Clever Acoustics ZM 84 User manual

ZM 84 Audio Mixer
User Manual
Order code: CRAM41
ZM 84
Audio Mixer
MIC/LINE 1 MIC/LINE 1 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4AUX 4
L
R
AUX 1 AUX 2 AUX 3 AUX 4 MASTER 1 MASTER 2
–∞
–∞
0 0
+6
+10 –∞+6 OFF
ON
POWER
-20
PEAK
SIG
–∞+10
PEAK
SIG
+20+100-10 -20 +20+100-10
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
dB
P
OUTPUT 4 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 AUDIO BUS OUT AUX 3 AUX 2 AUX 1
AUDIO BUS IN
OUTPUT 3
–∞+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
L
R
www.cleveracoustics.co.uk
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 ZM 84 Audio 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.
• Speaker&Ampliersystemscanproducehighsound
pressurelevels,pleaseoperateallcontrolswithcautionto
ensurepeoplearenotexposedtoexcessiveordangerous
soundpressurelevels.
• 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 ZM 84 Audio Mixer User Manual
3
Product overview & technical specications
TheZM84rackmountableaudiomixerfromCleverAcousticsisidealforpublicaddressandbackgroundmusic
systemswheremultipleinputsarerequired.Thefrontpanelfeatureseasytoadjustoperatorcontrolsplusaseries
ofrecessedengineercontrolsforbass,trebleandVOXpriority.
TheZM84mixerhas8inputchannels,eachwithadjustablevolumecontrols.Fourofthesechannelsaremono
mic/lineinputsviaXLRsockets,theotherfourchannelsareRCAlinelevelstereoinputs.Addingtothefeatures
theZM84hasa2bandEQforeachchannel,twomasteroutputsandafrontpanelmountedAUXinputideal
forMP3players.Internally,theZM84featuresacomprehensivejumpersystemforcongurationoftheoutput
routing,highpassltersandaudiobusin/outforlinkingmultipleZM84zonemixers.
•FourMIC/LINEXLRbalanced
inputseachwith80Hzhighpass
filter,switchable48Vphantom
power,-30dBpadandadjustable
gaincontrol
•MIC1inputfeaturesXLR
connectorslocatedonboth
thefrontandrearpanel
•FourstereoAUXunbalancedphono
inputchannels,threemountedon
therearpanel,onemountedonthe
frontpanel
•Eachinputchannelisequipped
withvolumecontrolandtonecontrol
•Signal/peakvalueLEDlightmonitors
foreachinputchannel
•Eachinputchannelcanbeassigned
toanyoutputchannelviatheinternal
jumpersystem
•MIC1/MIC2prioritycontroland
adjustablethresholdvalue
•FourXLRbalancedoutputs
withoutputs3and4inparallel
connectionwith2channelsof
RCAunbalancedoutputs
•FouraudioBUSbalancedinputs
viaRJ45whichcanberouted
intothemainXLRoutputswith
adjustablevolume
•FouraudioBUSbalancedoutputs
viaRJ45forlinkingtoadditional
ZM842zoneaudiomixers
•Fivesegment,LEDoutput
levelindicators
•Mutefunctionviacontactclosure
formutingallchannels
•Internalswitchmode,multivoltage
powersupply
•1U19”rackmountchassiswith
brushedaluminiumfrontpanel
ZM 84 Audio Mixer
Specications ZM 84 Audio Mixer
Powerconsumption 20W
Powersupply 100-240VAC50Hz/60Hz
Fuse T1A250V
Dimensions 44x484x238mm
Weight 3.9kg
Ordercode CRAM41
ZM 84
Audio Mixer
MIC/LINE 1 MIC/LINE 1 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4AUX 4
L
R
AUX 1 AUX 2 AUX 3 AUX 4 MASTER 1 MASTER 2
–∞
–∞
0 0
+6
+10 –∞+6 OFF
ON
POWER
-20
PEAK
SIG
–∞+10
PEAK
SIG
+20+100-10 -20 +20+100-10
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
44mm
484mm
238mm
ZM 84
Audio Mixer
MIC/LINE 1 MIC/LINE 1 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4AUX 4
L
R
AUX 1 AUX 2 AUX 3 AUX 4 MASTER 1 MASTER 2
–∞
–∞
0 0
+6
+10 –∞+6 OFF
ON
POWER
-20
PEAK
SIG
–∞+10
PEAK
SIG
+20+100-10 -20 +20+100-10
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
dB
P
OUTPUT 4 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 AUDIO BUS OUT AUX 3 AUX 2 AUX 1
AUDIO BUS IN
OUTPUT 3
–∞+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
L
R
www.cleveracoustics.co.uk
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 ZM 84 Audio Mixer User Manual
4
Panel & connection identication
16-ACMainsPowerInput
17-UnbalancedLineOutputs
–Zones3-4
18-BalancedLineOutputs
–Zones1-4
19-AudioBUSRJ45Input
20-EmergencyMuteFacility
21-AUX1-3UnbalancedStereo
LineLevelInputs
22-MIC/LineGain,PhantomPower
(+48V)and30dBPadControls
23-MIC/LineBalanced
AudioInputs
24-AudioBUSRJ45Output
25-AudioBUSRJ45Input
VolumeControl
01-MIC/Line1SignalInput
02-AUX4SignalInput
03-MIC/Line1-4ToneControl
04-MIC1Mute(VOAPriority)
Adjustment
05-MIC2Mute(VOAPriority)
Adjustment
06-AUX1-4ToneControl
07-Zone1MasterVolumeControls
08-OutputVUMeter
09-Zone2MasterVolumeControls
10-PowerIndicatorLED
11-MIC/Line1-4Signaland
OverloadLEDIndicators
12-MIC/Line1-4VolumeControls
13-AUX1-4Signaland
OverloadLEDIndicators
14-AUX1-4VolumeControls
15-PowerSwitch
ZM 84
Audio Mixer
MIC/LINE 1 MIC/LINE 1 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4AUX 4
L
R
AUX 1 AUX 2 AUX 3 AUX 4 MASTER 1 MASTER 2
–∞
–∞
0 0
+6
+10 –∞+6 OFF
ON
POWER
-20
PEAK
SIG
–∞+10
PEAK
SIG
+20+100-10 -20 +20+100-10
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
dB
P
OUTPUT 4 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 AUDIO BUS OUT AUX 3 AUX 2 AUX 1
AUDIO BUS IN
OUTPUT 3
–∞+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
L
R
www.cleveracoustics.co.uk
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
127 98 103
11 12
4 6
13 14
5
15
ZM 84
Audio Mixer
MIC/LINE 1 MIC/LINE 1 MIC/LINE 2 MIC/LINE 3 MIC/LINE 4AUX 4
L
R
AUX 1 AUX 2 AUX 3 AUX 4 MASTER 1 MASTER 2
–∞
–∞
0 0
+6
+10 –∞+6 OFF
ON
POWER
-20
PEAK
SIG
–∞+10
PEAK
SIG
+20+100-10 -20 +20+100-10
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
–∞+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
BASS
-15 +15
TREBLE
-15 +15
dB
P
OUTPUT 4 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 AUDIO BUS OUT AUX 3 AUX 2 AUX 1
AUDIO BUS IN
OUTPUT 3
–∞+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB–∞+10
L
R
www.cleveracoustics.co.uk
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
16 17 21 2318 19
24
20
25
22
Front Panel Layout:
Rear Panel Layout:

