Full Text Searchable PDF User Manual
MA 120 100V 20W
Mixer Amplifier
User Manual
Order code: CRAM30
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MA 120 Mixer Amplifier
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TONE
MASTER VOLUME
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FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
2
Safety advice
WARNING
FOR YOUR OWN SAFETY, PLEASE READ THIS USER MANUAL
CAREFULLY BEFORE YOUR INITIAL START-UP!
• Before your initial start-up, please make sure that there is no damage caused during transportation.
• Should there be any damage, 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 modifications to this equipment are not subject to warranty.
IMPORTANT:
The manufacturer will not accept liability for any resulting damages caused by the non-observance
of this manual or any unauthorised modification to the equipment.
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 and electric shocks etc.
Do not endanger your own safety and the safety of others!
Incorrect installation or use can cause serious damage to people and/or property.
• 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 unit.
• Do not open the equipment and do not modify the unit.
• 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 flammable sources, liquids or gases.
• 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 available voltage is
240V, 50Hz AC or 12V DC.
• 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 and have a qualified
engineer inspect the equipment before operating again.
• If the equipment has been exposed to drastic
temperature fluctuation (e.g. after transportation),
do not connect power or 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, stop 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 qualified technician. THIS UNIT CONTAINS
NO USER SERVICEABLE PARTS.
• WARRANTY: Three years from date of purchase.
CAUTION!
KEEP THIS EQUIPMENT
AWAY FROM RAIN,
MOISTURE AND LIQUIDS
CAUTION!
TAKE CARE USING
THIS EQUIPMENT!
HIGH VOLTAGE-RISK
OF ELECTRIC SHOCK!!
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
3
Product overview & technical specifications
A compact, desktop mixer amplifier suitable for small offices, retail spaces and garage forecourts. The 12V DC
input allows the amplifier to be powered from DC power backup sources or alternatively from leisure type batteries
for sound reinforcement in remote locations away from mains power.
• 100V and low impedance 4-16Ω loudspeaker output
• Two unbalanced microphone inputs via 6.35mm
( ¼” jack) each with independent level controls
• Line 1/2 inputs (switchable) with level control
• Master tone control
• Master volume control
• Screw terminal loudspeaker outputs
with touch proof cover
• Captive power connection
• Convection cooled for silent operation
MA 120 100V 20W Mixer Amplifier
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MA 120 Mixer Amplifier
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
OUTPUTS
FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
Specifications
MA 120 Mixer Amplifier
Power output
20Wrms (40W peak)
Speaker output
100V & 4-16Ω
Microphone sensitivity
-48dB (±2dB)
Aux input sensitivity
-12dB (±2dB)
Frequency response
100Hz-13kHz (±3dB)
Tone control
±10dB
S/N ratio
>55dB
THD
<1% (@1kHz 1W output)
Power consumption
22W (max.)
Power supply
240V AC 50Hz / 12V DC (2.5A)
Fuse
T500mA 250V
Dimensions
84 x 320 x 235mm
Weight
4.2kg
Order code
CRAM30
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MA 120 Mixer Amplifier
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MIC 2
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
8
4mm
320mm
235mm
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
4
Panel & connection identification
01 - Power on/off switch
02 - Power LED
03 - Master volume control
04 - Tone control
05 - LINE 1/LINE 2 level control
06 - MIC 1 level control
07 - MIC 2 level control
08 - MIC 1 input
09 - MIC 2 input
10 - Fuse: T500mA 250V
11 - Captive power connection
12 - DC power input terminals
13 - Loudspeaker output terminals
14 - LINE 1/LINE 2 selector switch
15 - LINE 1 input RCA connector
16 - LINE 2 input RCA connector
17 - Ground connection
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MA 120 Mixer Amplifier
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
OUTPUTS
FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
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MA 120 Mixer Amplifier
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
OUTPUTS
FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
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www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
5
Mains voltage supply:
Before connecting the amplifier to the local mains voltage outlet should be checked to ensure the
available supply is 240V~AC 50Hz. This product is CLASS1 and requires a protective mains earth to be
connected at all times.
DO NOT
remove or disconnect the earth.
Power on/off procedure:
After connecting your amplifier to the mains, turn all controls counter clockwise to the
“0”
position.
Turn on audio sources (MP3 players, CD players, microphones etc) before powering the amplifier
“ON”
. The last product to be switched on is the amplifier. If you wish to power off the system, turn the
amplifier’s master volume control counter clockwise to the
“0”
position before switching the amplifier
“OFF”
before any audio sources are switched off. By following this procedure it will prevent acoustic
shocks to the speakers or potential damage to system components.
After connecting all audio sources and powering on the mixer amplifier, adjust the level of each audio
input to achieve the desired
“mix”
. Care should be taken to when adjusting microphone input volumes
and the master volume, adjust both of these in small increment’s to avoid feedback (howl around).
