CXPowerAmplifier
User Guide
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DOCUMENTATION CONVENTIONS
This document contains general safety, installation, and operating instructions for the CX-7 and CX-5 Power Amplifiers. It is important to
read this user guide before attempting to use these products. Pay particular attention to safety instructions.
The following symbols are used in this document:
Appears on the component to indicate the presence of uninsulated, dangerous voltage inside the enclosure –
voltage that may be sufficient to constitute a risk of shock.
Calls attention to a procedure, practice, condition or the like that, if not correctly performed or adhered to, could result
in injury or death.
CAUTION
Calls attention to a procedure, practice, condition or the like that, if not correctly performed or adhered to, could result
in damage to or destruction of part or all of the product.
WARNING
3 Oak Park
Bedford, MA 01730-1413 USA
Tel 781-280-0300
Note:
Calls attention to information that is essential to highlight.
Fax 781-280-0490
www.harmanspecialtygroup.com
Manufactured under license from THX, Ltd. “THX” and “Ultra2” are trademarks or registered trademarks of THX, Ltd.
Customer Support
Tel 781-280-0300
Fax 781-280-0495 (Sales)
Fax 781-280-0499 (Service)
“Lexicon” and the Lexicon logo are registered trademarks of Harman International Industries. U.S. patent numbers and other worldwide patents issued and pending.
© 2003 Harman Specialty Group. All rights reserved.
Part No. 070-15879 | Rev 0 | 07/03
This document should not be construed as a commitment on the part of Harman Specialty Group. The information it contains is subject to change without notice.
Harman Specialty Group assumes no responsibility for errors that may appear within this document.
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Introduction
Lexicon
Introduction
Section 1: Getting Started
About the CX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . 1-2
Highlights
Unpacking and Inspection . . . . . . . . . . . . . . . . . . . . . .iii
US
DE
ES
FR
IT
Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Installation Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Auspackend und Inspektion . . . . . . . . . . . . . . . . . . . . .iii
Desempaquetando e Inspección . . . . . . . . . . . . . . . . . .iii
Déballer et Inspectión . . . . . . . . . . . . . . . . . . . . . . . . .iii
Spacchettando ed Ispezione . . . . . . . . . . . . . . . . . . . . .iii
Desempacotando e Inspeção . . . . . . . . . . . . . . . . . . . .iii
Section 2: Basic Operation
PT
Front Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Thermal Protection • Current Protection • DC Protection
Section 3: Troubleshooting and Maintenance
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Appendix
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Index
ii
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Introduction
CX Power Amplifiers
UNPACKING AND INSPECTION
DÉBALLER ET INSPECTIÓN
US
FR
After unpacking the unit, save all packing materials in case the unit
ever needs to be shipped. Thoroughly inspect the modules and
packing materials for signs of damage. Report any damage
to the carrier at once; report equipment malfunction to the
dealer.
Après avoir déballé l'unité, sauve toutes les matières de l'emballage
au cas où vous avez besoin jamais de transporter l'unité.
Entièrement inspectez les modules et emballer des matières pour
signes de dégât. Rapportez tout dégât au porteur à la fois;
fonctionnement défectueux du matériel du rapport à votre
revendeur.
AUSPACKEND UND INSPEKTION
DE
SPACCHETTANDO ED ISPEZIONE
IT
Überprüfen Sie die Verpackung auf Beschädigung. Nehmen Sie das
Gerät aus der Verpackung. Heben Sie das gesamte
Verpackungsmaterial auf, falls das Gerät einmal verschickt werden
muss. Überprüfen Sie alle Bestandteile auf Beschädigung.
Verständigen Sie sofort den Spediteur, falls die Verpackung
und/oder die Bestandteile der Lieferung beschädigt sind.
Verständigen Sie sofort Ihren Händler, falls das Gerät nicht richtig
funktioniert.
Dopo avere spacchettato l'unità, mai salvi tutti i materiali di
imballaggio in caso che Lei ha bisogno di inviare l'unità.
Completamente ispezioni i moduli e comprimendo materiali per
segnali di danno. Subito riporti alcun danno al corriere;
malfunzionamento di attrezzatura di rapporto al Suo rivenditore.