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
5
Layout identication:
1. MIC/Line 1 Signal Input
MIC/Line1signalinputisreplicatedfromtherearpanelontothefrontpaneloftheZM84foreaseof
access.MIC/Line/PhantomPowerselectionandgaincontrolforthisinputislocatedontherearpanel.
2. AUX 4 Signal Input
StereolinelevelinputviaL/Rfemalephono(RCA)sockets.
3. MIC/Line 1-4 Tone Control
Duringinitialsetupthehighfrequencyandlowfrequencytoneadjustmentsshouldbesettothezero
point(3O'clockposition).Turnthelevelcontrolanticlockwisetoreducethehigh/lowfrequencytones,
orturnclockwisetoadjusttheincreasethehigh/lowfrequencytones.Adjustmentsshouldbemade
graduallytoavoidanysuddenchangestotheaudiooutput.
4. MIC 1 Mute (VOX Priority) Adjustment
Microphoneinput1featuresautomaticpriority(VOX)overMIC/LINEchannels3&4plusAUXchannels
1-4.Toadjustthesensitivity,turnthepotentiometeranti-clockwisefortheclockwisetoreducethe
sensitivityorclockwisetoincreasethesensitivity.Note:whentheVOXpriorityisactivated,bothMIC/
Line1andMIC/Line2willbeactivated.WhentheVOXfunctionisactivated,theLEDindicatorwill
illuminateamber.
5. MIC 2 Mute (VOX Priority) Adjustment
Microphoneinput2featuresautomaticpriority(VOX)overMIC/LINEchannels3&4plusAUXchannels
1-4.Toadjustthesensitivity,turnthepotentiometeranti-clockwisefortheclockwisetoreducethe
sensitivityorclockwisetoincreasethesensitivity.Note:whentheVOXpriorityisactivated,bothMIC/
Line1andMIC/Line2willbeactivated.
6. AUX 1-4 Tone Control
Duringinitialsetupthehighfrequencyandlowfrequencytoneadjustmentsshouldbesettothezero
point(3O'clockposition).Turnthelevelcontrolanticlockwisetoreducethehigh/lowfrequencytones,
orturnclockwisetoadjusttheincreasethehigh/lowfrequencytones.Adjustmentsshouldbemade
graduallytoavoidanysuddenchangestotheaudiooutput.
7. Zone 1 Master Volume Controls
TheZone1masteroutputvolumeisadjustable.Turnthelevelcontrolanticlockwisetothelowest
setting,orturnclockwisetoadjusttothehighestsetting.
8. Output VU Meter
Theoutputlevelindicator(VUmeter)hasthreegreenLEDsandtwoamberLEDs.Duringnormal
operation,theoutputmetershouldshowonlygreenLEDs.Astheoutputreachesmaximum,therst
amberLEDwillilluminatefollowedbytheredLEDtoindicate+20dBoversignal.Careshouldbetaken
tokeeptheoutputsignalwithinthegreenLEDswithonlyoccasionalpeak’silluminatingtheamber
LEDs.IftheRed+20dBLEDisilluminated,theoutputvolumeshouldbereduced.
Operating instructions

