EAW POWER AMPLIFIER CXA120 User manual
CXA120
Power Amplier
INSTRUCTION MANUAL
© 2004 LOUD TECHNOLOGIES INC.
"EAW" IS A REGISTERED TRADEMARK
OF LOUD TECHNOLOGIES INC.
CXA120-AMPLIFIER
CXA120-AMPLIFIER
2 – CXA120
CXA120 – 3
1. SAFETY INSTRUCTIONS
1. Read Instructions — Read all the safety and operation instructions
before operating the Component.
2. Retain Instructions — The safety and operating instructions should
be kept for future reference.
3. HEED ALL WARNINGS — Follow all warnings on the Component
and in these operating instructions.
4. FOLLOW ALL INSTRUCTIONS — Follow all operating and other
instructions.
5. Water and Moisture — Do not use the Component near water
– for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a
wet basement, near a swimming pool, etc.
6. Ventilation — This Component should be situated so that its location
or position does not interfere with its proper ventilation. For example,
it should not be situated on a bed, sofa, rug, or similar surface that may
block any ventilation openings, or placed in a built-in installation such as
a bookcase or cabinet that may impede the ow of air through ventilation
openings.
7. Heat — Locate the Component away from heat sources such as
radiators, or other devices which produce heat.
8. Power Sources — Connect the Component to a power supply only
of the type described in these operation instructions or as marked on the
rear panel. If using an external DC power supply or battery pack, be sure
the voltage corresponds to the range indicated on the rear panel, and
that it is connected with the correct polarity.
9. Power Cord Protection — Route power supply cords so that they
are not likely to be walked upon or pinched by items placed upon or
against them, paying particular attention to cords at plugs, convenience
receptacles, and the point where they exit the Component.
10. Object and Liquid Entry — Do not drop objects into or spill
liquids into the inside of the Component.
11. Damage Requiring Service — The Component should be
serviced only by qualied service personnel when:
A. The power-supply cord or the plug has been damaged; or
B. Objects have fallen, or liquid has spilled into the Component; or
C. The Component has been exposed to rain; or
TABLE OF CONTENTS
1. SAFETY INSTRUCTIONS ...................................................2
2. INTRODUCTION..................................................................3
KEY FEATURES............................................................3
APPLICATIONS ...........................................................3
3. FRONT PANEL FEATURES .................................................4
4. REAR PANEL FEATURES....................................................5
5. THERMAL CONSIDERATIONS ..........................................8
6. CONNECTIONS ...................................................................8
7. TYPICAL HOOKUP DIAGRAM...........................................9
8. SPECIFICATIONS..............................................................10
9. SERVICE INFORMATION .................................................11
10. EAW COMMERCIAL WARRANTY ................................11
D. The Component does not appear to operate normally or exhibits a
marked change in performance; or
E. The Component has been dropped, or its chassis damaged.
12. Servicing — The user should not attempt to service the Component
beyond those means described in this operating manual. All other
servicing should be referred to the EAW Commercial Service Department.
13. To prevent electric shock, do not use this polarized plug with an
extension cord, receptacle or other outlet unless the blades can be fully
inserted to prevent blade exposure.
Pour prévenir les chocs électriques ne pas utiliser cette che polariseé
avec un prolongateur, un prise de courant ou une autre sortie de
courant, sauf si les lames peuvent être insérées à fond sans laisser
aucune pariie à découvert.
14. Grounding or Polarization — Precautions should be taken so that
the grounding or polarization means of the Component is not defeated.
15. This apparatus does not exceed the Class A/Class B (whichever is
applicable) limits for radio noise emissions from digital apparatus as set
out in the radio interference regulations of the Canadian Department of
Communications.
ATTENTION —Le présent appareil numérique n’émet pas de bruits
radioélectriques dépassant las limites applicables aux appareils
numériques de class A/de class B (selon le cas) prescrites dans le
règlement sur le brouillage radioélectrique édicté par les ministere des
communications du Canada.
WARNING! This equipment has been designed to be installed
by qualied professionals only! There are many factors to be
considered when installing professional sound reinforcement
systems, including mechanical and electrical considerations, as
well as acoustic coverage and performance. EAW Commercial
strongly recommends that this equipment be installed only by a
professional sound installer or contractor.
Part No. 0010171 Rev. B 04/04
© 2004 LOUD Technologies Inc. All Rights Reserved.
Printed in China.
