Clever Acoustics CRAM34 User manual

Brand
Clever Acoustics
Model
CRAM34
Category
Musical Equipment
Type
User manual

This manual is also suitable for

Clever Acoustics CRAM34 is a 4-zone mixer designed for venues that require multiple zones and external amplification, like schools, churches, entertainment venues, or commercial buildings. It features five input channels, each with independent output routing, gain, treble, bass, and volume controls. Input channels 1-4 have XLR/Jack combo sockets with Line/Mic/Mic+Phantom selection, while channel 5 has a stereo line-level input.

Clever Acoustics CRAM34 is a 4-zone mixer designed for venues that require multiple zones and external amplification, like schools, churches, entertainment venues, or commercial buildings. It features five input channels, each with independent output routing, gain, treble, bass, and volume controls. Input channels 1-4 have XLR/Jack combo sockets with Line/Mic/Mic+Phantom selection, while channel 5 has a stereo line-level input.

ZM4 4 Zone Mixer
User Manual
Order code: CRAM34
ZM4 4 Zone Mixer
PHANTOM
LINE MIC
DC 24V 450mA
+
LINE OUT - BAL/UNBAL
ZONE 1 G – +
LINE OUT - BAL/UNBAL
ZONE 2 G – +
LINE OUT - BAL/UNBAL
ZONE 3 G – +
LINE OUT - BAL/UNBAL
ZONE 4 G – +
VOLUME
Z1
Z3
Z2
Z4
CH 1
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 2
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 3
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 4
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 5
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
ON
OFF
POWER
VOLUME
ZONE 3
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ZONE 1 ZONE 2
ZONE 4
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
0 10
PHONE
PHONE
VOLUME
MONITOR
VOLUME
0 10
MONITOR
LINE OUTPUT
G +
MONITOR
1W 8Ω
PRIORITY
– +
TEL PAGING
COM GNDHOT
POWER INPUT:
110-240V~50/60Hz
110-120V~60Hz - FUSE: T6.3A 250V
220-240V~50/60Hz - FUSE: T3.15A 250V
110-120V~ 220-240V~
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
www.cleveracoustics.co.uk
TEL
VOLUMEZONE
CH4 CH2
CH1CH3
L
R
CH5
LINE
PHANTOM
LINE MIC
PHANTOM
LINE MIC
PHANTOM
LINE MIC
SERIAL NUMBER
POWER CONSUMPTION (max.): 22W
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
www.cleveracoustics.co.uk ZM4 4 Zone Mixer 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ACor24V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 ZM4 4 Zone Mixer User Manual
3
Product overview & technical specications
TheZM4ZoneMixerisidealforsystemswheremultiplezonesarerequiredandwillbeampliedutilisingexternal
amplication.Designedforuseinvenuessuchasschools,churches,entertainmentvenuesorcommercial
buildings.TheZM4zonemixerhasveinputchannels,eachwithselectableindependentoutputrouting,input
gain,treblebassandvolumecontrols.Inputchannels1-4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.Theon-boardmonitor
facility,selectableforeachzoneoutputfeaturesa1W8Ωloudspeakeroutputsuitablefordrivingaloudspeaker
localtotheZM4zonemixer.Foreaseofinstallation,theoutputconnectorsforeachzonefeaturephoenixstyle
screwterminalsofferingabalancedsignalforoutputtoexternalamplication.
•Fouroutputzoneseachwithlevelcontrol
andmonitorselection
•Fiveinputchannels:
Channels1-4areviaXLR/Jackcombosockets,each
withLine/Mic/Mic+Phantomselection
Channel5isviaphono(RCA)stereolinelevelinput
•3U,19”rackmountchassis
•Inputgain,treble,bassandlevelcontrols
•Selectableoutputroutingforallinputchannels
•MonitorfunctionwithlevelcontrolandLEDVUmeter
•Outputformonitorloudspeaker:1W,8Ω
•Headphoneoutputwithlevelcontrol
•Telephone/paginginput(zoneselectable)
withadjustablelevel
•PriorityinputfortelephoneandMIC1
(musicmutefacility)
•LinelevelMIXoutput
ZM4 4 Zone Mixer
ZM4 4 Zone Mixer
PHANTOM
LINE MIC
DC 24V 450mA
+
LINE OUT - BAL/UNBAL
ZONE 1 G – +
LINE OUT - BAL/UNBAL
ZONE 2 G – +
LINE OUT - BAL/UNBAL
ZONE 3 G – +
LINE OUT - BAL/UNBAL
ZONE 4 G – +
VOLUME
Z1
Z3
Z2
Z4
CH 1
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 2