DESEMPACOTANDO E INSPEÇÃO
PT
Depois de desempacotar a unidade, economiza todos os materiais
de embalagem no caso de você já precisa transportar a unidade.
Completamente inspecione os módulos e empacotando materiais
para sinais de dano. Informe qualquer dano imediatamente ao
portador; mau funcionamento de equipamento de relatório para
seu negociante.
DESEMPAQUETANDO E INSPECCIÓN
ES
Después de desempaquetar la unidad, ahorra todos los materiales
del embalaje en caso de que usted alguna vez necesita enviar la
unidad. Completamente inspeccione los módulos y condensando
los materiales para las señales de daño. Informe cualquier daño en
seguida al portador; el funcionamiento defectuoso de equipo de
informe a su distribuidor.
iii
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1
Getting Started
About the CX Power Amplifiers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Highlights
Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
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Getting Started
Lexicon
to provide at-a-glance viewing of channel status at all times.
ABOUT THE CX POW ER AMPLIFIERS
With THX Ultra2 Certification, the CX amplifiers are certified to
meet the highest THX standards. Advanced thermal, current, DC,
and speaker protection further guarantee exceptional performance
under even the most extreme operating conditions. Add to this
incredible power and wide-ranging flexibility, and the CX ampli-
fiers are at home in the most sophisticated and demanding home
theaters.
Thank you for purchasing a CX Power Amplifier, a reference-quali-
ty amplifier, which is based on the award-winning LX amplifier and
is designed to meet the highest standards of power and perform-
ance under even the most extreme operating conditions. Equipped
with advanced thermal, current, DC, and speaker protection, the
CX amplifiers deliver reliable and exceptional performance with
most loudspeakers, including mismatched, reactive, and unusual
loads. In addition, the CX amplifiers include protection against
short circuits, component failures, miswiring, and internal faults.
Available in seven or five channel versions, the CX amplifiers
deliver high-power performance. Each 140-Watt channel includes
four custom-designed, hand-graded output transistors All chan-
nels are capable of driving speaker impedances of 2Ω and above.
Complemented by gold-plated speaker output connectors, the rear
panel includes selectable balanced or unbalanced audio input via
RCA and XLR connectors. A trigger input connector allows the CX
amplifiers to be controlled with associated components such as the
MC-12 or MC-8 Digital Controller. In addition, a ground lift switch
for each channel can be used to eliminate audible hum caused by
multiple grounding paths.
The CX amplifiers include advanced thermal, current, and DC
protection for each channel. Thermal protection monitors the
temperature of the chassis and heatsinks and automatically deacti-
vates the specific channel(s) when they exceed their normal safe
operating temperature. Current protection ensures that the
output transistors are protected by limiting the current capability
which is determined by the output voltage, while DC protection
prevents DC and frequencies below 10Hz from reaching the speak-
ers. Dedicated channel status LEDs are located on the front panel
1-2
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Getting Started
CX Power Amplifiers
HIGHLIGHTS
PRODUCT REGISTRATION
•
•
140 Watts per channel
Please register the CX Power Amplifier within 15 days of purchase.
complete and return the product registration card attached to the
back cover of this user guide. The product registration card serves
no warranty purposes. Retain the sales receipt as proof of warranty
coverage.
Four custom designed, hand-graded output transistors per
channel
•
Oversized toroidal power transformer with extraordinarily low
DC resistance and thermal protection
•
•
•
•
•
•
•
High-power supply voltage for extra headroom at the outputs
Stable with mismatched, reactive, or unusual loads
Compatible with 2Ω speaker impedances
INSTALLATION CONSIDERATIONS
The CX Power Amplifiers require special care during installation to
ensure optimal performance. Leave at least 2 inches of open space
around the top, sides, and rear of the amplifier for proper ventila-
tion. If the amplifier is installed in an equipment rack, an optional
rack-mount kit is available from Lexicon dealers or at
THX Ultra2 Certification
Thermal protection against overheating
Speaker protection against DC and frequencies below 10Hz
Protection against short circuits, device failures, miswiring, and
internal faults
•
•
•
•
•
Trigger input for power control from an external device
RCA and XLR inputs
GROUND LIFT switch per channel
Gold plated input and output connectors
Rack-mount option available
•
•
Be careful when moving the CX Power Amplifiers,
which are quite heavy.