CAUTION AVIS
RISK OF ELECTRIC SHOCK • DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED PERSONNEL
ATTENTION: POUR EVITER LES RISQUES DE CHOC
ELECTRIQUE, NE PAS ENLEVER LE COUVERCLE. AUCUN
ENTRETIEN DE PIECES INTERIEURES PAR L'USAGER. CONFIER
L'ENTRETIEN AU PERSONNEL QUALIFIE.
AVIS: POUR EVITER LES RISQUES D'INCENDIE OU
D'ELECTROCUTION, N'EXPOSEZ PAS CET ARTICLE
A LA PLUIE OU A L'HUMIDITE
The lightning flash with arrowhead symbol within an equilateral triangle is
intended to alert the user to the presence of uninsulated "dangerous voltage"
within the product's enclosure, that may be of sufficient magnitude to constitute
a risk of electric shock to persons.
Le symbole éclair avec point de flèche à l'intérieur d'un triangle équilatéral est
utilisé pour alerter l'utilisateur de la présence à l'intérieur du coffret de "voltage
dangereux" non isolé d'ampleur suffisante pour constituer un risque d'éléctrocution.
The exclamation point within an equilateral triangle is intended to alert the user
of the presence of important operating and maintenance (servicing) instructions
in the literature accompanying the appliance.
Le point d'exclamation à l'intérieur d'un triangle équilatéral est employé pour
alerter les utilisateurs de la présence d'instructions importantes pour le fonction-
nement et l'entretien (service) dans le livret d'instruction accompagnant l'appareil.
2 – CXA120
CXA120 – 3
2. INTRODUCTION
The CXA120 is designed for continuous duty in speech,
music, paging and sound reinforcement applications in
churches, schools, ofces, arenas, hotel meeting rooms,
convention centers, recreation facilities and other venues
demanding high performance, exible features, and rugged
dependability.
The CXA120 offers two discrete inputs with priority. The
main program input is actively balanced and terminated to
screw-terminal connections on the rear panel. The second
input is a telephone/paging input, which is also actively
balanced and terminated to a screw-terminal connection on
the rear panel. The telephone/paging input has voice-activated
priority over the main program input, and has an adjustable
rear panel volume control.
The main input features a 0/–20 dB sensitivity switch for
low-level and high-level input signals.
Output modes include 4Ω constant impedance, and
25 V, 70 V, and 100 V constant voltage. The smart output
stage is fully protected against permanent damage caused by
overloading, shorts, and extreme temperatures. The CXA120
operates on either 115 or 230 VAC, 50/60Hz, determined by
a voltage select switch, and supplied by a detachable IEC
power cord. A rear panel terminal strip connection is provided
for connecting an external 24 VDC backup battery, with a rear
panel DC power switch.
The front panel provides a master volume control, and
controls for Bass and Treble. The Bass and Treble controls
provide shelving equalization, with up to 10 dB of boost or cut
at 100 Hz and 10 kHz.
A front panel meter indicates output signal strength,
ranging from –20 dB to +6 dB.
KEY FEATURES
• One balanced/unbalanced Main Input
• One balanced/unbalanced Telephone Paging Input with
Volume Trim Control and Voice-Activated Priority
• 120 watt rms, convection cooled
• 4 Ω – 25 V – 70 V – 100 V Outputs
• Discrete component power amplier
• Switchable 24 VDC Backup Power Input
• 2 RU Rack-Mounting Kit Included
APPLICATIONS
• Foreground/Background Music Systems
• Sound Reinforcement Systems
• Paging Systems
• Continuous-duty Applications
4 – CXA120
CXA120 – 5
3. FRONT PANEL FEATURES
1. EQ-LO
Turn this clockwise to boost the level of the low-frequency
range below 100 Hz. Turn it counter-clockwise to cut the
level. In the center position, there is no change in level.
The maximum boost and cut is 10 dB at 100 Hz.
2. EQ-HI
Turn this clockwise to boost the level of the high-frequency
range above 10 kHz. Turn it counter-clockwise to cut the
level. In the center position, there is no change in level.
The maximum boost and cut is 10 dB at 10 kHz.
3. VOLUME
Use this volume control to adjust the sound output level to
your speakers.
4. LED METER
This meter shows the signal output level.
The left ve LEDs represent the area between –20 dB and
0 dB. Adjust the Volume to keep your output within these
levels.
Turn down the Volume level so the two right LEDs do not
light, otherwise the outgoing signal will clip and distort.