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 3
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 4
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 5
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
ON
OFF
POWER
VOLUME
ZONE 3
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ZONE 1 ZONE 2
ZONE 4
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
0 10
PHONE
PHONE
VOLUME
MONITOR
VOLUME
0 10
MONITOR
LINE OUTPUT
G +
MONITOR
1W 8Ω
PRIORITY
– +
TEL PAGING
COM GNDHOT
POWER INPUT:
110-240V~50/60Hz
110-120V~60Hz - FUSE: T6.3A 250V
220-240V~50/60Hz - FUSE: T3.15A 250V
110-120V~ 220-240V~
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
www.cleveracoustics.co.uk
TEL
VOLUMEZONE
CH4 CH2
CH1CH3
L
R
CH5
LINE
PHANTOM
LINE MIC
PHANTOM
LINE MIC
PHANTOM
LINE MIC
SERIAL NUMBER
POWER CONSUMPTION (max.): 22W
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
Specications ZM4 4 Zone Mixer
Inputsensitivity/
impedance
-CH1–3:5mV/4kΩ(Mic),100mV/10kΩ(line)via
combiXLR/6.35mm(1/4”)jack
-Phantompower:15V
-CH4-5:100mV/30kΩ(line)unbalancedstereophono
-TEL.paging-40mV–1.5V/5kΩunbalancedscrew
terminals
Frequencyresponse 20Hz-22kHz(±2dB)
THD <0.03%(@1kHz1Woutput)
Powerconsumption 22W(max.)
Powersupply 110-240V~50/60Hz
ACor24VDC
Fuse T3.15A250V
Dimensions 135x484x210mm
Weight 4.6kg
Ordercode CRAM34
ZM4 4 Zone Mixer
Z1
VOLUME
Z3
Z2
Z4
CH 1
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
Z1
VOLUME
Z3
Z2
Z4
CH 2
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
Z1
VOLUME
Z3
Z2
Z4
CH 3
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
Z1
VOLUME
Z3
Z2
Z4
CH 4
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
Z1
VOLUME
Z3
Z2
Z4
CH 5
0
1
2
3
4
5
6
7
8
9
100
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
0 10
PHONE
PHONE
VOLUME
MONITOR
VOLUME
0 10
VOLUME
ZONE 3
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ZONE 1 ZONE 2
ZONE 4
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ON
OFF
POWER
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
135mm
484mm 210mm
www.cleveracoustics.co.uk ZM4 4 Zone Mixer User Manual
4
Panel & connection identication
ZM4 4 Zone Mixer
PHANTOM
LINE MIC
DC 24V 450mA
+
LINE OUT - BAL/UNBAL
ZONE 1 G – +
LINE OUT - BAL/UNBAL
ZONE 2 G – +
LINE OUT - BAL/UNBAL
ZONE 3 G – +
LINE OUT - BAL/UNBAL
ZONE 4 G – +
VOLUME
Z1
Z3
Z2
Z4
CH 1
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 2
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 3
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 4
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 5
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
ON
OFF
POWER
VOLUME
ZONE 3
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ZONE 1 ZONE 2
ZONE 4
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
0 10
PHONE
PHONE
VOLUME
MONITOR
VOLUME
0 10
MONITOR
LINE OUTPUT
G +
MONITOR
1W 8Ω
PRIORITY
– +
TEL PAGING
COM GNDHOT
POWER INPUT:
110-240V~50/60Hz
110-120V~60Hz - FUSE: T6.3A 250V
220-240V~50/60Hz - FUSE: T3.15A 250V
110-120V~ 220-240V~
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
www.cleveracoustics.co.uk
TEL
VOLUMEZONE
CH4 CH2
CH1CH3
L
R
CH5
LINE
PHANTOM
LINE MIC
PHANTOM
LINE MIC
PHANTOM
LINE MIC
SERIAL NUMBER
POWER CONSUMPTION (max.): 22W
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
51 2 3 4 7 9 11 13
6 8 8 10 12
ZM4 4 Zone Mixer
PHANTOM
LINE MIC
DC 24V 450mA
+
LINE OUT - BAL/UNBAL
ZONE 1 G – +
LINE OUT - BAL/UNBAL
ZONE 2 G – +
LINE OUT - BAL/UNBAL
ZONE 3 G – +
LINE OUT - BAL/UNBAL
ZONE 4 G – +
VOLUME
Z1
Z3
Z2
Z4
CH 1
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 2
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 3
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 4
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
VOLUME
Z1
Z3
Z2
Z4
CH 5
0
1
2
3
4
5
6
7
8
9
10
-10 +10
-10 +10
-10 +10
ON
OFF
POWER
VOLUME
ZONE 3
MONITOR
0
1
2
3
4
5
6
7
8
9
10
ZONE 1 ZONE 2
ZONE 4
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
VOLUME
MONITOR
0
1