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
6
Operating instructions
9. Zone 2 Master Volume Controls
TheZone2masteroutputvolumeisadjustable.Turnthelevelcontrolanticlockwisetothelowest
setting,orturnclockwisetoadjusttothehighestsetting.
10. Power Indicator 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supply
(includingfuse).
11. MIC/Line 1-4 Signal & Overload LED Indicators
Eachinputchannelfeaturesvisualindicationofsignalpresent,andsignaloverload.Toindicatewhen
asignalisinputtedintoachannel,thegreensignalLEDwillashorifthesignalisstrongtheLEDwill
illuminatefully.Whentheinputsignalistoohighforthepre-amplier,thesignaloverloadLEDwillash
red,indicatingareductioningainmayberequiredtopreventsignaldistortionorsystemdamage.
ForMIC/Lineinputs1-4thegainreductioncanbemadeusingthegainpotentiometerontherearpanel,
forAUX1-4thegainreductionmustbemadeatsourceorusinganin-lineattenuator.
12. MIC/Line 1-4 Volume Controls
EachoftheMIC/Linevolumesareadjustable.Turnthelevelcontrolanticlockwisetothelowestsetting,
orturnclockwisetoadjusttothehighestsetting.
13. AUX 1-4 Signal & Overload LED Indicators
Eachinputchannelfeaturesvisualindicationofsignalpresent,andsignaloverload.Toindicatewhen
asignalisinputtedintoachannel,thegreensignalLEDwillashorifthesignalisstrongtheLEDwill
illuminatefully.Whentheinputsignalistoohighforthepre-amplier,thesignaloverloadLEDwillash
red,indicatingareductioningainmayberequiredtopreventsignaldistortionorsystemdamage.For
AUX1-4channelsthegainreductionmustbemadeattheaudiosourceorusinganin-lineattenuator.
14. AUX 1-4 Volume Controls
EachoftheAUXvolumesareadjustable.Turnthelevelcontrolanticlockwisetothelowestsetting,
orturnclockwisetoadjusttothehighestsetting.
15. Power Switch
On/Offcontrolforthezonemixer.
16. AC Mains Power Input
240V~50HzACmainsvoltageinput.ThisproductfallsunderCLASS1andmusthaveaprotectiveearth
connectionatalltimes.
17. Unbalanced Line Outputs – Record outputs 3-4
Unbalanced,0dBumonooutputsforeachofthetworecordoutputs.Eachzoneoutputfeaturesa
femalephono(RCA)connector.Theoutputvolumefortherecordoutputsisxedandisnotalteredby
themastervolumecontrolforthezoneoutputs.

