USER MANUAL
CPA 40
Two Channel Amplier
Order code: CRAM01
www.cleveracoustics.co.uk
WARNING
FOR YOUR OWN SAFETY, PLEASE READ THIS USER MANUAL CAREFULLY
BEFORE YOUR INITIAL START-UP!
CAUTION!
Keep this equipment away from rain,
moisture and liquids.
SAFETY INSTRUCTIONS
Every person involved with the installation, operation & maintenance of this
equipment should:
- Be competent
- Follow the instructions of this manual
CAUTION! TAKE CARE USING THIS EQUIPMENT!
HIGH VOLTAGE-RISK OF ELECTRIC SHOCK!!
Before your initial start-up, please make sure that there is no damage caused during
transportation. Should there be any, consult your dealer and do not use the equipment.
To maintain the equipment in good working condition and to ensure safe operation, it is
necessary for the user to follow the safety instructions and warning notes written in this
manual.
Please note that damages caused by user modications to this equipment are not
subject to warranty.
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IMPORTANT:
The manufacturer will not accept liability for any resulting damages caused
by the non-observance of this manual or any unauthorised modication to the
equipment.
• Never let the power-cable come into contact with other cables. Handle the
power-cable and all mains voltage connections with particular caution!
• Never remove warning or informative labels from the equipment.
• Do not open the equipment and do not modify the equipment.
• Do not switch the equipment on and off in short intervals, as this will reduce the
system’s life.
• Only use the equipment indoors.
• Do not expose to ammable sources, liquids or gases.
• Do not carry the unit with only one handle. Always carry using both handles.
• Always disconnect the power from the mains when equipment is not in use or
before cleaning! Only handle the power-cable by the plug. Never pull out the plug
by pulling the power-cable.
• Make sure that the mains supply voltage is between 110V/240V.
• Make sure that the power-cable is never crimped or damaged. Check the
equipment and the power-cable periodically.
• If the equipment is dropped or damaged, disconnect the mains power supply
immediately.
Have a qualied engineer inspect the equipment before operating again.
• If the equipment has been exposed to drastic temperature uctuation (e.g. after
transportation), do not switch it on immediately. The arising condensation might
damage the equipment. Leave the equipment switched off until it has reached
room temperature.
• If your product fails to function correctly, discontinue use immediately. Pack the
unit securely (preferably in the original packing material), and return it to your
Prolight dealer for service.
• Only use fuses of same type and rating.
• Repairs, servicing and power connection must only be carried out by a qualied
technician. THIS UNIT CONTAINS NO USER SERVICEABLE PARTS.
• WARRANTY; One year from date of purchase.
OPERATING DETERMINATIONS
If this equipment is operated in any other way, than those described in this manual,
the product may suffer damage and the warranty becomes void.
Incorrect operation may lead to danger e.g.: short-circuit, burns, electric shocks.
Do not endanger your own safety and the safety of others!
Incorrect installation or use can cause serious damage to people and property.
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This amplier was designed specically for use in permanent audio installations, where
reliability and premium sound quality are a must. Highly rugged construction and high
efciency design make this amplier perfect for continuous duty applications in situations
were power will be left on for indenite periods of time.
This amplier is warranted from defects for one year from the date of purchase. Should your
amplier require service, either within or beyond that warranty period, please contact your
Prolight Dealer.
This unit includes a host of features, along with an impressive list of specications, which
are detailed over the next pages. Please take the time to read this document completely
prior to installation of this product.
Features
• Ultra compact Class D amplier
• Stereo 2 x 20W 4ohms
• Rugged steel chassis with wall/panel mount ears
• High efcient about 85%, low heat-generation technology
• Environment-protection green technology to save power consumption
• Stereo RCA unbalanced line level inputs with gain control
• Independent L/R volume controls
• Independent bass and treble controls
• Stereo left & right channel outputs
• Built-in intelligent limiter to eliminate the earth line noise when connected with
laptop or MP3
• Automatic standby when no input signal is detected for 5 minutes
• Automatic power on when input signal is detected
• Switch on delay for added speaker protection
• Convenient push terminal speaker outputs
• Overload, high temp and short-circuit protection
• Supplied with DC 24V power adaptor
Specications
• Power Output: Both channels 20W x 2 driven at 4Ω, 10W x 2 driven at 8Ω
• Frequency Response: 50Hz ~ 18KHz
• S/N Ratio: <85dB
• Total Harmonic Distortion (THD): 0.1% @1kHz, 1/3 power
• Controls: Power, input sensitivity, gain control, treble and bass
• Protection: Overload, high temp and short circuit
• Power requirements: DC 24V, AC (adaptor supplied)
• Dimensions: 56mm (H) x 230mm (W) x 115mm (D)
• Weight: 1kg
Applications
• Installation behind at panel monitors to power local speakers
• Kiosk and retail displays
• Powering additional zones on an existing distributed audio system
• Audio program material for digital signage installations
• Classroom installations, especially where video projectors are used
• Gaming & Vending machines
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Identication:
