Full Text Searchable PDF User Manual
Operation Manual
CX4.40, CX4.50, CX4.100
CX4.150, CX4.180, CX4.240
Professional Class-D Four Channel Amplifier
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
Professional Sound System
1. SAFETY PRECAUTIONS ............................................................................ . 1
2. PRODUCT INTRODUCTION ......................................................................... 3
3. FEATURES..................................................................................................3
4. EFFICIENCY................................................................................................4
5. POWER SUPPLY......................................................................................... 4
6. SUITABLE APPLICATION............................................................................ 4
7. NOMENCLATURE AND FUNCTIONS
7.1 Front Panel .................................................................................. .... ...5
7 .2 Rear Panel...........................................................................................5
8. OPERATION INSTRUCTIONS.......................................................................6
9. TROUBLE SHOOTING ..................................................................................6
10.
APPLICATIONS
...........................................................................................7
11.
BLOCK DIAGRAM
...................................................................... ... ..............8
12.
SPECIFICATIONS..................................................................
..................... 9
13.
SERVICE & WARRANTY.....................................................
.........................10
1. SAFETY PRECAUTIONS
1
/
12
Be sure to read the instructions in this section carefully before use.
Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
We also recommend you keep this instruction manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodil y injury and property
damage which could result from mishandling. Before operating your product, read this manual first and
understand the safety symbols and messages so you are thoroughly aware of the potential safety
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
When Installing the Unit
When Installing the Unit
Do not expose the unit to rain or an environment
where it may be splashed by water or other liquids,
as doing so may result in fire or electric shock.
Use the unit only with the voltage specified on
the unit. Using a voltage higher than that
which is specified may result in fire or electric
shock.
Do not cut the link otherwise damage nor modify
the
power supply cord. In addition, avoid using
the
power cord in close proximity to heaters, and
never
place heavy objects - including the unit
itself - on the power cord, as doing so may result
in fire or
electric shock.
Be sure to replace the unit's terminal cover after
connection completion. Because high voltage
is
applied to the speaker terminals, never touch
these
terminals to avoid electric shock.
Be sure to ground to the safety ground (earth)
terminal to avoid electric shock. Never ground
to a gas pipe as a catastrophic disaster may result.
Avoid installing or mounting the unit in unstable
locations, such as on a rickety table or a slanted
surface. Doing so may result in the unit falling
down, causing personal injury and / or property
damage.
Should the following irregularity be found during
use, immediately switch off the power, disconnect
the power supply plug from the AC outlet and contact
your nearest dealer. Make no further attempt to
operate the unit in this condition as this may cause
fire or electric shock.
If you detect smoke or a strange smell coming
from the unit.
If water or any metallic object gets into the unit
If the unit falls, or the unit case breaks
If the power supply cord is damaged (exposure
of the core, disconnection, etc.)
If it is malfunctioning (no tone sounds.)
To prevent a fire or electric shock, never open nor
remove the unit case as there are high voltage
components inside the unit. Refer all servicing
to your nearest dealer.
Do not place cups, bowls, or other containers of
liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a
fire or electric shock.
Do not insert nor drop metallic objects or flammable
materials in the ventilation slots of the unit's cover,
as this may result in fire or electric shock.
SAFETY PRECAUTIONS
2
/
12
When Installing the Unit
When Installing the Unit
Never plug in nor remove the power supply plug
with wet hands, as doing so may cause electric
shock.
When unplugging the power supply cord, be sure
to grasp the power supply plug; never pull on the
cord itself. Operating the unit with a damaged
power supply cord may cause a fire or electric
shock.
When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
Do not place heavy objects on the unit as this may
cause it to fall or break which may result in personal
injury and/or property damage. In addition, the object
itself may fall off and cause injury and/or damage.
Make sure that the volume c ontrol is set to
minimum
position before power is switched on.
Loud noise produced at high volume when power
is switched on can impair hearing.
Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
Do not block the ventilation slots in the unit's cover.
Contact your dealer as to the cleaning. If
Doing so may cause heat to build up inside the unit
and result in fire.
Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke or
steam as doing otherwise may result in fire or
electric shock.