5. POWER and POWER LED
Use this switch to turn the unit on or off. This connects/
disconnects the AC power to the AC power transformer.
The unit is on when the switch is pressed in, and the LED
above the power switch lights.
The unit is off when the switch is in the out position.
© 2004 LOUD TECHNOLOGIES INC.
"EAW" IS A REGISTERED TRADEMARK
OF LOUD TECHNOLOGIES INC.
CXA120-AMPLIFIER
CXA120-AMPLIFIER
12345
4 – CXA120
CXA120 – 5
4. REAR PANEL FEATURES
6. AC FUSE
The main AC fuse provides protection if the current draw of
the unit is excessive.
Make sure that the power cord is unplugged before
removing or checking the AC fuse. When you are sure
that all is safe, undo the fuse cover with a cross-head
screwdriver, taking care not to damage the cover or fuse.
Replace the fuse only with the same type and rating as
marked on your unit.
7. IEC AC INPUT
The supplied power cord connects here. Check that the
voltage setting of the VOLTAGE CONVERSION (9) switch is
the same as your local AC Mains voltage before plugging
in the power cord. Make sure that your local AC Mains is
capable of supplying adequate current.
8. DC POWER SWITCH
If this switch is pressed in, the unit will automatically
switch to external DC battery power whenever (or if-ever)
your local AC power fails. You will need to connect an
external 24-volt battery to the DC battery terminals (12).
If the switch is out, the battery will not power up the unit.
9. VOLTAGE CONVERSION
The unit can be congured to operate at 115 VAC or 230 VAC.
Be sure this switch is set to the correct position for
the AC power supply being used, before plugging in
the power cord. The switch can be moved with a small at
screwdriver, once the protective cover is removed. Replace
the cover afterwards.
10. INPUT SENSITIVITY
This adjusts the gain of the input section.
If you have a weak input signal, leave this switch out.
If you have a strong signal, press this switch in.
11. TEL VOLUME
This controls the volume of any signals connected to the
TELEPHONE PAGING (15) input terminals. Adjust it to suit
your taste, so any pages are heard clearly. Turn this down if
you are not using these input terminals.
12. DC BATTERY TERMINALS
These two screw terminals are
used to connect an optional
external 24 VDC battery.
Make absolutely sure
the positive post of your
battery goes to the positive
terminal, and the negative
post conncts the the negative
terminal.To minimize the
voltage drop across the wires and prevent overheating, use
at least 14 AWG wire.
The unit can be powered using a 24 VDC power supply
(if the rear panel DC POWER SWITCH is pressed in). This
serves as a backup supply in case of an AC power failure.
The unit seamlessly switches to the backup supply if
there's a power loss, allowing safety instructions and
emergency communications to continue. When both AC
power and 24 VDC power are connected, the AC power is
used and no current is drawn from the DC supply.
Note: The unit will not charge the battery, so you should
have a dedicated charging system. Note also, that when
running on DC power, the output is lower than when
running on AC power.
© 2004 LOUD TECHNOLOGIES INC.
"EAW" IS A REGISTERED TRADEMARK
OF LOUD TECHNOLOGIES INC.
CXA120-AMPLIFIER
CXA120-AMPLIFIER
+ 100V70V 25V
4
COM
DC 24V
-
- +
24VDC
12 16
15
10 11
14
13
6789
6 – CXA120
CXA120 – 7
13. OUTPUT TERMINALS
This terminal is normally covered by a protective cover.
Remove the two screws and the cover while making or
undoing connections. Securely ret the cover when you
have nished making the connections.
The ve output terminals are labeled COM, 4 Ω, 25 V, 70 V
and 100 V.
CONSTANT IMPEDANCE
To connect a speaker directly,
connect the COM terminal
to the negative post of your
speaker, and connect the 4 Ω
terminal to the positive post.
Make sure that your
average speaker impedance
is not less than 4 Ω, as this may
overload the amplier.
The speaker output connectors are screw terminals. Use
16 or 18 gauge wire for connecting the amplier outputs to
the speakers. Strip the wire back about 3/8" inch, loosen
the screw enough to loop the wire around the shaft of
the screw (clockwise), and tighten down the screw with a
screwdriver.
CONSTANT VOLTAGE
If you are using a constant-voltage distributed speaker
system, connect either the 25 V, 70 V, or 100 V output
terminal to the "+" side of the speaker system, and connect
the "COM" output terminal to the "–" side of the speaker
system.