CAUTION
Do not obstruct the ventilation holes in the chassis.
1-3
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2
Basic Operation
Front Panel Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Rear Panel Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Thermal Protection • Current Protection • DC Protection
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Basic Operation
Lexicon
FRONT PANEL OVERVIEW
1
2
channel status LEDs will light. If the red standby button LED
flashes rapidly and the blue channel status LEDs do not light,
the incoming AC voltage is too low or the temperature of the
transformer is too high. Refer to Section 3 for troubleshooting
information.
1. Standby Button
Activates and deactivates standby mode when the CX amplifi-
er is powered on with the rear panel power switch. The stand-
by button performs no function when the CX amplifier is pow-
ered off with the rear panel power switch, or when the trigger
switch is set to ON or DELAY (see page 2-7 for more detail).
Note:
When the unit is on, pressing the standby button activates
standby mode and deactivates the CX amplifier. When the unit
is in standby, pressing the standby button deactivates standby
mode and activates the CX amplifier. The red standby button
LED will flash for approximately seven seconds. Then, the blue
• Power is still supplied to the CX amplifier when
standby mode is activated.
2-2
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Basic Operation
CX Power Amplifiers
1
2
2. Channel Status LEDs
Provide an at-a-glance view of the status of each channel as
indicated in the table below:
Color
Status
Constant Blue
Normal Operation
Note:
Constant Bright Blue Indicates the audio signal is clipping. Reduce volume level to help
eliminate potentially damaging audio signals from reaching the speakers.
When the main power transformer temperature
exceeds 100˚C:
• the transformer will deactivate
•the channel status LEDs will no longer be lit
•the red standby LED will flash rapidly
The temperature of the individual amplifier heatsink is above 95˚C. If this
occurs, the channel will not pass audio. The channel status LED will return
to constant blue when the temperature of the amplifier card returns to
normal. Then the channel will automatically resume passing audio.
Flashing Blue
The temperature of the chassis is above 58˚C, and the amplifier will no
longer pass audio. After the chassis temperature returns to normal, all the
channel status LEDs will return to constant blue and the amplifier will
resume normal operation.
All Channels Flashing
Blue
2-3
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Basic Operation
Lexicon
REAR PANEL OVERVIEW
5
7
8
3
4
The CX-7 rear panel is shown above. The CX-5 rear
panel is shown on page 2-6. The rear panels are
similar, except the CX-7 amplifier includes two
additional channels.
6
2
1
External wiring connected to connectors marked with the
icon pictured at the left requires installation by a
qualified person or the use of ready-made leads or cords.
WARNING
2-4
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Basic Operation
CX Power Amplifiers
1. Power Switch
4. OUTPUT 1 to 7 (CX-7) or 1 to 5 (CX-5)
Disconnects power to the AC Input Connector. Set this switch
to off when making or breaking connections to the amplifier.
Provide audio output for the speakers. OUTPUT connectors can
accept bare speaker wires, banana plug connectors, or certain
spade connectors. When using bare speaker wires, loosen the
connector, insert the wire into the top of the receptacle, then
tighten the connector. The same procedure should be used for
spade connectors. Banana plugs should be inserted into the
outward-facing receptacle.
2. AC Input Connector
The AC input connector provides power to the unit with the
supplied power cord (3 conductor, 14AWG). Do not use an
extension cord. For optimal performance, use an isolated
power receptacle with adequate current (at least 15 Amps).
Line voltages ≥10% above the specified voltage may damage
the amplifier. Line voltages ≥10% below the specified voltage
may cause the amplifier to enter a protection mode, indicated
by the red standby LED flashing.
Use heavy gauge speaker cable to ensure low-impedance
connections between the amplifier and the speakers. Observe
correct speaker polarity.
3. INPUT 1 to 7 (CX-7) or 1 to 5 (CX-5)
Do not connect the OUTPUTs of one channel to the
OUTPUTs of other channels or to other amplifiers.
WARNING
Provide audio input for the speakers connected to the
corresponding audio outputs. When using the unbalanced
(RCA) audio inputs, make sure the UNBAL/BAL switch
located below each XLR connector is set to UNBAL. When
using the balanced (XLR) audio inputs, make sure the
UNBAL/BAL switch is set to BAL. The illustration below shows
the appropriate cable pin-out for XLR connectors.
