Clever Acoustics MA 4120 MKII User Manual
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Clever Acoustics MA 4120 MKII User Manual

480w, 4 zone mixer amplifier
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MA 4120 MKII 480W
4 Zone Mixer Amplifier
CH 1
CH 2
GAIN
GAIN
-10
+10
-10
+10
TREBLE
TREBLE
-10
+10
-10
+10
BASS
BASS
-10
+10
-10
+10
MUTE
MUTE
5
5
4
6
4
6
3
7
3
7
2
8
2
8
9
9
1
1
VOL
VOL
0
10
0
10
Z1
Z2
Z1
Z2
Z1
Z3
Z4
Z3
Z4
Z3
www.cleveracoustics.co.uk
User Manual
CH 3
CH 4
GAIN
GAIN
-10
+10
-10
+10
TREBLE
TREBLE
-10
+10
-10
+10
BASS
BASS
-10
+10
-10
+10
MUTE
MUTE
5
5
4
6
4
6
3
7
3
7
3
2
8
2
8
2
9
9
1
1
1
VOL
VOL
0
10
0
10
Z2
Z1
Z2
Z1
Z4
Z3
Z4
Z3
MONITOR
MONITOR
PRIORITY
LINE OUTPUT
1W
8
G
+
–
+
ZONE
110-120V~
220-240V~
POWER INPUT:
110-240V~50/60Hz
RISK OF ELECTRIC SHOCK
DO NOT OPEN. NO USER
SERVICABLE PARTS INSIDE
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK.
DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE
SERIAL NUMBER
110-120V~60Hz - FUSE: T12A 250V
220-240V~50/60Hz - FUSE: T6.3A 250V
POWER CONSUMPTION (max.): 550W
Order code: CRAM33
CH 5
MA 4120 MKII Mixer Ampli er
GAIN
-10
+10
TREBLE
-10
+10
BASS
-10
+10
MUTE
5
4
6
7
8
9
0
10
0
10
VOL
PHONE
MONITOR
0
10
VOLUME
VOLUME
Z2
Z4
PHONE
PHANTOM
LINE
MIC
TEL PAGING
HOT
COM
GND
TEL
VOLUME
CH3
CAUTION
PHANTOM
LINE
MIC
CH4
ZONE 1
ZONE 2
VOLUME
VOLUME
5
5
4
6
4
6
3
7
3
7
2
8
2
8
1
9
1
9
0
10
0
10
MONITOR
MONITOR
ZONE 3
ZONE 4
VOLUME
VOLUME
5
5
4
6
4
6
3
7
3
7
2
8
2
8
1
9
1
9
0
10
0
10
MONITOR
MONITOR
PHANTOM
LINE
MIC
POWER AMP OUTPUT
LINE OUT - BAL/UNBAL
ZONE 1
G
–
+
COM
4
8
POWER AMP OUTPUT
LINE OUT - BAL/UNBAL
ZONE 2
G
–
+
COM
4
8
CH1
POWER AMP OUTPUT
LINE OUT - BAL/UNBAL
ZONE 3
G
–
+
COM
4
8
PHANTOM
LINE
MIC
POWER AMP OUTPUT
LINE OUT - BAL/UNBAL
ZONE 4
G
–
+
COM
4
8
CH2
POWER
ON
OFF
25V
70V
100V
25V
70V
100V
25V
70V
100V
25V
70V
100V

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  • Page 1 MA 4120 MKII 480W 4 Zone Mixer Amplifier User Manual CH 1 CH 2 CH 3 CH 4 CH 5 MA 4120 MKII Mixer Ampli er GAIN GAIN GAIN GAIN GAIN ZONE 1 ZONE 2 POWER VOLUME VOLUME TREBLE TREBLE...