The goal is to achieve a clear balance between music and voice ensuring announcements can be
clearly heard.
DC power connection:
The MA 120 features a 12V DC power input for operation from leisure type batteries or from battery DC
backup sources. The amplifier should be connected to a fused, 12V DC source via the DC power input
terminals (11) ensuring care is taken to observe the correct polarity. The amplifier will automatically
transfer to DC operation should the main 240V input fail. The transfer is instantaneous and silent.
Please note:
The power on/off switch does not have any control over the 12V DC power input.
Master volume control:
The master volume control affects the level of all audio sources within the amplifier. Turn the level
control anti-clockwise to the lowest setting, or turn clockwise to adjust the overall output to the highest
setting. Adjustments should be made gradually to avoid any sudden changes to the audio output.
Operating instructions
DC 12V
Battery
12V DC
input
–
COM
8Ω
+
4Ω
16Ω
100V
FUSE
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
6
Tone control:
The tone control can be used to adjust the overall sound from the amplifier. Turn anti-clockwise for more
bass, or turn clockwise for more mid & treble.
Microphone inputs:
Two low impedance microphone inputs are provided, each located on the front panel via an unbalanced,
6.35mm (¼”) jack. Each microphone input features its own independent level control.
Before connecting a microphone, turn the level control anti clockwise to the lowest setting.
After connection, gradually increase the level control by turning clockwise until the desired
level is achieved.
Note: Unbalanced cable lengths should be kept to the minimum length possible, ideally under
20m and away from any potential sources of interference including power, speaker and control
cables/equipment.
Line inputs:
The amplifier features two audio inputs located on the rear panel, each input features a mono RCA
(phono) input connector. The line inputs are designed for line level sources (150mV) such as CD players
or MP3 players. A “Y” cable may be required to combine Left and Right outputs from stereo sources.
Note: Only one of the two inputs may be used at any one time, the selector switch may be used to
choose from the two inputs. Slide the switch to the left to select LINE 2 or slide to the right to LINE 1.
Output connections:
The amplifier may be used to drive either low impedance (4/8/16Ω) loads or 100V line constant voltage
loads, only one output may be used, the amplifier is not designed to drive multiple loads simultaneously.
Operating instructions
MIC
Unbalanced microphone
Single pole phone plug
3mV
Selector switch
LINE 2
LINE 2
LINE 1
LINE 1
150mV
150mV
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
7
Low impedance:
The amplifier has been designed to drive into loads between 4Ω and 16Ω. The appropriate output
terminal should be selected to match the impedance of the speakers to be connected. When installing
low impedance speaker systems, the cable lengths should be kept to a minimum to help prevent
voltage drop within the cable.
DO NOT
connect a speaker load to the amplifiers output terminals of lower
impedance than is marked on the output terminals.
100V Line:
For longer cable runs, the amplifier may be used to drive 100V loudspeaker systems reducing losses
within the cable. Connect the 100V line level loudspeakers using a parallel wiring configuration taking
care to ensure the load connected to the amplifier is within 85% of the amplifiers rated wattage to
leave appropriate headroom. Care should be taken to check the wiring and load for short circuits before
connecting the cable to the COM and 100V terminals on the rear panel.
Operating instructions
COM 4Ω 8Ω 16Ω 100V
100V
100V
100V
100V
+
-
+
-
COM 4Ω 8Ω 16Ω 100V
Total impedance: 4Ω
+
-
COM 4Ω 8Ω 16Ω 100V
Total impedance: 8Ω
+
-
+
-
COM 4Ω 8Ω 16Ω 100V
Total impedance: 16Ω
8Ω
8Ω
8Ω
8Ω
8Ω
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
8
Typical panel connections
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MA 120 Mixer Amplifier
MIC 1
MIC 2
MIC 1
0
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2
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LINE 1/LINE 2
0
1
2
3
4
5
6
7
8
9
10
TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
OUTPUTS
FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
MIC 1
MIC 2
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MA 120 Mixer Amplifier
MIC 1
MIC 2
MIC 1
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MIC 2
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LINE 1/LINE 2
0
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW
HIGH
OUTPUTS
FUSE:
T500mA 250V
POWER INPUT:
240V~50Hz
LINE 2
LINE 1
LINE 2
LINE 1
www.cleveracoustics.co.uk
DC 12V 2.5A
+
SERIAL NUMBER
COM
4Ω
8Ω
16Ω 100V
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
POWER CONSUMPTION: 22W (max.)
MAINS
CD PLAYER
LOUDSPEAKERS
MP3 PLAYER
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
9
Schematics
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!
!
!
!
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
10
WEEE notice
Correct Disposal of this Product
(Waste Electrical & Electronic Equipment)
(Applicable in the European Union and other European countries
with separate 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 separate 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.
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
11
www.cleveracoustics.co.uk
MA 120 Mixer Amplifier
User Manual
12