Note:
Speakers must have impedance ratings of 2Ω or
higher. Using speakers with lower than recommend-
ed impedance ratings might activate protection
modes.
2 = Positive
Male
Cable End
. . . continued on page 2-7
3 = Negative
1 = Ground
2-5
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Basic Operation
Lexicon
REAR PANEL OVERVIEW (continued)
5
8
7
3
4
The CX-5 rear panel is shown above. The CX-7 rear
pa nel is shown on pa ge 2-4. Both a re
simila r, except the CX-7 fea tures two a dditiona l
channels.
6
2
1
External wiring connected to connectors marked with the
icon pictured at the left requires installation by a
qualified person or the use of ready-made leads or cords.
WARNING
2-6
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Basic Operation
CX Power Amplifiers
. . . continued from page 2-5
7. TRIGGER INPUT
Enables the amplifier to be controlled by the MC-12/MC-8 or
other external devices with a 12V DC trigger output. Connect
the trigger output of the external device to the TRIGGER INPUT
of the amplifier, and set the TRIGGER switch on the amplifier to
ON or DELAY. The amplifier will automatically respond when
the external device is powered on and off.
5. UNBAL/BAL Switch
Selects between unbalanced (RCA) or balanced (XLR) audio
input for each channel. Power the amplifier off or reduce sys-
tem volume before changing the setting of the UNBAL/BAL
switch. If the amplifier is connected to a digital controller such
as the MC-12 or MC-8, output levels should be
re-calibrated whenever the setting is changed.
8. TRIGGER INPUT Switch
When set to OFF, the amplifier only powers on and off in
response to the front panel standby button. When set to ON
or DELAY, only the external device connected to the TRIGGER
INPUT can be used to power the amplifier on and off. The front
panel standby button will not power the unit on and off.
(However, the standby LED still functions normally.)
6. GROUND LIFT Switches
When set to ON, isolates the ground connection between that
channel’s audio inputs and the chassis. This can be useful for
eliminating audible hum or noise caused by multiple
grounding paths in the system. When set to OFF, the audio
input is grounded to the chassis. This switch should be set to
ON whenever there is ground noise present in the system.
Do not defeat or remove the ground prong on the AC
WARNING
power cord.This will result in a safety hazard, and will not
reduce audible hum. The GROUND LIFT switches have
no affect on the safety ground of the amplifier.
2-7
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Basic Operation
Lexicon
CURRENT PROTECTION
PROTECTION MODES
The CX amplifiers use a combination of voltage and current infor-
mation to protect the output transistors. The amount of current
capable of being delivered to the load is dependent on how much
voltage appears across the output transistors. Inversely, this means
that the more output voltage available, the more current capabili-
ty available, which translates into higher power output.
The CX amplifiers are equipped to protect against overheating and
miswiring, as well as electrical failures such as short circuits, device
failures, internal faults, and DC output to the speakers.
THERMAL PROTECTION
The amplifier includes thermal protection for each channel, the
main power transformer, and chassis. If a heatsink temperature
exceeds 95˚C, the channel will deactivate and the corresponding
channel status LED will flash blue. When the heatsink cools to
normal operating temperature, the channel will automatically reac-
tivate and the corresponding channel status LED will return to
constant blue.
In addition to the voltage and current thermal protection, the CX
amplifiers have a time dependent instantaneous current limit. The
amplifier is capable of delivering 20 amps peak into a load for a
short duration of time.
DC PROTECTION
Each channel includes DC protection to prevent DC and frequen-
cies below 10Hz from reaching the speakers. If this protection
activates, the output relay will open and the corresponding front
panel channel status LED will flash blue. After approximately 4-sec-
onds, DC protection will be automatically deactivated. The relay
will close and the corresponding channel status LED will return to
constant blue. If DC or frequencies below 10Hz are still present, DC
protection will be automatically reactivated. The amplifier will
continue to engage this protection until the problem is no longer
present.
If the amplifier chassis exceeds a temperature of 58˚C, the amplifi-
er will shut down all channels and all the channel status LEDs will
flash blue. When the chassis cools to normal operating tempera-
ture, all of the channels will automatically reactivate and the chan-
nel status LEDs will return to steady blue.