The voltage of your speakers must equal the voltage of
the amplier's output terminal ( 25 V, 70 V, or 100 V).
Make sure that the taps on the speakers add up to no
more than 90% rated power (108 W for the CXA120).
CAUTION: To prevent the risk of electric shock,
never touch the bare wires coming from the OUTPUT
TERMINALS of the amplier when it is switched on.
When the connections have been made, insulate the
25 V, 70 V, and 100 V terminals of the amplier using
the protective cover supplied.
COM and 25V are used to connect a string of 25V speakers.
Use Class II or Class I wiring:
COM and 70V are used to connect 70V speakers.
Use Class I wiring:
COM and 100V are used to connect 100V speakers
Use Class I wiring:
+ 100V70V 25V
4
COM
DC 24V
-
- +
© 2004 LOUD TECHNOLOGIES INC.
"EAW" IS A REGISTERED TRADEMARK
OF LOUD TECHNOLOGIES INC.
CXA120-AMPLIFIER
CXA120-AMPLIFIER
12 16
15
10 11
14
13
6789
+ 100V70V 25V
4
COM
DC 24V
-
0 0 0
25V 25V 25V
+ 100V70V 25V
4
COM
DC 24V
-
000
70V 70V 70V
+ 100V70V 25V
4
COM
DC 24V
-
0 0 0
100V 100V 100V
6 – CXA120
CXA120 – 7
14. INPUT TERMINALS
The Input has a balanced screw terminal connector that
accepts an audio line-level mono signal. The screw
terminals should be connected as shown in the following
gures:
Balanced connection:
HOT (+) connects to BAL1, Cold (-) connects to BAL 2, and
the shield connects to COM.
Strip the wire back about 1/2" inch, loosen the screw
enough to loop the wire around the shaft of the screw
(clockwise), and tighten down the screw with either a slot-
head or phillips-head screwdriver.
Use high-quality, three-conductor shielded cable for
balanced connections. The better the shield, the better the
audio signal is protected from induced EMI and RFI.
Unbalanced connection:
If connecting an unbalanced line-level signal to the Input,
wire the connections as shown in the following gure:
HOT (+) connects to BAL1, the shield connects to COM, and
an insulated jumper connects COM to BAL2.
BAL1 COM BAL2
TEL PAGING
T R G
COM
JUMPER
SHIELD
HOT (+)
BAL1 COM BAL2
TEL PAGING
T R G
COM
SHIELD
SHIELD
HOT (+)
COLD (--)
15. TELEPHONE PAGING TERMINALS
These 300 ohm input terminals allow you to connect an
auxiliary input. The volume level of this input is adjusted
using the rear panel TEL VOL (11) level control.
Any signals present at these terminals take voice priority
over the main input. An internal adjustment pot is provided
for adjusting the threshold of the voice priority circuit (see
page 10).
16. GROUND (EARTH) SCREW
The chassis connects to ground via the AC ground, and
normally does not need any extra ground connection.
Connections, if required, should be made by experienced,
qualied electricians.
8 – CXA120
CXA120 – 9
XLR Balanced Wiring
Pin 1 = Shield
Pin 2 = Hot (+)
Pin 3 = Cold (–)
1/4" TRS Phone Plugs and Jacks
“TRS” stands for Tip-Ring-Sleeve, the three connections
available on a stereo 1/4" or balanced phone jack or plug.
TRS jacks and plugs are used for balanced signals and
stereo headphones.
1/4" TRS Balanced wiring
Sleeve = Shield
Tip = Hot (+)
Ring = Cold (–)
1/4" TS Phone Plugs and Jacks
“TS” stands for Tip-Sleeve (famous Olympic hurdler), the
two connections available on a mono 1/4" phone jack or
plug. They are used for unbalanced signals.
1/4" TS Unbalanced Wiring
Sleeve = Shield
Tip = Hot (+)
RCA Plugs and Jacks
RCA-type plugs (also known as phono plugs) and jacks
are often used in home stereo and video equipment and
in many other applications. They are unbalanced and
electrically equivalent to a 1/4" TS phone plug.
RCA Unbalanced Wiring
Sleeve = Shield
Tip = Hot
5. THERMAL CONSIDERATIONS
The power amplier within the unit is convection cooled
rather than fan cooled. Heat is drawn away from the
amplier by the heatsink and radiated through the cooling
vents in the top cover.