  • Page 2: Safety Advice

    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. CAUTION! CAUTION! TAKE CARE USING KEEP THIS EQUIPMENT THIS EQUIPMENT! AWAY FROM RAIN, HIGH VOLTAGE-RISK MOISTURE AND LIQUIDS OF ELECTRIC SHOCK!! IMPORTANT:...
  • Page 3 Product overview & technical specifications MA 4120 MKII 480W 4 Zone Mixer Amplifier The MA 4120 MKII 4 Zone Mixer Amplifier is ideal for systems where multiple zones are required. Designed for use in venues such as schools, churches, entertainment venues or commercial buildings, the MA 4120 MKII offers multi zone audio routing coupled with four independent 120Wrms amplifiers. The MA 4120 MKII 4 zone mixer amplifier has five input channels, each with selectable independent output routing, input gain, treble bass and volume controls. Input channels 1 thru 4 are via XLR/Jack combo sockets, each with Line/Mic/Mic+Phantom selection, input channel 5 is via a stereo line level input. Four output zones each feature LED VU indicators, monitor selection and volume controls with outputs for line level, low impedance (4-8Ω) and constant voltage speaker systems (25V, 75V & 100V). The on-board monitor facility, selectable for each zone output features both a line level audio and 1W 8Ω loudspeaker output suitable for driving a loudspeaker local to the MA 4120 MKII zone mixer. • Four output zones each with level control and monitor selection Specifications MA 4120 480W Mixer Amplifier • Four independent 120Wrms amplifiers outputting to 4-8Ω or 25, 70, 100V Power output 4 x 120Wrms (4 x 240W peak) • Five input channels: Speaker outputs 25V, 70V, 100V and 4-8Ω Channels 1-4 are via XLR/Jack combo sockets, Sensitivity - CH1–4: —50dB (Mic/Phantom), each with Line/Mic/Mic+Phantom selection (48V)
  • Page 4 Panel & connection identification CH 1 CH 2 CH 3 CH 4 CH 5 MA 4120 MKII Mixer Ampli er GAIN GAIN GAIN GAIN GAIN ZONE 1 ZONE 2 POWER VOLUME VOLUME TREBLE TREBLE TREBLE TREBLE TREBLE BASS BASS BASS...
  • Page 5 Operating instructions Layout identification: 1. Gain control: The gain control is used to adjust the input gain (level) for each of the zone mixers input channels. Turn the level control anti clockwise to the lowest setting, or turn clockwise to adjust to the highest setting. Adjustments should be made gradually to avoid any sudden changes to the audio output. If the audio source appears to sound distorted, a reduction in gain may be required. 2. HF level control: During initial setup the high frequency tone adjustment should be set to the zero point (12’o’clock position). Turn the level control anti clockwise to reduce the high frequency tones, or turn clockwise to adjust the increase the high frequency tones. Adjustments should be made gradually to avoid any sudden changes to the audio output. 3. LF level control: During initial setup the low frequency tone adjustment should be set to the zero point (12’o’clock position). Turn the level control anti clockwise to reduce the low frequency tones, or turn clockwise to adjust the increase the high frequency tones. Adjustments should be made gradually to avoid any sudden changes to the audio output. 4. Mute switch: Press the mute switch to mute (silence) the selected input channel. 5. Mute LED: The mute LED provides a visual indication when the input channel is in mute status. 6. Input channel level control: The gain control is used to adjust the input gain (level) for each of the zone mixers input channels. Turn the level control anti clockwise to the lowest setting, or turn clockwise to adjust to the highest setting.

  • Page 6: Power Switch

    Operating instructions 10. LED VU output meter: The output to each zone may be monitored visually on the amplifier. The VU meter has three green stages, followed by amber and then red. Care should be taken to avoid the signal level reaching the amber or red zones as this will indicate a clipped signal within the zone mixer. In this instance, the Input Channel and/or Zone Output Level should be reduced. 11. Monitor level control: The monitor output volume is adjustable. Turn the level control anti clockwise to the lowest setting, or turn clockwise to adjust to the highest setting. This is used to control the volume for the 1W 8Ω loudspeaker output on the rear panel of the zone mixer. 12. Zone output level control: The master volume control affects all audio sources within the amplifier, routed to the selected zone. 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. 13. Monitor output selector: To route one of the output zones to the monitor & headphone outputs, press the Monitor selection button. The monitor output volume can then be adjusted using the Monitor Volume Control. 14. Power LED: The Power LED will illuminate to indicate the zone mixer is powered on. If the power LED is not illuminated, check first the position of the on/off switch and then check the mains (including fuse) or DC power supply. 15. Power switch: On/Off control for the zone amplifier. Note: The on/off power switch does not have any control over the 24V DC power input.
  • Page 7 Operating instructions 19. AC voltage selector: The MA 4120 MKII zone mixer features a dual voltage mains input. Disconnect the unit from the mains voltage power supply before attempting to change the mains input voltage. Care should be taken to select the appropriate mains input voltage to match that of the mains supply voltage. 20. Monitor (MIX) line output: The monitor line output can be used to feed external amplification or recording equipment. The Monitor line output provides an unbalanced (4V) signal following the front panel “monitor” selection. If several zones are selected, the output will be a mixed signal of all the selected zones. 21. Monitor loudspeaker output (1W 8Ω): Auxiliary connection for the connection of a small external loudspeaker for local monitoring purposes. The nominal output is 1W with a minimum impedance of 8Ω. If none of the output zones are selected using the monitor selection switches, the headphone output will be muted. 22. Priority control terminals (Music Mute): When the terminals are short-circuited by means of a switch or relay (ie fire alarm panel), input channels CH4 and CH5 will be muted, leaving input channels CH1, CH2 and CH3 with priority status. Note: The TEL input carries highest priority and will override the Priority (Music Mute) function. 23. Telephone/paging input (TEL): For emergency paging, the MA 4120 MKII is equipped with a balanced audio TEL input, activated automatically upon the MA 4120 MKII detecting an audio signal present on the TEL input terminals.