If the main power transformer temperature exceeds 100˚C, the
transformer will deactivate, all channel status LEDs will no longer
be lit, and the red standby LED will flash rapidly. Once the trans-
former has cooled, it will automatically be reset and the amplifier
will operate normally. The channel status LEDs will return to
constant blue, and the red standby LED will no longer be lit.
2-8
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3
Troubleshooting & Maintenance
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
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Troubleshooting & Maintenance
Lexicon
One or m ore channels is not passing audio, but the
corresponding channel status LED is lit blue.
TROUBLESHOOTING
1. Reduce system volume level.
No front panel LEDs are lit.
2. Make sure the UNBAL/BAL switch is set to the connector being
used (UNBAL for RCA and BAL for XLR).
1. Make sure the unit is plugged in and the rear panel power
switch is set to on.
Audio sounds out-of-phase.
The red Standby LED is flashing rapidly.
1. Check to ensure proper speaker wiring.
1. Power the amplifier off. Allow the amplifier to cool before
powering it on again.
A humming sound is present in the audio.
2. Check the incoming line voltage. It should not be more than
10% below the mains supply voltage indicated in the
Specifications (page A-2).
1. Set the GROUND LIFT switches to ON.
One or more channels is outputting distorted sound.
One or m ore channels is not passing audio, and the
corresponding channel status LED is flashing blue.
1. Reduce system volume level.
2. Make sure speakers have compatible impedance ratings (see
page 2-5).
1. Reduce system volume level.
2. Power the amplifier off. Allow the amplifier to cool before
powering it on again.
The TRIGGER INPUT is connected to an external device, but the
amplifer does not power on and off with the external device.
3. If the problem persists after the amplifier has cooled,
contact an authorized Lexicon dealer or Harman Specialty
or 781-280-0300.
1. Make sure the TRIGGER INPUT switch is set to ON or DELAY.
The amplifier and other electrical devices in the listening room
suddenly lose power.
The standby button does not appear to be functioning.
1. Reset the circuit breakers for the affected device(s).
1. Make sure the rear panel power switch is set to on.
2. Make certain the rear panel TRIGGER INPUT switch is set to
OFF.
If all else fails . . .
1. Contact an authorized Lexicon dealer.
2. Contact Harman Specialty Group customer service
@
3-2
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Troubleshooting & Maintenance
CX Power Amplifiers
Note:
frequently asked questions and additional trou-
bleshooting information.
MAINTENANCE
The following routine maintenance should be performed on a
periodic basis:
•
Clean the exterior surfaces of the unit with a soft, dry, lint-free
cloth. Do not use alcohol, benzene, acetone-based cleaners, or
strong commercial cleaners. Do not use a cloth made with
steel wool or metal polish. If the unit is exposed to a dusty
environment, a low-pressure blower may be used to remove
dust from its exterior.
3-3
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A
Appendix
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Declaration of Conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
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Appendix
Lexicon
SPECIFICATIONS
Audio Input Connectors
Performance (Continued)
CX-7
CX-5
7 RCA, 7 XLR
5 RCA, 5 XLR
Below 0.03% at 140W, 8Ω
IM Distortion
Crosstalk
80dB at 1kHz, minimum
850 at 20Hz, minimum
Damping Factor
Input Sensitivity
Audio Output Connectors
CX-7
CX-5
7 pairs of gold-plated binding posts
• 2V input for 100W output at 8Ω,
5 pairs of gold-plated binding posts
balanced inputs
• 1V input for 100W output at 8Ω,
unbalanced inputs
Performance
• 20kΩ, balanced
Input Impedance
Gain
• 10kΩ, unbalanced
140W at 8Ω,
Output Power
all channels driven
20Hz to 20kHz
• 23dB, balanced
• 29dB, unbalaced
Minimum
Speaker
2Ω
Impedance
Other
Frequency
Response
• 20Hz to 20kHz ±0.1dB
• 10Hz to 100kHz +0.5/-3dB
12V DC +/- 10%
Trigger Input
Power Requirements
• 120V 60Hz 15 Amp (domestic)
• 230V 50Hz 10 Amp (export)
Below 0.02% at 140W, 8Ω
all channels driven
20Hz to 20kHz
THD
• CX-7: 52.8 lbs (24 kg)
• CX-5: 47.1 lbs (21.4 kg)
Weight
Signal-to-Noise
Ratio
110dB
Optional brackets are available for mounting either
amplifier in standard 19-inch equipment rack
22 kHz bandwidth, unweighted
Rack Mounting
(Ref 140W at 8Ω)
Specifications are subject to change
without notice
A-2
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Appendix
CX Power Amplifiers
DECLARATION OF CONFORMITY
Application of Council Directive(s):
89/336/EEC and 93/68/EEC
Standard(s) to which Conformity is Declared:
EN 55103-1:1995, EN 61000-3-3:1995,
EN 55022:1992 (Class B), EN 55103-2:1996, and EN 60065:1998
Manufacturer:
Harman Specialty Group
3 Oak Park
Bedford, MA 01730-1413 USA
The equipment identified here conforms to the Directive(s) and Standard(s) specified
above.
