBL

ELX112
ELX115
ELX215
TX2152
TX2181

JRX112M
JR X115
JR X118S
JRX125
MRX515
MRX518S
MRX525
MRX528S
PRX415M
PRX425
SRX712M
SRX715
SRX718S
SRX722
SRX725
SRX728S
SRX738
VRX932LA

Peavey

PR10
PR12
PR15
PV115
PV118
PV12M
PV215
PVX12
PVX15
SP218
SP4

Yamaha

BR12
BR12M
BR15
C115V
S115V
S215V
SM15V
SW218V

27

TD-000367-00-A

Specifications

CXD4.2 CXD4.3 CXD4.5

8Ω
4Ω
2Ω

8Ω
4Ω
2Ω

8Ω
4Ω
2Ω
1Ω

8Ω
4Ω

1

400 Watts
400 Watts
325 Watts

1

800 Watts
800 Watts
650 Watts

1

1600 Watts
1600 Watts
1600 Watts
1600 Watts

0.01 - 0.03%

0.03 - 0.06%

625 Watts
625 Watts
625 Watts

1250 Watts
1200 Watts
1200 Watts

2500 Watts
2500 Watts
2500 Watts
2500 Watts

0.01 - 0.03%

0.03 - 0.06%

1150 Watts
1250 Watts
625 Watts

2250 Watts
2250 Watts
2100 Watts

4200 Watts
4200 Watts
4250 Watts
3700 Watts

0.01 - 0.03%

0.03 - 0.06%

4 Ch. Continuous

2 Ch. Continuous

1 Ch. Continuous

Typical Distortion

EN EN

Maximum Distortion 4Ω - 8Ω 1.0% 1.0% 1.0%

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

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

Noise

Unweighted Output Unmuted
Weighted Output Muted

-101 dB

-109 dB

20 Hz - 15 kHz +/- 0.2 dB
20 Hz - 20 kHz +0.2 dB / -0.7 dB

-101 dB

-109 dB

20 Hz - 15 kHz +/- 0.2 dB
20 Hz - 20 kHz +0.2 dB / -0.7 dB

-101 dB

-109 dB

Gain (1.2V setting) 34.0 dB 38.4 dB 38.4 dB

Damping factor >15 0 >15 0 >15 0

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

Maximum input level

(3.9V setting)
(1.2V setting)

Controls and indicators (front) Power•ChannelMUTEButtons•ChannelSELECTButtons•ChannelInputSignalandCLIPLEDIndicators•ChannelOutputand

Controls and indicators (rear) AC Power Disconnect AC Power Disconnect AC Power Disconnect

Input connectors

Line Input
GPI Input

Output connectors

Loudspeaker Output
GPIO Output

Amplifier and load protection Short circuit, open circuit, thermal, RF protection. On/Off muting, DC fault shutdown, active inrush limiting, input current limiting

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

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 482mm x 406mm)

12.28V (+24 dBu)

3.88V (+14 dBu)

LIMITLEDMeters•HOME,ENTER,EXIT,GAINNavigationButtons•ControlKnob

3-pin Euro-style
2-pin Euro-style 3.5 mm

8-pin Euro-style
3-pin Euro-style 3.5 mm

12.28V (+24 dBu)

3.88V (+14 dBu)

3-pin Euro-style
2-pin Euro-style 3.5 mm

8-pin Euro-style
3-pin Euro-style 3.5 mm

12.28V (+24 dBu)

3.88V (+14 dBu)

3-pin Euro-style
2-pin Euro-style 3.5 mm

8-pin Euro-style
3-pin Euro-style 3.5 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 - 1.0 kHz sine wave, 1% THD, 1 channel driven

TD-000367-00-A

28

Heat Loss Charts

Heat losses are the thermal emissions from an amplifier 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 figures. 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 4.3 225 57
CXD 4.5 286 72

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

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

1/8th Power

CXD 4.3 684 17 2 794 200 1040 262 794 200
CXD 4.5 811 204 1144 288 112 4 283 1144 288

1/3rd Power

CXD 4.3 983 248 1261 318 1869 471 1261 318
CXD 4.5 881 222 17 0 8 430 1737 438 17 08 430

Full Power

CXD 4.3 2498 629 2925 737 4198 10 5 8 2925 737
CXD 4.5 3116 785 5318 134 0 4208 1060 5318 134 0

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
amplifier's typical "clean" maximum level, without audible clipping. Use these figures 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.

29

TD-000367-00-A

Mailing Address:

QSC Audio Products, 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]

© 2013 QSC Audio Products, LLC. All rights reserved. QSC and the QSC logo are registered trademarks of QSC Audio

Products, LLC in the U.S. Patent and Trademark office and other countries.

All other trademarks are the property of their respective owners.

http://patents.qsc.com.