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
7
Operating instructions
18. Balanced Line Outputs – Zones 1-2
Balanced,+4dBumonooutputsforeachofthetwooutputzones.Eachzoneoutputfeaturesamale
XLRconnector.
19. Audio BUS RJ45 Input
TheZM84featuresanRJ45inputportforlinkingmultipleZM84zonemixers.Theinputvolumemay
beadjustedusingtheAudioBUSInputVolumeControl.
20. Emergency Mute Facility
TheemergencymutefacilityprovidessystemwideMUTEfunction.Toactivatethemutefacility,usea
contactclosureorrelaytoclosethecircuitbetweenthetwocontactsoftheEmergencyMuteport.
21. AUX 1-3 Unbalanced Stereo Line Level Inputs
AUXinputs1-3eachfeatureapairofunbalanced,phono(RCA)socketsforlinelevelinputfromaudio
sourcessuchasradiotuners,CDplayersorMP3players.
22. MIC/Line 1-4 Gain, Phantom power (+48V) and 30dB pad controls.
EachoftheMIC/Lineinputs1thru4allfeaturecontrolsforinputgain,phantompowerand30dB
attenuationpad.
• InputGain:Toallowtheinstallertomatchlevelsbetweenaudiosources,theZM84featuresa
rotaryinputgaincontrolforeachchannel.Turnthelevelcontrolanticlockwisetothelowestsetting,
orturnclockwisetoadjusttothehighestsetting.
• +48VPhantomPower:TheZM84featuresswitchablephantompoweroneachoftheMIC1-4
channelsforusewithcondensertypemicrophones.SelectionofPhantomPowerstatusshould
bemadebeforethezonemixerispoweredon.PhantomPowerreliesonbalancedcablingfor
correctoperation.
• -30dBAttenuationPad:Tofacilitatetheuseoflinelevelaudiosources,MIC/Lineinputs1-4each
featureaswitchable-30dBattenuationpad.Iftheinputsignalistoohighorknowntobefromaline
levelsource,theattenuationpadshouldbeswitchedonbypressingtheswitchtotheINposition.
• TheZM84featuresan80Hzlowcutlter,thiscanbeactivatedviatheinternaljumpersystem.
Todoso,aqualiedengineermustpowerdowntheunit,disconnectfrompowerandfollowthe
instructionsinthismanualtousethecorrectinternaljumper.
23. MIC/Line 1-4 Balanced Audio Inputs
MIC/Lineinputs1-4allfeaturebalanced,monoaudioinputs,eachwithselectablephantom
power(48V),-30dBattenuationpadandadjustableinputgain(-60dB~+10dB)forusewithMIC/
MIC+Phantom/Linesignals.
24. Audio BUS RJ45 Output
TheZM84featuresanRJ45outputportforlinkingmultipleZM84zonemixers.Theaudioroutingmay
beselectedviatheinternaljumpersystem.

