QSC Audio CXD4.2 Manuel utilisateur

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*

2

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TD-000367-00-A

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.

• 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.

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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)

有毒有害物质或元素

(Toxic or hazardous Substances and Elements)

铅

(Pb)

汞

(Hg)

镉

(Cd)

六价铬

(Cr(vi))

多溴联苯

(PBB)

多溴二苯醚

(PBDE)

电路板组件

(PCB Assemblies)

X O O O O O

机壳装配件

(Chassis Assemblies)

X O O O O O

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。

(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.)

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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.

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: 1-800-854-4079 within US and Canada, +1-714-754-6175 international, Email: [email protected], Website: www.qsc.com.

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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

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

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)

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Features

Ampliﬁer Front Panel

— Figure 1 —

1

2

3

4

5

6

7

8

12

13

14

15

16

9

10

11

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 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:

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

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

— Figure 2 —

CH AB

T1+

T3+

T2-

T4-

CH CD

T5+

T7+

T6-

T8-

CH ABC

T1

+

T3+

T5+

T2-

T4-

T6-

CH ABCD

T1

+

T3+

T5+

T7+

T2-

T4-

T6-

T8-

CH AB+CD

T1

+

T3+

T5-

T7-

CH C

+

D

T5+

T7-

CH A

+

B

T1+ T3-

BRIDGED

OUTPUTS TO SPEAKERS

CH A

CH D

CH C

CH B

+

-

T1

T4

T3

T2

T5

T8

T7

T6

SETTINGS CAN BE

CONFIGURED FOR

70V, 100V AND

200V DIRECT

OUTPUT.

PARALLEL CHANNEL

COMBINING APPLICATIONS

THIS PRODUCT SHOULD BE SUPPORTED ON ALL

FOUR CORNERS WHEN INSTALLED IN A RACK

USB

HEARTBEAT

GPO

GPI

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

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 (CXD4.3 and CXD4.5)

10. Front Rack-mount Brackets

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Ampliﬁer Control

— Figure 3 —

OUTPUT

HOME

MASTER

CONTROL

-10

-20

LIM

SEL

MUTE

A

1

SEL

MUTE

B

2

SEL

MUTE

C

3

SEL

MUTE

D

4

CLIP

SIG

INPUT

ENTER

EXIT

GAIN

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.

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

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

EXIT Button

• 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

• 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

• 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

• 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

• Illuminates red when the Limiter is engaged.

-10 and -20 LEDs

• Indicates the output level of the channel.

CLIP LEDs

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

SIG LEDs

• Illuminates blue when a signal is present.

ENTER

EXIT

HOME

GAIN GAIN

SEL SEL

LIM

-10 & -20

CLIP

SIG

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CXD Ampliﬁer Signal Flow

Screen Types

— Figure 5 —

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

Full

+1.5 dB

A - FR

+1.5 dB

C - FR

Full

+1.5 dB

D - FR

Full

121 V 7.2 AAC Voltage: AC Current:

Home (Press HOME for more information)

+3.5 dB

B - FR

Full

Amp Status:

OK

Preset # and Configuration

Location and breadcrumbs

Channel Configuration

and Gain

AC Voltage and Current

Amplifier Status

— Figure 6 —

Preset Recall and Save

Menu

PRESETS

INPUT S

F1: A B C D

Preset # and Configuration

Location and breadcrumbs

Current Menu Selection

Empty area indicates no

selections above (CCW).

Next Menu selection below

(CW)

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.

— Figure 7 —

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.

Gain

-7.0 dB

Gn/Pol

F1: A B C D

Polarity

POL+

Output

A

20 dB

-60 dB

Gain

-7.0 dB

Parameter being edited

Parameter not selected

Parameter selected

— Figure 4 —

Input Settings Output Processing

Gain

1

4

3

2

Mute

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Gain /

Polarity

Low-

pass

Filter

Mixer

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

Sensitivity

Switch

A/D

Meter

5-Band

PEQ

5-Band

PEQ

5-Band

PEQ

5-Band

PEQ

Delay

Meter

D/A

Crossover

Button

Actuated

Amp Config.