2
3
4
5
6
7
8
9
10
0 10
PHONE
PHONE
VOLUME
MONITOR
VOLUME
0 10
MONITOR
LINE OUTPUT
G +
MONITOR
1W 8Ω
PRIORITY
– +
TEL PAGING
COM GNDHOT
POWER INPUT:
110-240V~50/60Hz
110-120V~60Hz - FUSE: T6.3A 250V
220-240V~50/60Hz - FUSE: T3.15A 250V
110-120V~ 220-240V~
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
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TEL
VOLUMEZONE
CH4 CH2
CH1CH3
L
R
CH5
LINE
PHANTOM
LINE MIC
PHANTOM
LINE MIC
PHANTOM
LINE MIC
SERIAL NUMBER
POWER CONSUMPTION (max.): 22W
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
LF
HF
GAIN
15 14 17 23 24 25 26
16 18 19 20 21 22 24 25
01-Gaincontrol
02-HFlevelcontrol
03-LFlevelcontrol
04-Inputchannellevelcontrol
05-Zoneselectionswitches
06-Headphonelevelcontrol
07-Headphoneoutput
08-LEDVUoutputmeter
09-Monitorlevelcontrol
10-Zoneoutputlevelcontrol
11-Monitoroutputselector
12-PowerLED
13-Powerswitch
14-ACmainspowerinput
15-ACmainsfuse
16-ACvoltageselector
17-24VDCpowerinput
18-Monitor(MIX)lineoutput
19-Monitorloudspeakeroutput
(1W8Ω)
20-Prioritycontrolterminals
21-Telephone/paginginput(TEL)
22-Telephone/paginginput
zoneselection&volumecontrol
23-StereoLINEinputs
24-MonoMIC/LINEinputs
25-Inputsensitivityandphantom
powercontrol
26-Balancedlinelevelzoneoutputs
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Layout identication:
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. 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.
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.Theinputchannellevelcontrol
adjuststheleveloftheselectedinputchannelwithinthemainmix.
5. Zone selection switches:
Eachoftheveinputchannelsmayberoutedtoanyofthefouroutputzones.
PresstheswitchtotheINpositiontoroutetheselectedinputchanneltothechosenoutputzone.
6. Headphone level control:
Theheadphoneoutputvolumeisadjustable.Turnthelevelcontrolanticlockwisetothelowestsetting,
orturnclockwisetoadjusttothehighestsetting.
7. Headphone output:
Utilisingastandard3.5mmstereojacksocket,theheadphoneoutputisusedalongsidethemonitor
functiontochecktheoutputofindividualoutputzones.Ifnoneoftheoutputzonesareselectedusing
themonitorselectionswitches,theheadphoneoutputwillbemuted.
8. LED VU output meter:
Theoutputtoeachzonemaybemonitoredvisuallyontheamplier.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.
Operating instructions
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Operating instructions
9. 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.
10. Zone output level control:
Themastervolumecontrolaffectsallaudiosourceswithintheamplier,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.
11. 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.
12. Power LED:
ThePowerLEDwillilluminatetoindicatethezonemixerispoweredon.IfthepowerLEDisnot
illuminated,checkrstthepositionoftheon/offswitchandthencheckthemains(includingfuse)orDC
powersupply.
13. Power switch:
On/Offcontrolforthezoneamplier.Note:Theon/offpowerswitchdoesnothaveanycontroloverthe
24VDCpowerinput.
14. AC mains power input:
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.
15. AC mains fuse:
Disconnectfromthemainspowersupplybeforeattemptingtoreplacethemainsfuse.Replacement
mainsfusesmustbethesameratingastheoriginal.T3.15AL250Vfor220-240VACmainssupplyor
T6.3AL250Vfor110-120VACmainssupply.
16. AC voltage selector:
TheZM4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.
17. 24V DC power input:
TheZM4zonemixerfeaturesa24VDC(600mA)powerinputforoperationfromaDCbackuppower
supply.WhenboththeDCandACpowerinputsareconnected,theZM4willoperateusingtheACmains
powerinputandautomaticallyswitchtoDCoperationshouldtheACpowersupplyfail.Careshouldbe
takentoobservethepolarityandfuserequirementswhenconnectingtheDCpowersource.
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Operating instructions
18. Monitor (MIX) line output:
Themonitorlineoutputcanbeusedtofeedexternalamplication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.