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
8
Operating instructions
25. Audio BUS RJ45 Input Volume Control
ToadjusttheinputsignallevelontheAudioBUS,turnthelevelcontrolanticlockwisetothelowest
setting,orturnclockwisetoadjusttothehighestsetting.
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“min”positionandalltone(equaliser)controlstothemid(zero)point.
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“min”
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.

Internal Jumper System Conguration:
Cascading Multiple Units:
ViatheAUDIOBUSINandOUTconnectors16unitscanbecombinedtoonesystem
sothatyouhaveavailablemax.64MIC/LINEand48AUXinputs.
Theaudiosignalwillbefedtothenextunitviathe“AUDIOBUSOUT“output.
Viathemutelinkconnectorthedifferentmutesignalsarepassedtotheotherunits.Thisallows
i.e.thataVOXpriorityofMIC1notonlymutestheinputsoftheparticularunitbutalsotheinputs
oftheotherunits.
Byinternaljumpersyoucanselecttowhatexternalmutesignalsaparticularunitshouldreact.
Youndmoredetailsinchapter3.5.
Byshorteningthemutelinkconnectorallinputsofallconnectedunitswillbemuted.

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
9
Operating instructions
Positions of Jumpers:
B. Jumperformono/stereo
selectionofAUXinputs.
C. JumperforlowcutOn/Off
ofMicinputs.
D. Jumperforinputrouting.
E. JumperforMUTE-LINKmode.
Important Warning:The
internaljumpersystem
shouldonlybeadjustedby
aqualiedengineerwith
suitableelectricalknowledge.
Beforecommencinganywork
internally,theZM84should
bedisconnectedandisolated
fromtheelectricalsupply.

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
10
Low Cut:
FortheinputsMIC1-4a80Hz
lowcutltercanbeactivated
foreachchannelbysettingof
ajumper.
Factorysettingislter'OFF'.
Mono / Stereo:
FortheinputsMIC1-4a80Hz
lowcutltercanbeactivated
foreachchannelbysettingof
ajumper.
Factorysettingis'ST'(stereo).
Mute Link:
CongurationoftheMute-Linkfunctionsisdonebythesejumpers.
FactorysettingisjumperJ11.2,J11.3inOFF,andthejumperJ11.0
inONposition.
Signal Routing:
Everyaudioinputcanbe
individuallyassignedtoone
oftheinternalbusses.
Factorysettingisalljumpers
in'ON'position.
Thefunctionoftheparticular
jumperscanbeseenfromthe
blockdiagram.
Operating instructions
ON OFF
J11.1 Outputofinternalmutesignalsactivated Outputofinternalmutesignalsdeactivated
J11.2 OutputofexternalVOXsignalsdeactivated OutputofexternalVOXsignalsactivated
J11.3 OutputofexternalPRIOsignalsdeactivated OutputofexternalPRIOsignalsactivated

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
11
Block
Overview
Routing:
Block Diagrams

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
12
MIC 1 Block Diagram:
MIC 3 Block Diagram:
MIC 2 Block Diagram:
MIC 4 Block Diagram:
Block Diagrams

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
13
AUX 1 Block Diagram:
AUX 3 Block Diagram:
AUX 2 Block Diagram:
AUX 4 Block Diagram:
Block Diagrams

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
14
Block Diagrams
Block Diagram:
Pin Conguration:

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
15
Block Diagrams & Typical panel connections
Typical Panel Connections:EMER Block Diagram:
INSERT Block Diagram:

www.cleveracoustics.co.uk ZM 84 Audio Mixer User Manual
16
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.