Due to product upgrades, while some of the
features and specification in the user manual
does not match the actual functions, sorry for
any inconvenience and thanks for your kind
understanding!
dust is allowed to accumulate in the unit over a
long period of time, a fire or damage to the unit
may result.
If dust accumulates on the power supply plug or in
the wall AC outlet, a fire may result. Clean it
peri
odically. In addition, insert the plug in the wall
outlet
securely.
Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.
2. PRODUCT INTRODUCTION
3
/
12
The Class-D range four channel power amplifiers are our latest digital professional power amplifier,
which is the new milestone in switch power technology amplifiers. It is of light and 1RU height but
can provide you with unprecedented strong power. The high sound quality will be a new marker of
professional audio market. The class-D range four channel power amplifiers offer six different power
ratings from 4x250W(8 Ohm) to 4x1300W(8 Ohm), and this is only provided by one rack unit, the
machine's biggest net weight is only 8 kg.
The professional class-D four channel power amplifier using classic PW M circuit and perfect
protection circuit, with high stability and applicability, timbre large dynamic range, small volume,
light weight, high efficiency, small distortion, high power, etc.
The power amplifier adopts the best power supply design with circuit stability, high efficiency, low
harmonic. In terms of digital power amplification, D class amplifier is also excellent. After years of
experiment, we successfully developed a new type of circuit topology, after the new signal modulation
mode, the music signal becomes better digital signals. The emergence of this new modulation method,
offers guarantee for some tiny signal sampling, complete the form. In addition, we also increased the
fixed switching frequency of the power, precise controlled of the dead zone time, lower power amplifier
distortion degree, make the sound quality equal or exceed the traditional analog power amplifier.
3. FEATURES
1. Advanced switching power supply technology, can provide high quality sound, compact volume.
2. Low noise and high quality speed controlled fan, using industry best cooling fan of minimize the noise.
3. W ith built-in soft start circuit for low AC surge current, can replace the power sequencer.
4. The standard Combined XLR connector and 6.3 mm Phone jack one-piece parallel socket.
5. Built-in Clipping limiting device.
6. Clipping limiting device with comprehensive status indicators on the front panel, including the power
lamp, five period of signal, pressure limit light, protection lamp and so on.
7. Full protection circuits, power amplifier consists of overload protection, short circuit protection,
temperature protection, power limitation protection, signal pressure limit protection, dc protection
current, peak limiting protection, etc. Power protection includes under voltage protection, over voltage
protection, over current pressure limit protection, over-current shutdown protection, over temperature
protection, etc.
8. 19” rack mount design in 1 RU height.
4
. E F F I C I E N C Y
4
/
12
Compared with the traditional audio power amplifier, D series power amplifier show more excellent
performance, while significantly reduce heat, offer more strong power to the speakers. High conversion
efficiency which can make the size of the power amplifier, weight and power consumption greatly reduced.
Output efficiency reaches up to 95%.
The biggest difference between class-D power amplifier and the traditional power amplifier is the highest
efficiency, the traditional power amplifier is full associated with the output, and digital power amplifier is
almost not affected by output constraints, because of the influence of music on average power density,
even the volume of the traditional power amplifier and digital power amplifier set to be the same, we will
find that the traditional power amplifier produce more than 10 times heat than the digital power amplifier.
5
. P O W E R S U P P L Y
The Professional class-D four channel power amplifier with high efficiency, good stability switch power
supply, light weight, high efficiency and power reserves, wide input voltage range, power efficiency
over 95%.
6
. S U I T A B L E A P P L I C A T I O N
1. Tour system or fixed sound installation
2. Sound reinforcement system
3. Live performance sound reinforce
4. Conference system sound reinforce
5. Background music system
6. To drive high-power and low-frequency speakers
7 . N O M E N C L AT U R E A N D F U N C T I O N S
5
/
12
Front Panel
1. CH-A volume control
2
. CH-A output level meter
3.
CH-B output level meter
4. CH-B volume control
5. CH-C volume control
6
. CH-C output level meter
7.
