NAD CI9120 User manual

• 12x80WContinuousPower(6ohms),allchannelsdriven
simultaneously
• Multi-channelpowerampforcustominstallation
• Flex-Padallowseasysystemconguration
• Autologicturnoncircuit
• Outputmanagementcircuit(OMC)ensuresreliability
• Individualinputlevelcontrols
• EIArackmountkitincluded
• Quietlow-pressurecoolingsystem
loadsattachedtotheamplierfromheatingupexcessively,an
importantfactorwhentheliabilityofaninstalledsystemisa
consideration.WhentheOMCdetectsapotentialfaultsituation
andbeginstolimitcurrentow,anambercolouredLED
illuminatesonthefrontpaneltoalerttheinstallertoaproblem
inthesystem.WhentheOMCisactivated,theamplierwill
continuetoplaywithoutdistortion,butthepowerlevelwillbe
reducedtotheamplierchannelthathastheproblem.
Reliability
Everydesigndecision,boththeelectronicandmechanical,was
madewithabsolutereliabilityastheprimarygoal.Anauto-
resettingprotectioncircuitisalsopartoftheCI9120’sdesign.
Thefastactingprotectioncircuitjumpsintoactioniftheamplier
overheadsorencountersadeadshortcircuitcondition.Ared
frontpanelLEDindicatesthattheprotectioncircuithasbeen
activated.Whentheconditionisnormalizedtheamplierresets
toStandbycondition.Intheunlikelyeventofamplierfailure,
theCI9120isdesignedtobeeasilyeldserviceablewithall
amplifyingcircuitrymountedonplug-inmodules.
Lowpressurecooling
WiththeCI9120’shighlyefcientlow-pressurecoolingsystem,
itisveryunlikelythattheprotectionsystemwilleverencounter
anoverheatingsituation.High-volume,low-pressure,fans
keepboththepowersupplyandtheoutputstagecool,yetare
essentiallyquietinoperation.Thermostaticallycontrolled,the
fansautomaticallyadjusttotheambienttemperaturetoinsure
theoptimumoperatingconditionsfortheamplieratalltimes.
Flexibility
TheidealCustomInstallationampliernotonlyhastohave
absolutereliabilityandgreatsoundquality,butitalsomust
beexibleenoughtointerfacecorrectlywithavarietyofother
devices,andoftendiversesystemrequirements.NANhas
developedtwouniquefeaturesthatendowtheCI9120with
exceptionalexibility.
Flex-Pad
TheFlex-PadallowstheCI9120todrivefrom1to12
independentzones,inanycongurationofstereoormono(orin
mixedcombination),withoutresortingtotheconfusion,sonic
CI912012-ChannelPowerAmplier
TheNADCI9120isaclean-sheetdesign12
channelamplierspecicallyengineeredtomeetthe
demandingrequirementsoftheadvancedcustom
installationmarket.Theresultofthisintensive
designeffortisanamplierthatsetsnewstandards
for“bullet-proof”reliabilityandsonicperformancein
thisspecializedcategory.
Power
Manoftheampliersdesignedformulti-zone
distributedaudioarejustnotpowerfulenough.
TheCI9120at80WattsContinuouspowerper
channel,boastsnearlydoublethepowerofmost
othercompetingampliers.Thisisverycritical,
becauseunlikeanormalhi-amplierthatonlyhas
tosenditssignaltospeakersacrossroom,custom
installationsoftendemandthatthesignalbesent
fromoneendofthehometotheother.Theseries
resistanceoflongrunsofspeakerwirecombined
withimpedance-matchedvolumecontrolscancreate
specialdemandsonanamplierthattheCI9120
hasbeendesignedtoovercome.
OMC
NAD’sproprietaryOutputManagementCircuit
(OMC)ensuresthatthefullpowerisavailableatany
reasonableloadimpedance.Iftheloadimpedance
fallsbelow3ohms,indicatingsomethingotherthan
aloudspeakerisconnectedtotheamplierchannel,
theOMCwilllimitthepowerowandpreventthe
amplierfromoverdrivingoroverheating.Thisis
notonlyprotectstheamplier,butitalsoprevents

degradation,andquestionablereliabilityofswitches.Instead,the
Flex-Padusesthetriedandtruepatch-bayconcepttocongurethe
amplierchannels.Thecongurationisvisuallyobvious,makingiteasier
fortechnicianstosetupthesystemandtotroubleshootforsystemerrors.
Thesuppliedpatchcablescanbeeasilyreconguredorreplaced.This
canbeespeciallyimportantandcangreatlysimplifyfutureservicecalls
yearsdowntheroad(especiallyifsystemdocumentationismissingor
incomplete).
ATOLogic
TheCI9120canbeturnedoninanyoneofthreeways,forcomplete
systemexibility:
1. Fromthefrontpanelswitch.
2. Viathe12volttriggercircuit.
3. Byaswitchable“sleep/wake”signal-sensingcircuit.
ThisismanagedbytheAutomatedTurn-OnLogic(ATOLogic)circuitthat
requirestheampliertobeswitchedbacktostandbyinthesamemanner
bywhichitwasactivated.Inotherwords,ifitisswitchedonviaa12V
controlsignal,itcannotbeswitchedtostandbyviathefront-panelswitch,
itmustwaitforthe12Vsignal.
Summary
Highpower,bullet-proofreliability,absoluteprotectionandsafety,
combinedwithexibilityandNADsoundqualitymaketheCI9120
uniqueintheworldofcustominstallation.Verysmallphysicalsizeand
thestandardrackmountkit(3U)arejusticingonthecake(TheCI9120’s
littlebrother,the6channelCI9060isthesamephysicalsize,makingthe
futureexpansioneasy).Individualleveltrimsforeachchannelhelpmake
installationfasterandeasier.Thisisanewkindofamplierthatbrings
NAD’scorevaluesofperformance,value,andsimplicitytothecustom
installationmarketplace.
NADElectronicsInternationalreservestherighttochangespecicationsorfeatureswithoutnotice.NADisaregisteredtrademarkofNADElectronics
International.Allrightsreserved.Nopartofthispublicationmaybereproduced,stored,ortransmittedinanyformwhatsoeverwithoutthewritten
permissionofNADElectronicsInternational.©02/04NADElectronicsInternational.
www.NADelectronics.com
SPECIFICATIONS
Continuous Power, 20Hz-20kHz, all channels
driven simultaneously at 4/6Ω
Total Harmonic Distortion
20Hz-20kHz at rated power
Clipping Power (0.1% THD)
IHF dynamic power at 6Ω
IHF dynamic power at 4Ω
IM Distortion (SMPTE 60Hz+7kHz)
IM Distortion (CCIR 19kHz+20kHz)
Damping factor (6Ω, 20Hz-20kHz)
12 x 80W
0.03%
90W
85W
90W
>0.08%
>0.08%
31
Input impedance
Input sensitivity
Voltage gain
Frequency response -3dB at: 75W
Signal/noise ratio; ref 1W
Physical Specifications
Dimensions (W x H x D)
Net Weight
Shipping Weight
25kΩ
1.1 volts for 8W/6Ω
28dB
5Hz to 45kHz
89dB
17 3/16 x 5 1/4 x 17 3/4”
(435 x 133 x 450 mm)
80 lbs (36.5kg)
90 lbs (41kg)