When installing, be sure to allow sufcient air space
around the top and rear of the amplier to allow
adequate cooling for the heatsink. Leave at least one rack
space above and below, and at least 6 inches behind the
chassis to allow proper ventilation.
If the amplier should overheat, a thermal switch turns
off the power amplier, allowing the heatsinks to cool
down. Once the amplier has cooled to a safe operating
temperature, the thermal switch resets and reactivates
the amplier. If this should occur, identify the cause of the
problem and take corrective action. For example:
• Provide better ventilation
• Install a fan in the rack to move more air
• Make sure the amplier is not overloaded with too
low of a load impedance or by a short circuit on the
speaker line
RACK MOUNTING
Two rack ears are provided to allow the unit to be tted
within a standard 19" rack.
Remove two front screws from each side, and securely t
each rack ear in place. The unit still needs to be supported
underneath, due to the weight of the power and output
transformers.
6. CONNECTIONS
Here are some common audio connectors and their internal
wiring. This may help you wire up to the screw terminal inputs
of your unit. You can see which pins of the connectors are
usually hot, cold, or ground.
On your unit:
BAL1 = Hot (+)
COM = Shield
BAL2 = Cold (–)
XLR Connectors
XLR connectors are commonly wired as follows (according
to standards specied by the Audio Engineering Society):
2
2
31
1
SHIELD
COLD
HOT
SHIELD
COLD
HOT
3
SHIELD
COLD
HOT
3
2
1
SLEEVE
TIP
TIP
SLEEVE
TIP
SLEEVE
TI
P
SLEEVE
TIPSLEEVE
SLEEVE
TIP
SLEEVE
TIP
RING
RING
TIP
SLEEVERING
BALANCED INPUT
BAL1 COM BAL2
TEL PAGING
T R G
COM
8 – CXA120
CXA120 – 9
1202-VLZPRO
© 2004 LOUD TECHNOLOGIES INC.
"EAW" IS A REGISTERED TRADEMARK
OF LOUD TECHNOLOGIES INC.
CXA120-AMPLIFIER
MIXER OR PREAMPLIFIER
7. TYPICAL HOOKUP DIAGRAM
10 – CXA120
CXA120 – 11
8. SPECIFICATIONS
Performance
Amplier Power: 120 W, nominal, 180 W peak (10 mS)
Frequency Response: 50 Hz–15 kHz ±3 dB
Distortion: < 0.5% THD at 1 kHz nominal power
Noise: >75 dB
Equalization
Output:
EQ-HI: ±10 dB at 10 kHz
EQ-LO: ±10 dB at 100 Hz
Audio Inputs
Main Input Type: One balanced/unbalanced screw-terminal
connectors with switchable input level
Main Input Sensitivity: 1 V balanced/0.5 V unbalanced
Aux Input Sensitivity: 100 mV balanced/50 mV unbalanced
Main Input Impedance: 10 kΩ
Aux Input Impedance: 20 kΩ
Tel/Paging Input Type: One balanced/unbalanced screw-terminal
connector with adjustable input level
Tel/Paging Input Impedance: 300 Ω
Audio Outputs
Number of Channels: One
Low Impedance: 4 Ω
Constant Voltage: 25 V, 70 V, 100 V Screw-terminal
connectors (15 Ω, 42 Ω, 83 Ω)
Controls
Front Panel: Power switch and LED, Master Volume, EQ-LO, EQ-HI
Rear Panel: Telephone Paging output volume level,
Input sensitivity switch, 24 VDC on/off switch,
AC Power
Power supply: 115/230 VAC (±5%), 50/60 Hz, 2.5 A fuse
24 VDC (battery), 15 A fuse
Power Consumption: 285 W
Environment
Maximum Ambient: 131° F (55° C) Non-precipitating humidity
Physical
Dimensions (HxWxD): 3.9 in/100 mm x 17.1 in/435 mm x 13.2 in/335 mm
Weight: 19.4 lb/8.8 kg
Warranty
5 years, parts and labor
Accessories
Rack-mount kit
DISCLAIMER
EAW Commercial continually engages in research related
to product improvement, new materials, and production
methods. Design renements are introduced into existing
products without notice as a routine expression of that
philosophy. For this reason, any current EAW Commercial
product may differ in some respect from its published
description, but will always equal or exceed the original design
specications unless otherwise stated.