CH-D output level meter
8. CH-D volume control
9. Air inlet
10. Power switch
Rear Panel
11. AC
Power socket
12. Speed control cooling fan
13. CH-D signal XLR input
14. CH-C signal XLR input
15. CH-B signal XLR input
16.
CH-A signal XLR input
17. CH-D speaker output
18. CH-C speaker output
19. CH-B speaker output
20. CH-A speaker output
8 . O P E R A T I O N I N S T R U C T I O N S
6
/
12
1. Power on
1.1 According to introduction, make the setting and wiring correctly.
1.2 Check short circuit between input cable and output cable.
1.3 Check whether the local power grid are in conformity with this manual.
1.4 Make sure the power is off, turn the volume to the minimum.
1.5 Connect the power supply, turn on the audio source, power on this digital amplifier;
Adjust the volume knob clockwise to suitable location.
1.6 Turn on the effect devices and the professional amplifier and make sure the above
equipments work properly.
2. Power off
2.1 Adjust the volume knob counterclockwise to the minimum.
2.2 Turn off the switch, set to OFF position.
2.3 Turn off the professional digital amplifier, set to OFF. Then turn off the effect equipments,
audio sources.
9 . T R O U B L E S H O O T I N G
Fault phenomenon
The cause of the problem
There is no sound output
when the line connection is good
1.No electricity or plug contact undesirable
2.The fuse was burn out
3.The volume is not open
4.No input signal
Normal startup, the alarm triggered
1. Load short circuit or damaged
2. Power supply voltage is not stable, too high or
too low
3. Overload
In the normal use of all of a sudden
no sound output
1. Temperature is too high, the machine in
temperature protection
2. Loose cable connection
7
/
12
10. CONNECTION DIAGRAM
8
/
12
11. BLOCK DIAGRAM
9
/
12
Model
CX4.40
CX4.50
CX4.100
CX4.150
CX4.180
CX4.240
Description
Professional Class-D Four Channel Power Amplifier
Amplifier Class
D-Class
Rated Output 8Ω Four
250W
350W
600W
800W
1000W
1300W
Rated Output 4Ω Four
400W
500W
1000W
1500W
1800W
2400W
Rated Output 2Ω Four
500W
600W
1200W
1800W
2200W
2600W
Efficiency
>85%
Frequency Response
20Hz~20KHz (at±0.3dB)
IMD-SMPTE
<0.3%
THD @ 1kHz
<0.3%, 1dB below clip
Damping Factor @ 8Ω
>800
Slew Rate
50V/µs
Signal/Noise Ratio
>105dB
Input Sensitivity
1V
Voltage Gain
32dB
35dB
36dB
38dB
39dB
40dB
Input Impedance
20KΩ (bal.), 10KΩ (unbal.)
Crosstalk
>75dB
Connector
Input by XLR male, link by XLR female, output by Speakon female.
Protection
Clip, high temp, overload and short circuit
Cooling
Temperature controlled fan
Power Supply
AC 220~240V, 50/60Hz
Dimension (mm)
484(W)×375(D)×44(H)
484(W)×430(D)×44(H)
Net Weight
7.2kg
10.5kg
11.5kg
12. SPECIFICATION
10
Service
Procedures
Ensure the problem is not related to operator error, or system devices that are external to this unit. Information provided in
the troubleshooting portion of this manual may help with this process. Once it is certain that the problem is related to the
product contact your warranty provider as described in the warranty section of this manual.
Schematic
A Schematic is available by contacting your warranty provider.
Parts List
A Parts List is available by contacting your warranty provider.
Variations and Options
Variations
Products supplied through legitimate sources are compatible with local AC power requirements.
Warranty
Warranty terms of global three years. While the term and warranty may vary by country and may not be the same for all
products. Terms and conditions of warranty for a given product may be determined first by locating the appropriate country
which the product was purchased in, then by locating the product type.
Guangzhou CMX Audio Co., Limited
302RM 3#, Honghui Industrial Zone, Zhongyuan RD, Shibi Area, Panyu, Guangzhou, China 511497
Web:
www.cmxaudio.com
E-mail:
info@cmxaudio.com
Tel: +0086-20-39125019
Specifications may change without pre-notice.
13. SERVICE & WARRANTY