  • Page 8: Power On/Off Procedure

    Operating instructions 27. Input sensitivity and phantom power control: Channels 1, 2, 3 & 4 each feature switchable inputs for use with MIC/MIC+Phantom/Line signals. The MIC positition is designed to accept a balanced, low level signal from a standard dynamic microphone (5mV/1kΩ). The PHANTOM position is designed to provide 15V phantom power across XLR pins 2 & 3 for use with condenser microphones. The LINE position is for use with line level sources such as radio microphone receivers, CD players and FM tuners (100mV/10kΩ), the signal may be inputted using either the balanced XLR or balanced TRS 6.35mm (¼”) jack. 28. Balanced line level zone outputs: The MA 4120 MKII features four, independent zone outputs each utilising barrier strip terminals for the balanced audio output (1.7V). The line level outputs may be used to feed signal to external amplification where additional amplification is required. If the amplifier connected only requires an unbalanced signal, the output contacts “+” and “G” should be used. 29. Power amplifier outputs: Each of the four output zones on the MA 4120 MKII features both low impedance and constant voltage loudspeaker outputs. Each output zone may be used to output into either low impedance (4-8Ω) or constant voltage (25V, 70V, 100V). Do not use more than one pair of output terminals on any one output zone. Care should be taken when connecting to the outputs to ensure the load impedance is above the minimum load specified for the output. Power on/off procedure: Prior to making any connection to the mains power or audio inputs/outputs, turn all level controls counter clockwise to the “0” position and all tone (equaliser) controls to the mid (zero) point. Deselect all monitor and zone selection controls. Switch on the zone mixer and any audio sources (MP3 players, CD players, Microphones etc) before powering the systems amplifier ON. The last product to be switched on should be the power/slave amplifiers to prevent any unwanted noise or potential damage to speakers or amplifiers. If you wish...
  • Page 9 Operating instructions MIC priority: During normal operation the MA 4120 MKII features priority for MIC1 over the other microphone and line inputs. For certain applications, the installation engineer may need to defeat the MIC1 priority function. In order to do this, the product must be fully disconnected from any AC or DC power sources, and disconnected from all inputs/outputs. Remove the 15 screws from the outer casing as per the diagram below and keep in a safe location. Remove the upper casing and place to one side. Locate the PCB towards the rear of the unit as pictured below. Carefully move the jumper from the "ON" position to the "OFF" position. Refit the outer casing, taking care to avoid damaging the unit. Refit all of the screws to fully secure the outer casing. Top of Mixer Side 1 of Side 2 of Mixer Mixer Rear of Mixer www.cleveracoustics.co.uk MA 4120 480W Mixer Amplifier User Manual...
  • Page 10 Typical panel connections Contact “Voice Priority” Microphone Column speaker Desktop Mic Speaker Amplifier Horn Monitor speaker Speaker Recorder Mains PA Amplifier CD Player AM/FM Tuner Recorder www.cleveracoustics.co.uk MA 4120 480W Mixer Amplifier User Manual...

  • Page 11: Rack Installation

    Installation Rack installation: The MA series is rack mountable. The rack you use should be a double door rack where you can open the front and rear panel. When mounting the amplifier into the rack, please make sure that there is enough space around the amplifier. Be careful when mounting the amplifier into the rack. Put the heaviest products into the lower part of the rack. The front panel is not designed to absorb acceleration forces occurring during transportation. 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 amplifier supplies a clear sound reproduction. Unnecessarily long and thin cables used for low impedance (4-16Ω) speakers will influence 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. For longer cable runs please ensure the 100V outputs are used for 100V speakers. Connect your speaker systems via the speaker terminals (COM = -VE) Examples: 1) COM + 4-16Ω 2) COM + 70V 3) COM + 100V Note: Please do not use more than one pair of output terminals on any one output zone. www.cleveracoustics.co.uk MA 4120 480W Mixer Amplifier User Manual...

  • Page 12: Weee Notice

    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 4120 480W Mixer Amplifier User Manual...

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