“EAW Commercial” is a trademark of LOUD Technologies
Inc. All other brand names mentioned are trademarks or
registered trademarks of their respective holders, and are
hereby acknowledged.
VOICE PRIORITY ADJUSTMENT
The amplier has an internal adjustment potentiometer (on
the front circuit board) that allows you to set the level at which
the voice priority circuit activates.
For example, suppose that only loud talking into a
telephone paging microphone will mute the main input's music
program. This potentiometer can adjust the voice priority
sensitivity until it takes only moderate or low volumes to mute
the music.
Please note that the following adjustment is for
qualied and experienced electronics technicians
only, carefully trained in all aspects of ESD (electro-static
discharge) precautions and electronics safety.
1. Make sure the unit is switched off, and that the power
supply cord and all other cords are removed.
2. Turn the unit upside down and place it on a soft at
surface.
3. Look along the bottom edge of the front panel and you will
see a small access hole in the bottom panel. Inside the
hole you will see a small potentiometer, R45 on the front
panel circuit board.
4. Using an insulated small phillips screwdriver, gently rotate
this pot to change the sensitivity (clockwise for more
sensitivity, i.e., less intense signals will mute the input).
5. When nished, verify that the Telephone paging will
suitably mute the main input, without having to shout.
BassTrebleVol
Power Access
Hole
Feet Feet
10 – CXA120
CXA120 – 11
9. SERVICE INFORMATION
In the event that your CXA120 should require servicing,
please follow these instructions:
1. Call EAW Commercial Tech Support at 1-888-337-7404,
7 am to 5 pm PST (Monday-Friday), to verify the problem
and obtain a Return Authorization (RA) Number. Be sure to
have the serial number of the unit when you call. You must
have a Return Authorization Number in order to obtain
warranty service at the factory or at an authorized service
center. You can also email EAW Commercial Tech Support
2. Pack the unit in its original packaging. THIS IS VERY
IMPORTANT. EAW Commercial is not responsible for
any damage that occurs during shipping due to non-
conventional packaging. Original packaging helps to
minimize the possibility of shipping damage.
3. Include a legible note stating your name, (no P.O. boxes),
daytime phone number, Return Authorization Number, and
a detailed description of the problem, including how we
can duplicate it.
4. Write the Return Authorization Number in BIG BOLD PRINT
on the top of the box.
5. Tech Support will tell you where to ship the unit when you
call for an RA Number. We suggest insurance for all forms
of cartage.
10. EAW COMMERCIAL
WARRANTY
Warranty: LOUD Technologies Inc. requires its authorized
EAW Commercial distributors to abide by the following
warranty terms for all EAW Commercial brand products
(all dates are from the date of delivery from an Authorized
EAW Commercial Distributor to the end user/installation
site): Loudspeakers – 5 years; Active Electronics – 5 years;
Accessories – 2 years.
What Is Covered: Defects in workmanship and materials
and against malfunctions. EAW Commercial distributors
must remedy all such defects and malfunctions without
charge for parts or labor if the warranty applies. Final
determination of warranty coverage lies solely with each
authorized EAW Commercial distributor.
What Is Not Covered: This warranty does not extend
to damage or malfunctions resulting from, but not limited
to, shipment, improper installation, misuse, neglect,
abuse, normal wear, accident, or to any product on
which the serial number has been modied or removed.
Exterior defects in or damage to the exterior appearance
are specically excluded from this warranty. EAW
Commercial distributors shall not be liable for incidental
or consequential damages resulting from the use of EAW
Commercial products. Repairs and/or modications by
other than an Authorized EAW Commercial Distributor
automatically voids this warranty.
BAL1
BAL2
TEL
PAGING
TEL VOLUME
LINE FUSE
DC SWITCH
MUTE
SENSITIVITY
VOICE PRIORITY
ADJUST
MASTER
VOLUME
TREBLE
BASS
POWER AMPLIFIER
LED METERS
DC POWER RAIL
100V
70V
4 ohm
COM
25V
OUTPUT
TRANSFORMER
POWER
TRANSFORMER
AC IN
DC IN
!
!
!
!
CXA120 BLOCK DIAGRAM
EAW Commercial A LOUD Technologies Inc. Company
EAW Commercial | One Main Street | Whitinsville, MA 01588 USA | TEL toll free within US/Canada 888.337.7404
TEL outside US 425.892.6503 | FAX 425.485.1152 | www.eawcommercial.com
© 2004 LOUD Technologies Inc. All Rights Reserved.
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