19. 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monitoroutputwillbemuted.
20. Priority control terminals (Music Mute):
Whentheterminalsareshort-circuitedbymeansofaswitchorrelay(iere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.
21. Telephone/paging input (TEL):
Foremergencypaging,theZM4isequippedwithabalancedaudioTELinput,activatedautomatically
upontheZM4detectinganaudiosignalpresentontheTELinputterminals.Theinputcarriesthe
highestpriorityandwilloverrideallotherinputs&priorityfunctionsontheamplier.
22. Telephone/paging input zone selection & volume control:
TheTELinputfeatureszonecontrolandinputvolumecontrol.ToroutetheTELsignaltoadesired
outputzone,movethecorrespondingDIPswitchtothedown(ON)position.Theinputvolumeforthe
TELsignalmaybecontrolledbytherecessedvolumecontrolpotentiometer.Formostapplications,it
maybebestpracticetosettheminimumpossibleleveltopreventunwantedactivationofthepriority
input.Turnthepotentiometerclockwisetoincreasethevolume.
23. Stereo LINE inputs:
AstereoaudioinputisprovidedforsourcessuchasFMTuners,CDPlayersorMP3Players.Theinput
featuresapairofunbalancedphono(RCA)inputssuitableforlinelevelaudioinput.
24. Mono MIC/LINE inputs:
Channels1,2,3&4allfeaturemonoaudioinputs,eachwithselectorforusewithMIC/MIC+Phantom/
Linesignals.TheaudioinputisdesignedtoacceptabalancedaudiosignalviaXLRor6.35mm(¼”)
TRSjack.
25. 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position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.
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Operating instructions
26. Balanced line level zone outputs:
TheZM4featuresfour,independentzoneoutputseachutilisingaphoenixtypeterminalblockforthe
balancedaudiooutput(1.7V).Iftheamplierconnectedonlyrequiresanunbalancedsignal,theoutput
contacts“+”and“G”shouldbeused.Whenconnectingtheoutputs,theterminalblockmayberemoved
fromtheZM4foreaseoftermination.
(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.
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amplierON.Thelastproducttobeswitchedonshouldbethepower/slave
amplierstopreventanyunwantednoiseorpotentialdamagetospeakersorampliers.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system,adjustthelevelofeachaudioinput,
selectthezoneroutinginordertoachievethedesired“mix”foreachzone.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.
www.cleveracoustics.co.uk ZM4 4 Zone Mixer User Manual
9
Operating instructions
MIC priority:
DuringnormaloperationtheZM4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12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.Rettheoutercasing,
takingcaretoavoiddamagingtheunit.Retallofthescrewstofullysecuretheoutercasing.
TopofMixer
RearofMixer
Side1ofMixer Side2ofMixer
www.cleveracoustics.co.uk ZM4 4 Zone Mixer User Manual
10
Typical panel connections
Battery
Mains
Recorder
Recorder
PAAmplier
PAAmplier
Horn
speaker
Horn
speaker
Column
speaker
Column
speaker
Speaker
Speaker
Recorder
CDPlayer
AM/FMTuner
24V
Recorder
DesktopMic
Microphone
Speaker
Amplier
Contact
“VoicePriority”
Recorder
PAAmplier
PAAmplier
Horn
speaker
Horn
speaker
Column
speaker
Column
speaker
Speaker
Speaker
www.cleveracoustics.co.uk ZM4 4 Zone Mixer User Manual
11
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.
www.cleveracoustics.co.uk ZM4 4 Zone Mixer User Manual
12
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Clever Acoustics CRAM34 User manual

Brand
Clever Acoustics
Model
CRAM34
Category
Musical Equipment
Type
User manual
This manual is also suitable for

Clever Acoustics CRAM34 is a 4-zone mixer designed for venues that require multiple zones and external amplification, like schools, churches, entertainment venues, or commercial buildings. It features five input channels, each with independent output routing, gain, treble, bass, and volume controls. Input channels 1-4 have XLR/Jack combo sockets with Line/Mic/Mic+Phantom selection, while channel 5 has a stereo line-level input.

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