Type of Equipment:
Model:
CX-7 and CX-5 Power Amplifiers
Lexicon CX-7 and CX-5
Date:
July 2003
Harman Specialty Group
Vice President of Engineering
3 Oak Park
Bedford, MA 01730-1413 USA
Tel: 781-280-0300
Fax: 781-280-0490
A-3
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I
Index
AC Input Connector . . . . . . . . . . . . . . . . . . . . . . .2-5
AC Power Cord . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
BAL/UNBAL Switch . . . . . . . . . . . . . . . . .2-5, 2-7, 3-2
Channel Status LEDs . . . . . . . . .2-2, 2-3, 2-8, 2-9, 3-2
Connectors . . . . . . . . . . . . . . . . . . .2-4, 2-5, 2-6, 3-2
Cooling System . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Current Protection . . . . . . . . . . . . . . . . . . . . . . . .2-8
DC Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Declaration of Conformity . . . . . . . . . . . . . . . . . . .A-3
Documentation Conventions . . . . . . . . . . . . . . . . . . .i
Front Panel . . . . . . . . . . . . . . . . . . . . . . . .2-2 to 2-3
CX-7 . . . . . . . . . . . . . . . . . . . . . . .2-2 (Illustration)
CX-5 . . . . . . . . . . . . . . . . . . . . . . .2-3 (Illustration)
GROUND LIFT Switches . . . . . . . . . . . . . . . . .2-7, 3-2
INPUTs . . . . . . . . . . . . . . . . . . .2-4, 2-5, 2-6, 2-7, 3-2
Inspection Instructions . . . . . . . . . . . . . . . . . . . . . . .iii
LEDs, Channel Status . . . . . . . . . . . . . . . . . . .2-3, 3-2
Limited Warranty . . . . . . . . . . . . . . .Inside Back Cover
Installation Considerations . . . . . . . . . . . . . . . . . . .1-3
CX Power Amplifiers, About . . . . . . . . . . . .1-2 to 1-3
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
Male Cable End, XLR . . . . . . . . . . . . .2-5 (Illustration)
OUTPUTs . . . . . . . . . . . . . .2-4, 2-5, 2-6, 2-7, 2-8, 2-9
Power Outage . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Power Switch . . . . . . . . . . . . . . . . . . . . . . . . .2-5, 3-2
Product Registration . . . . . . . . . . . . . . . . . . . . . . .1-3
Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . .2-8
RCA Connectors . . . . . . . . . . . . . . . . . . .2-5, 2-7, 3-2
Rear Panel . . . . . . . . . . . . . . . . . . . . .2-4 to 2-7, 3-2
CX-7 . . . . . . . . . . . . . . . . . . . . . . .2-4 (Illustration)
CX-5 . . . . . . . . . . . . . . . . . . . . . . .2-6 (Illustration)
Registration, Product . . . . . . . . . . . . . . . . . . . . . . .1-3
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . .ii
Thermal Protection . . . . . . . . . . . . . . . . . . . . . . . .2-8
TRIGGER INPUT . . . . . . . . . . . . . . . . . . . . . . .2-7, 3-2
TRIGGER INPUT Switch . . . . . . . . . . . . . . . . .2-7, 3-2
Troubleshooting . . . . . . . . . . . . . . . . . . . . .3-2 to 3-3
UNBAL/BAL Switch . . . . . . . . . . . . . . . . .2-5, 2-7, 3-2
Unpacking Instructions . . . . . . . . . . . . . . . . . . . . . .iii
Warranty . . . . . . . . . . . . . . . . . . . . .Inside Back Cover
XLR Connectors . . . . . . . . . . . . . . . . . . .2-5, 2-7, 3-2
XLR Male Cable End . . . . . . . . . . . . . .2-5 (Illustration)
Safety Instructions . . . . . . . . . .Inside Front Cover, i, iii,
1-3, 2-4, 2-6, 2-7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-2
Standby Button . . . . . . . . .2-2, 2-3, 2-5, 2-7, 2-8, 3-2
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LIMITED WARRANTY
Harman Specialty Group offers the following warranty on
this product:
