Clever Acoustics MA 120 User manual

MA 120 100V 20W
Mixer Amplier
User Manual
Order code: CRAM30
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LINE 1/LINE 2
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TONE
MASTER VOLUME
POWER
ON
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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.)

www.cleveracoustics.co.uk MA 120 Mixer Amplier User Manual
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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modications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 modication 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ammable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qualied
engineerinspecttheequipmentbeforeoperatingagain.
• Iftheequipmenthasbeenexposedtodrastic
temperatureuctuation(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qualied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 Amplier User Manual
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Product overview & technical specications
Acompact,desktopmixerampliersuitableforsmallofces,retailspacesandgarageforecourts.The12VDC
inputallowstheamplier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 Amplier
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MA 120 Mixer Amplier
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LINE 1/LINE 2
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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.)
Specications MA 120 Mixer Amplier
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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LINE 1/LINE 2
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TONE
MASTER VOLUME
POWER
ON
OFF
LOW HIGH
84mm
320mm
235mm

www.cleveracoustics.co.uk MA 120 Mixer Amplier User Manual
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Panel & connection identication
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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LINE 1/LINE 2
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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.)
896754 3 1
2
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MA 120 Mixer Amplier
MIC 1 MIC 2 MIC 1
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MIC 2
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LINE 1/LINE 2
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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.)
11 1312 14 16
17 1510

www.cleveracoustics.co.uk MA 120 Mixer Amplier User Manual
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Mains voltage supply:
Beforeconnectingtheamplier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amplier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amplier
“ON”.Thelastproducttobeswitchedonistheamplier.Ifyouwishtopoweroffthesystem,turnthe
amplier’smastervolumecontrolcounterclockwisetothe“0”positionbeforeswitchingtheamplier
“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amplier,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amplier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amplier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amplier.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 Amplier User Manual
6
Tone control:
Thetonecontrolcanbeusedtoadjusttheoverallsoundfromtheamplier.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amplier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amplier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amplierisnotdesignedtodrivemultipleloadssimultaneously.



Operating instructions
MIC
Unbalancedmicrophone Singlepolephoneplug
3mV
Selectorswitch
LINE2 LINE2LINE1
LINE1
150mV
150mV

www.cleveracoustics.co.uk MA 120 Mixer Amplier User Manual
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Low impedance:
Theamplier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ampliersoutputterminalsoflower
impedancethanismarkedontheoutputterminals.
100V Line:
Forlongercableruns,theampliermaybeusedtodrive100Vloudspeakersystemsreducinglosses
withinthecable.Connectthe100Vlinelevelloudspeakersusingaparallelwiringcongurationtaking
caretoensuretheloadconnectedtotheamplieriswithin85%oftheampliers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 8Ω8Ω

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8
Typical panel connections
0
1
2
3
4
5
6
7
8
9
10
MA 120 Mixer Amplier
MIC 1 MIC 2 MIC 1
0
1
2
3
456
7
8
9
10
MIC 2
0
1
2
3
456
7
8
9
10
LINE 1/LINE 2
0
1
2
3
456
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
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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
0
1
2
3
4
5
6
7
8
9
10
MA 120 Mixer Amplier
MIC 1 MIC 2 MIC 1
0
1
2
3
456
7
8
9
10
MIC 2
0
1
2
3
456
7
8
9
10
LINE 1/LINE 2
0
1
2
3
456
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
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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

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Schematics
VR3
A50K
R31
18K
C33
100U/16V
C35
100U/16V
C32
.47U/50V
C36
.47U/50V
R32
2.2K
R33
2.2K
R29 5.6K
R28
1M
VR4
A20K
C34 220P
C37
(MC).033U
Q5
C1815
VR5
B50K
1
2
3
4
CN2
R30
1K
D1
4148 D2
4148
C38
220P
C39
100P
C40
(MC).1U
C18
(MC).1U
C19
(MC).1U
C20
(CC).1U
C11
2.2U/50V
C12
2.2U/50V C13
2.2U/50V
C14 4.7U/50V
C17
100U/16V
C15
100U/16V
C16
2.2U/50V
R11
560
R12
180K
R13 1.5K
R15
1W/1
R14 470
R16 4.7K
OPT
AUX
PHONO
R9
20K
R3
680
R10
3.3K
R4 2.7K
R1
100K
R5
47K
R6
1.8K
R7
56K
R2
330
R8
2.2K R17
470
R18
1W/1K R19
1.5K
C10
.001U
C3
220P
C5
(MC).047U
C7
68P
C6
(MC).022U
C1
.001U
C23
(MC).047U
C2
10U/16V
C4
10U/16V
C8
.47U/50V
C9 100U/16V C21
220U/25V
C22 4700U/50V
Q2
C1815
Q1
C1815
POW-SW FUSE
1A/250V
PT
AC 240V
50HZ 35W
D3 3A
LED
CN3
AC 1
AC 2
+
3
-
4
B1 BR106
S1
1
2
3
4
CN1
COM 4 OHM
8 OHM 16 OHM 100V
CN6
OT IN
1 2
1
2
CN4 CN5
DC IN 12V PT IN
VOL-PCB
POW PCB
AC
15.5V
1 2
+
-
KIA6280H
U1
R34 270
!
!
!
!

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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ofce,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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12