A

D

B

C

Set by

Preset or Wizzard

RMS

Peak

Limiter

RMS

Peak

Limiter

RMS

Peak

Limiter

RMS

Peak

Limiter

Low-

pass

Filter

Low-

pass

Filter

Low-

pass

Filter

High-

pass

Filter

High-

pass

Filter

High-

pass

Filter

High-

pass

Filter

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Menu Tree

*For QSC Line Arrays only

Presets

Preset Wizard

Preset Recall

Preset Save

Inputs

Input Sensitivity

Input Gain

Outputs

Mixer w/Noise & Tone

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

Save Speaker

Load Speaker

Array Correction*

Limiter

Delay

PEQ

Crossover

Spkr Processing

Utilities

Display

Status

Amp ID

Password

Lockout

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:

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

"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.

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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!:

Be sure that nothing is blocking the front or rear

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.

AC Mains

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 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.

— Figure 8 —

— Figure 9 —

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Inputs

Connect the Audio Inputs

— Figure 10 —

HEARTBEAT

GPO

GPI

USB

ROUTABLE INPUTS

21 43

— Figure 11 —

Unbalanced

— Figure 12 —

Balanced

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.

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.

— Figure 13 —

+

-

+

-

+

-

+

-

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Outputs

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.

— Figure 14 —

F1: A B C D

F7: ABC D

M

ABC

M

D

Input number

Sub-woofer

Mid-Frequency

Full Range

High-Frequency

Low-Frequency

Current Configuration

Selected Configuration

Input Mixer

Output Configuration

Frequency Range color

Frequency Range Color Codes

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

IMPORTANT:

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

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.

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

— Figure 15 —

F9: ABCD

ABCD Parallel

M

ABCD

The following are electrically

the same point

T1+, T3+, T5+, and T7+

T2-, T4-, T6-, and T8-

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— Figure 16 —

F8: AB+CD

AB Parallel

Bridged with

CD Parallel

The following are electrically

the same point

T1+and T3+

T5- and T7-

M

AB+CD

Two-Channel Conﬁgurations

— Figure 17 —

F6: A+B C+D

A+B Bridged

C+D Bridged

A+B

C+D

M M

— Figure 18 —

F5: AB C+D

AB Parallel

C+D Bridged

AB

C+D

M M

The following are electrically

the same point

T1+ and T3+

T2- and T4-

— Figure 19 —

F4: AB CD

The following are electrically

the same point

T1+ and T3+

T5+ and T7+

T2- and T4-

T6- and t8-

AB Parallel

CD Parallel

AB

CD

M M

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— Figure 20 —

F7: ABC D

ABC

D

M M

The following are electrically

the same point

T1+, T3+, and T5+

T2-, T4-, and T6-

ABC Parallel

D Single

Three-Channel Conﬁgurations

— Figure 21 —

F3: A+B C D

A+B Bridged

C Single

D Single

A+B C D

M M M

— Figure 22 —

F2: AB C D

AB Parallel

C Single

D Single

M

AB

M

C

M

D

The following are electrically

the same point

T1+ and T3+

T2- and T4-

Four-Channel Conﬁguration

— Figure 23 —

F1: A B C D

A Single

B Single

C Single

D Single

M M

A B

M

C

M

D

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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

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

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

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) 1250 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) 1250 1250 1150 1150 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

— 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 1150 1150 1150 1250 1250 1250 1250 625 625 625 625

3 CH (AB C D) 1200 1150 1150 2250 1250 1250 2100 625 625

3 CH (A+B C D) 2250 1150 1150 1150 1250 1250 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 1150 1150 625 625

2 CH Alt (ABC D) 1150 1150 2400 1250 4100 625

1 CH (ABCD) 1150 2300 4200

1 CH (AB+CD) 4200 4250 2250

— Table 2 —

— Figure 24 —

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Preset Wizard

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 —

Adjust Impedance and Power

OUTPUTS SPEAKERS SAVE

A B C D

Output:

8.0 - - - - - -

Imped:

625 - - - - - -

Power:

Remaining Power Available: 1875 W

Enter Load Profile (Impedance and Power)

Default = 8 Ω

Default = min. for amp

Adjust Impedance based on

the total loudspeaker load

connected to the channel.

Scroll to select (Imped or Power)

To edit, press

ENTER

Repeat for remaining

output channels

To confirm, press

ENTER

Turn to adjust parameter

Impedance and Power

are dynamically linked

for adjustments.