2. Damage occurring during any shipment of this product.
Claims for shipping damages must be made with the
carrier.
3. Include a copy of the original dated sales receipt. (A
copy of the original dated sales receipt must be
presented whenever warranty service is required.)
3. Damage to a unit that has been altered, or on which
the serial number has been defaced, modified, or
removed.
4. Do not include accessories such as power cords or
user guides unless instructed to do so.
What is the Duration of this Warranty?
This warranty will remain in effect for five (5) years from the
original date of purchase.
What Expenses will Harman Specialty Group Assume?
What are the Limitations of Implied Warranties?
Harman Specialty Group will pay all labor and material
expenses for covered items. Payment of shipping charges is
discussed in the next section of the warranty.
Any implied warranties, including warranties of
merchantability and fitness for a particular purpose, are
limited in duration to the length of this warranty.
Who is Covered?
This warranty may be enforced by the original purchaser
and subsequent owners during the warranty period,
provided the original dated sales receipt or other proof of
warranty coverage is presented at time of service.
How is Service Obtained?
What Certain Damages are Excluded?
When this product needs service, write, telephone, or fax
Harman Specialty Group to request information about
where the unit should be taken or sent. When making a
written request, please include your name, complete
address, and daytime telephone number; the product
model and serial numbers;and a description of the problem.
Do not return the unit to Harman Specialty Group without
prior authorization.
Harman Specialty Group’s liability for a defective product is
limited to repair or replacement of that product, at our
option. Harman Specialty Group shall not be liable for
damages based on inconvenience; loss of use of the prod-
uct; loss of time; interrupted operation; commercial loss; or
any other damages, whether incidental, consequential, or
otherwise.
What is Covered?
This warranty covers all defects in material and
workmanship on this product, except as specified below.
The following are not covered:
1. Damage resulting from
A. Accident, misuse, abuse, or neglect.
B. Failure to follow instructions contained in the user
guide.
How do State Laws Relate to this Warranty?
When Shipping a Product for Service . . .
Some states do not allow limitations on the duration of
implied warranties and/or the exclusion or limitation of
incidental or consequential damages. As such, the above
limitations may not apply.
1. Pay any initial shipping charges, which are the
responsibility of the owner. If necessary repairs are
covered by this warranty, Harman Specialty Group will
pay return shipping charges to any destination in the
United States using the carrier of our choice.
C. Repair or attempted repair unauthorized by
Harman Specialty Group.
D. Failure to perform recommended periodic
maintenance.
E. Causes other than product defects, including lack
of skill, competence, or experience on the part of
the owner.
This warranty is not enforceable outside of North America.
This warranty provides specific legal rights. Additional rights
may be provided by some states.
2. Pack the unit securely. Package insurance is strongly
recommended.
Harman Specialty Group
3 Oak Park
Tel 781-280-0300
Fax 781-280-0490
Customer Support
Tel 781-280-0300
Bedford, MA 01730-1413
USA
Fax 781-280-0495 (Sales)
Fax 781-280-0499 (Service)
www.harmanspecialty group.com
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Harman Specialty Group
3 Oak Park
Bedford, MA 01730-1413 USA
Tel 781-280-0300
Fax 781-280-0490
www.harmanspecialtygroup.com
Customer Support
Tel 781-280-0300
Fax 781-280-0495 (Sales)
Fax 781-280-0499 (Service)
Part No. 070-15879 | Rev 0 | 07/03
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