1. DC Power Input – Supplied AC adaptor provides 24VDC, 3A.
2. Power ON/OFF Selector – Turns amplier power on or off. When on, the blue LED
immediately to the right of this switch will illuminate.
3. Speaker Output Connection – Spring Clips
4. Unbalanced Input Connection – Accepts standard line level signal from conventional
consumer devices such as CD/DVD players, television monitors, tape decks and tuners.
Note that stereo operation requires connection to left and right inputs.
5. Left / Right Channel Level Controls – Independent controls set output level for the
amplier.
6. Bass Control – This control adjusts low frequencies centered at 100Hz, at a rate of
±10dB.
7. Treble Control – This control adjusts high frequencies centered at 10,000Hz, at a rate of
±10dB.
8. Sensitivity control – Gain control
9. Power LED – Indicates the amplier is powered on
Inputs
Short cables runs improve the sound quality remarkably. Input cables should be short and direct,
since high frequencies will mostly be absorbed if the cables are unnecessarily long. Besides that
a longer cable may lead to humming and noise problems. If the cable runs are unavoidable, you
should use balanced cables.
Outputs
The high damping factor of your amplier supplies a clear sound reproduction.
Unnecessarily long and thin cables will inuence the damping factor and thus the low frequencies
in a negative way. In order to safeguard good sound quality, the damping factor should lie around
50. The longer a cable has to be the thicker it should be.
Connection To The Mains
The CPA 40 requires a 24V DC power source (mains power supply included). Do not connect the
CPA 40 directly to the mains voltage outlet. If a replacement PSU is required contact your loacal
Prolight dealer.
Operation
After having connected your amplier to the mains, turn both gain controls counter clockwise to
the “min” position. The last product to be switched on is the amplier.
If you want to switch off the system, switch off the amplier rst in order to avoid acoustic
shocks on the speakers.
Problem Chart
PROBLEM
No Power
No Sound
Noise
CAUSE
The power cord is not connected
The power cord of the respective
product is not connected properly or
not at all.
The connection socket or the plug
is dirty.
The input signal is too strong
REMEDY
Check the power cord and any
extension cables
Check the power cord and if the
plugs are properly connected with
the sockets.
Clean the socket and/or the plug.
Reduce the input signal via the
gain control.
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Connections:
4-8Ω 4-8Ω
AUDIO SOURCE
Cleaning and Maintenance
We recommend a frequent cleaning of the product. Please use a soft lint free and moistened
cloth. Never use alcohol or solvents.
There are no serviceable parts inside the product except for the fuse. Maintenance and service
operations are only to be carried out by authorised dealers.
Replacing the fuse
Only replace the fuse by a fuse of the same type and rating.
Before replacing the fuse, unplug the mains lead.
Should you need any spare parts, please use genuine parts.
Should you have any further questions, please contact your dealer.
CAUTION - DANGER TO LIFE
DISCONNECT FROM THE MAINS BEFORE
STARTING MAINTENANCE OPERATION
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www.cleveracoustics.co.uk
Correct Disposal of this Product
(Waste Electrical & Electronic Equipment)
English
(Applicable in the European Union and other European countries with seperate
collection systems)
This marking shown on the product or its literature, indicates that it should not be
disposed with other household wastes at the end of its working life. To prevent possible
harm to the environment or human health from uncontrolled waste disposal, please
seperate this from other types of wastes and recycle it responsibly to promote the
sustainable reuse of material resources.
Household users should contact either the retailer where they purchased this product, or
their local government office, for details of where and how they can take this item for
environmentally safe recycling.
Business users should contact their supplier and check the terms and conditions of the
purchase contract. This product should not be mixed with other commercial wastes for
disposal.
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