— Figure 25 —

Possible Output Mode Combinations using the Preset Wizard

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

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

- - -

B

25%

A

- - -

25%

D

- - -

25%

C

- - -

25%

AB

- - -

50%

D

- - -

25%

C

- - -

25%

CD

- - -

50%

AB

- - -

50%

A+B

- - -

50%

D

- - -

25%

C

- - -

25%

D

- - -

25%

ABC

- - -

75%

ABCD

- - -

100%

AB + CD

- - -

100%

A+B

- - -

50%

C+D

- - -

50%

*

Step 2 —

Select Output Channel for Speaker Assignment

OUTPUTS SPEAKERS SAVE

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

Step 3 —

Select Speaker Type for Channel

OUTPUTS SPEAKERS SAVE

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

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Step 4 —

Save Wizard Preset

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

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

A B C D

M M M M

F1: A B C D

Indicates more Presets

Input Sub MF FullHFLF

Scroll to desired Preset

20 Factory, 50 User-defined

Step 2 —

Conﬁrm Selection

F1: A B C D

F18: 3-Way

Press ENTER to confirm selection

A+B

C D

M M M

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

You may hear relays clicking

To conrm the selection, press

ENTER

To select the Preset conguration, press

ENTER

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Set up the Inputs

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

Press ENTER to confirm

Input

1

Scroll to select (+14 or +4 dBu)

(The background turns to green.)

To confirm selection, press

ENTER

SEL

To move to the next input, press

Repeat procedure for

remaining input channels.

HOME > INPUTS > INPUT GAIN > ENTER

Step 2 —

Set Input Gain

F1: A B C D

Inputs > Input Gain

INPUT GAIN -11.8 dB

Press ENTER to confirm

Input

1

Scroll to select (-100 thru 20 dB)

(0.1 dB increments)

ENTER

To confirm selection, press

SEL

To move to the next input, press

Repeat procedure for

remaining input channels.

Set up the Outputs

NOTE:

Changes made to outputs are in real time.

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.

— Figure 26 —

Input 1

Input 2

Input 3

Input 4

Output

A

Output Mixers

B

D

C

Output Mixers

B

D

C

Output Mixers

B

D

C

Output Mixers

B

D

C

INPUTS OUTPUT

MIXER A

0.0 dB

-100 dB

0.0 dB

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HOME > OUTPUTS > MIXER > ENTER

Step 1 —

Set Mixer Gains

F1: A B C D

Output

A

MIXER

Adjust the Mixer Gain for the selected Input

After confirming all settings, press

EXIT

To confirm, press

ENTER

Scroll to remaining Inputs and repeat

Input 1

4.2

Input 2

-100.0

Input 3

2.7

Input 4

-100.0

SEL

To move to the next output, press

Mode Select

HOME > OUTPUTS > MODE > ENTER

Step 2 —

Select the Output Mode

F1: A B C D

Outputs > Mode

MODE SELECT Mode:

Press ENTER to confirm

Output

A

Low-Z, 70V, 100V

Low-Z

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

ENTER

To confirm selection, press

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:

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

you made are overwritten.

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HOME > OUTPUTS > SPKR PROC > LOAD SPKR > ENTER

Step 1 —

Load an Existing Loudspeaker for the Selected Output

ABOUT SPEAKERS LOAD

Output:

A

CONFIRM

2-Way LF

Speaker:

80 Hz

Band:

WL2102 BiLFNS

Filter:

Band and Filter

selections are

displayed and

constrained based

on the loudspeaker.

Scroll to select Speaker model

To edit Speaker, press

ENTER

Scroll to (Band, Filter)

To confirm, press

ENTER

Adjust selected parameter

ENTER

To adjust, press

To confirm, press

ENTER

Scroll to LOAD

ENTER

To Load the speaker profile to the selected output, press

Crossover

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

Step 1 —

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

Freq

70.0

HPF

F1: A B C D

Type

BWrth

Output

A

20 dB

-60 dB

Slope

24dB/oct

Type:

• Butterworth

• Linkwitz-Riley,

• Bessel-Thomson

Slope:

6dB to 48dB/oct

depending on Type

Freq: 20 - 20 kHz

Scroll to select (Freq, Type, Slope)

Turn to adjust parameter

ENTER

To edit, press

To confirm, press

ENTER

EXIT

To exit, press

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

Step 2 —

Set the Crossover Gain and Polarity

Gain

-5.5 dB

Gn/Pol

F1: A B C D

Polarity

POL +

Output

A

20 dB

-60 dB

+

Gain -100 to +20 dB

–

Scroll to select (Gain or Polarity)

Turn to adjust parameter

ENTER

To edit, press

To confirm, press

ENTER

EXIT

To exit, press

Polarity + or -

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