Clever Acoustics MA 135 User manual

MA 135 100V 35W
Mixer Amplier
User Manual
Order code: CRAM31
OUTPUTS
FUSE:
T800mA 250V
POWER INPUT:
240V~50Hz
www.cleveracoustics.co.uk
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
PRIORITY
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
LINE 1 LINE 2
LINE 2
MIC 1
MIC 2
L
R
LINE 1
0
1
2
3
456
7
8
9
10 -10 +10 -10 +10 -10 +10
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
POWER CONSUMPTION: 38W (max.)

www.cleveracoustics.co.uk MA 135 Mixer Amplier 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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.
• 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 135 Mixer Amplier User Manual
3
Product overview & technical specications
Acompact,desktopmixerampliersuitableforsmallofces,retailspacesandgarageforecourts.Featuringtwo
microphoneinputsvia6.35mm(¼”jack)eachwithindependentlevelcontrols,twoswitchablestereoaudioinputs
andathreebandtonecontrol.Tofacilitatepaging,theamplierfeaturesaswitchablepriorityoverrideforMIC1.
•100Vandlowimpedance4-16Ωloudspeakeroutput
•Twounbalancedmicrophoneinputsvia6.35mm(¼”jack)
eachwithindependentlevelcontrols
•SwitchablepriorityforMIC1
•Phono-RIAA/LINEinputs(switchable)withlevelcontrol
•Threebandtonecontrol(150Hz,1kHz,6kHz)±10dB
•Mastervolumecontrol
•Screwterminalloudspeakeroutputswithtouchproofcover
•Captivepowerconnection
•Convectioncooledforsilentoperation
MA 135 100V 35W Mixer Amplier
OUTPUTS
FUSE:
T800mA 250V
POWER INPUT:
240V~50Hz
www.cleveracoustics.co.uk
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
PRIORITY
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
LINE 1 LINE 2
LINE 2
MIC 1
MIC 2
L
R
LINE 1
0
1
2
3
456
7
8
9
10 -10 + 10 -10 +10 -10 +10
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
POWER CONSUMPTION: 38W (max.)
Specications MA 135 Mixer Amplier
Poweroutput 35Wrms(70Wpeak)
Speakeroutput 100V&4-16Ω
Microphonesensitivity -55dB(±2dB)
Auxinputsensitivity -20dB(±2dB)
Frequencyresponse 100Hz-18kHz(±3dB)
Tonecontrol ±10dB
S/Nratio >55dB
THD <1%(@1kHz1Woutput)
Powerconsumption 38W(max.)
Powersupply 240VAC50Hz/12VDC(2.5A)
Fuse T800mA250V
Dimensions 84x320x235mm
Weight 5kg
Ordercode CRAM31
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
0
1
2
3
456
7
8
9
10 -10 +10 -10 +10 -10 +10
84mm
320mm
235mm

www.cleveracoustics.co.uk MA 135 Mixer Amplier User Manual
4
Panel & connection identication
01-Poweron/offswitch
02-PowerLED
03-Mastervolumecontrol
04-6kHztonecontrol
05-1kHztonecontrol
06-150Hztonecontrol
07-LINE1/LINE2levelcontrol
08-MIC1levelcontrol
09-MIC2levelcontrol
10-MIC1input
11-MIC2input
12-Fuse:T800mA250V
13-Captivepowerconnection
14-Prioritycontrolterminals
15-Loudspeakeroutputterminals
16-LINE1/LINE2selectorswitch
17-LINE1inputRCAconnectors
-LINELevel
18-LINE2inputRCAconnectors
-RIAAforTurntableConnection
19-Groundconnection
OUTPUTS
FUSE:
T800mA 250V
POWER INPUT:
240V~50Hz
www.cleveracoustics.co.uk
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
PRIORITY
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
LINE 1 LINE 2
LINE 2
MIC 1
MIC 2
L
R
LINE 1
0
1
2
3
456
7
8
9
10 -10 +10 -10 +10 -10 +10
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
POWER CONSUMPTION: 38W (max.)
8 9 67 5 4 31
2
OUTPUTS
FUSE:
T800mA 250V
POWER INPUT:
240V~50Hz
www.cleveracoustics.co.uk
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
PRIORITY
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
LINE 1 LINE 2
LINE 2
MIC 1
MIC 2
L
R
LINE 1
0
1
2
3
456
7
8
9
10 -10 +10 -10 +10 -10 +10
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
POWER CONSUMPTION: 38W (max.)
13 1514 16 18 11
19 17 1012

www.cleveracoustics.co.uk MA 135 Mixer Amplier User Manual
5
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.
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.
Tone control:
Thetonecontrolcanbeusedtoadjusttheoverallsoundfromtheamplier.Eachofthethreecontrols
adjustadifferentfrequencyband.Turnanti-clockwisetoincrease,orturnclockwisetodecreasethe
selectedfrequencyband.
Ground connection:
Thegroundconnectioncanbeusedforvinylturntablesourceswithexternalearthconnections.
Operating instructions

www.cleveracoustics.co.uk MA 135 Mixer Amplier User Manual
6
Microphone inputs:
Twolowimpedancemicrophoneinputsareprovided,eachlocatedontherear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.
Priority control terminals (Music Mute):
TheMA135amplierfeaturesapriorityfeatureformicrophone1.WhenthePrioritycontactsare
shorted,theamplierwillmuteallotherinputswhilemicrophone1willremainactive.
Line inputs:
Theamplierfeaturestwoaudioinputslocatedontherearpanel,eachinputfeaturesapairofRCA
(phono)inputconnectorsconguredinstereo.
TheLINE1inputisdesignedforlinelevelsources(150mV)suchasCDplayersorMP3players.
TheLINE2inputisdesignedforRIAAlevelsourcessuchasTurntables.
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1orslidetotherighttoLINE2.
Operating instructions
MIC
Unbalancedmicrophone Singlepolephoneplug
3mV
Selectorswitch
LINE1 LINE2
LINE1
RIAA
RIAA
Priority
–COM 8Ω+4Ω 16Ω 100V
LINE2
150mV
150mV

www.cleveracoustics.co.uk MA 135 Mixer Amplier User Manual
7
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.

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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Typical panel connections
OUTPUTS
FUSE:
T800mA 250V
POWER INPUT:
240V~50Hz
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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
PRIORITY
MA 135 Mixer Amplier EQUALISER
MIC 1
0
1
2
3
456
7
8
9
10 0
1
2
3
456
7
8
9
10
MIC 2
LINE 1/LINE 2 150Hz 1kHz 6kHz
LINE 1 LINE 2
LINE 2
MIC 1
MIC 2
L
R
LINE 1
0
1
2
3
456
7
8
9
10 -10 +10 -10 +10 -10 +10
0
1
2
3
4
5
6
7
8
9
10
MASTER VOLUME
POWER
ON
OFF
POWER CONSUMPTION: 38W (max.)
MAINS
TURNTABLE
LOUDSPEAKERS
MP3PLAYER
MIC1
MIC2
PRIORITY
RELAY

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9
Schematics
V R 1
A 50K
V R 2 A 50K
V R 3
A 50K
1
2 3
L
R
L
R
R 58 56K
R 61
10K
R 60 27K
R 13 5.6K
R 14 5.6K
R 16
2.2K
R 17
2.2K
R 15
10K
R 20
270 R 19
100K
R 24
330K
R 25 5.6K
R 22 18K
R 23
390K
R 20
270
R 21 680
C 18 470P
C 17
100P
C 15
(M C ) .0033U
C 16
(M C ) .015U
C 13 470
C 12
.001U
C 20
1U/50V
C 11
10U/16V
C 14
47U/25V
C 10
.001U
S1
Q3 C 1815
Q4
C 1815
R 41
100
R 40 1.2K
R 37 12K
R 38
8.2K
D4 4001
C 30 47U/25V
C 31
100U/50V
R 34
1W 2.2K
R 35
1W 47
R 36 10K
Q7 C 1815
Q8
C 1815
C 33
100U/50V
C 32
47U/25V
D5
1/2W 9.1V
R 39
4.7K
A C
1
A C
2
+3
-4
B 1
C 21
(M C ) .0047U
C 22
(M C ) .0047U
C 23
2200U/35V
C 24 2200U/35V
D1 4001
PT
P OW - SW
F U SE
A C 24OV
50H Z /50W
C 28
10U/16V
C N4
L E D POW
R 27 33K
R 29 47K
1K R 26
R 28
47K
C 25
10U/16V
C 26
22U/16V
Q5
C 1815
Q6
C 1815
C 29
33U/16V
R 32
33K
R 33
15 D2
4148
R 31 12K
R 30
12K
C 27
33U/16V
R 59
47K
R 62
82K
Q19
C 1815
Q20 C 1815
Q16 C 1815
Q17
C 1815
Q18
C 1815
Q14
D718
Q12
C 2240
Q13
A 1015
Q11
A 1015
Q9 C 2240 Q10
C 2240
R 82 22K
R 81
7.5K
R 83
7.5K
R 87
1K
R 86
7.5K
R 84
4.7K
R 67 1K
R 85 12K
R 68
33P
R 63
680
R 78
270K
R 79 10K
R 64 22K
R 65
3.9K
R 69 82K
R 71 820 R 70
5.6K
R 72 75K
R 73
680
R 80 10K
R 75 75K
R 76
820 R 77
5.6K
D12
4148
D13
1/2W 3V
C 58
100U/16V
C 57
10U/16V
C 40
.47U/50V
C 43
10U/16V
C 44
1U/50V
C 46
.47U/50V
C 55
(M C ) .033U
C 54
.22U/50V
C 53
1U/50V
C 38
10U/16V
C 56
10U/16V
V R 7
A 50K
V R 4
W 50K
V R 5
W 50K
V R 6
W 50K
6
5
7
U1B
M C 4558G 2
3
1
84
U1A
M C 4558G
C 41
33P
C 59
(M C ) .068U
C 45
150P
C 42 33P
C 49 33P
C 51 10P
C 48
(M C ) .015U
C 50
(M C ) .0022U
C 52
330P
R 66
3.9K
C 47
33P
R 74
5.6K
1 2
1 2
Q15 D718
R 49 4.7K
R 50
100
R 55
5W 0.2
R 51
10
R 47 150
R 48
4.7K
R 52
15
R 54
27K
R 53 100
R 43
2K
R 57
10
R 46
820
R 44
39K
R 45
5.6K
R 42 22K
D6
1W 18V
D7
4001
C 34
.47U/50V
C 37
22P
C 35
100U/50V
C 36
100U/50V
D11
4148
D10 4148 D9 4148
D8 4148
R 56
5W 0.2
OPT -30W
R 86
1W 10
1
2
COM 4 OH M 8 OH M
16 OH M
100V
CN9
C 39
100P
M1
M2
GND A U X GND OU T
M1 M2 GND
A U X
GND
OU T
OT
CN6
CN8
PR IO R I T Y
C N5 PT I N
OU T
+23V
-V C C
+V CC
A U X
PH ON O
1
2
3
4
5
6
CN7
1
2
3
4
5
6
CN2
!
!
!
!
!

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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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