1200W POWER AMPLIFIERwit h INTEGRATED DSP

1200W POWERAMPLIFIER withINTEGRATED DSPModel: APA1200DSP User Manual

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WARNING! TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

CAUTION! TO REDUCE THE RISK OF SHOCK, DO NOT REMOVE THE COVER, NO USER SERVICABLE PARTS INSIDE. REFER SERVICE TO A DAYTON AUDIO AUTHORIZED DEALER.

IMPORTANT SAFETY INSTRUCTIONS

• Readandkeeptheseinstructions.

• Heedallwarningsandfollowallinstructionscontainedwithinthismanual.

• Donotusethisunitnearwater.

• Cleanonlywithdrycloth.

• Donotblockanyventilationopenings.Installinaccordancewiththemanufacturer’sinstructions.

• Donotinstallnearanyheatsourcessuchasradiators,heatregisters,stoves,orotherapparatus(including amplifiers)thatproduceheat.

• Donotdefeatthesafetypurposeofthepolarizedorgrounding-typeplug.Apolarizedplughastwobladeswith onewiderthantheother.Agroundingtypeplughastwobladesandathirdgroundingprong.Thewidebladeor thethirdprongareprovidedforyoursafety.Iftheprovidedplugdoesnotfitintoyouroutlet,consultan electricianforreplacementoftheobsoleteoutlet.

• Protectthepowercordfrombeingwalkedonorpinchedparticularlyatplugs,conveniencereceptacles,andthe pointwheretheyexitfromtheunit.

• Onlyuseattachments/accessoriesspecifiedbythemanufacturer.

• Unplugthisunitduringlightningstormsorwhenunusedforlongperiodsoftime.

• Referallservicingtoqualifiedservicepersonnel.Servicingisrequiredwhentheunithasbeendamagedinany way,suchaswhenthepower-supplycordorplugisdamaged,liquidhasbeenspilled,orobjectshavefalleninto theunit,theunithasbeenexposedtorainormoisture,doesnotoperatenormally,orhasbeendropped.

• Operatetheunitonlywiththevoltagespecifiedontherear.Fireand/orelectricshockmayresultifahigher voltageisused.

• Donotmodify,kink,orcutthepowercord.Donotplacethepowercordincloseproximitytoheatersanddonot placeheavyobjectsonthepowercordand/ortheunititself,doingsomayresultinfireorelectricalshock.

• Donottouchthespeakerterminalsaselectricshockmayresult.

• Ensurethatthesafetygroundterminalisconnectedtoaproperground.Neverconnectthegroundtoagaspipe, asasevereexplosionand/orfiremayresult.

• Besuretheinstallationofthisproductisstable,avoidunlevelsurfacesastheproductmayfallandcauseinjury, propertydamage,electrocutionand/orfire.

• Notethatwhentheunitisturnedoff,itisnotcompletelydisconnectedfromtheACpoweroutlet.Donotopen thecover.

REFER ALL SERVICE TO A QUALIFIED SERVICE TECHNICIAN

Safety

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ATTENTION!POURRÉDUIRELERISQUED'INCENDIEOUDECHOCÉLECTRIQUE,N'EXPO-SEZPASCETAPPAREILÀLAPLUIEOUÀL'HUMIDITÉ.

ATTENTION! POUR RÉDUIRE LE RISQUE DE CHOC ÉLECTRIQUE, NE RETIREZ PAS LE COUVERCLE, AUCUNE PIÈCE RÉPARA-BLEPARL'UTILISATEURNESETROUVEÀL'IN-TÉRIEUR.ADRESSEZ-VOUSÀUNREVENDEURAGRÉÉDAYTONAUDIO.

CONSIGNESDESÉCURITÉIMPORTANTES

• Lisezetconservezcesinstructions.

• Tenezcomptedetouslesavertissementsetsuiveztouteslesinstructionscontenuesdanscemanuel.

• N'utilisezpascetappareilàproximitédel'eau.

• Nettoyez-leuniquementavecunchiffonsec.

• N'obstruezpaslesouverturesdeventilation.Installezl'appareilconformémentauxinstructionsdufabricant.

• Nel'installezpasàproximitédesourcesdechaleurtellesqueradiateurs,bouchesdechaleur,poêlesouautres appareils(ycomprislesamplificateurs)quiproduisentdelachaleur.

• Nepascontrecarrerl'objectifdesécuritédelafichepolariséeoudelafichedeterre.Unefichepolariséepossède deuxlamesdontl'uneestpluslargequel'autre.Uneprisedeterreadeuxlamesetunetroisièmebrochedemise àlaterre.Lalamelargeoulatroisièmebrochesontprévuespourvotresécu-rité.Silafichefournienes'adapte pasàvotreprisedecourant,consultezunélectricienpourremplacerlapriseobsolète.

• Protégezlecordond'alimentationpouréviterqu'onmarchedessusouqu'ilsoitpincé,enparticulierauniveaudes fiches,desprisesdecourantetdupointdesortiedel'appareil.

• N'utilisezquelesaccessoiresspécifiésparlefabricant.

• Débranchezcetappareilpendantlesoragesoulorsqu'iln'estpasutilisépendantdelonguespériodes.

• Confieztouteslesopérationsd'entretienàunpersonnelqualifié.L'entretienestnécessairelorsquel'appareilaété endommagédequelquemanièrequecesoit,parexemplelorsquelecordond'alimenta-tionoulaficheesten dommagé,qu'unliquideaétérenverséouquedesobjetssonttombésdansl'appar-eil,quel'appareilaétéexposé àlapluieouàl'humidité,qu'ilnefonctionnepasnormalementouqu'ilesttombé.

• Nefaitesfonctionnerl'appareilqu'aveclatensionindiquéeàl'arrière.L'utilisationd'unetensionplusélevéepeut entraînerunincendieet/ouunchocélectrique.

• Nemodifiezpas,nepliezpasetnecoupezpaslecordond'alimentation.Neplacezpaslecordond'alimentationà proximitédesappareilsdechauffageetneposezpasd'objetslourdssurlecordond'alimentationet/ousur l'appareillui-même,carcelapourraitprovoquerunincendieouuneélectrocution.

• Netouchezpaslesbornesdeshaut-parleurs,carvousrisqueriezderecevoirunchocélectrique.

• Assurez-vousquelabornedeterredesécuritéestconnectéeàuneterreappropriée.Neconnectezjamaislaterre àuneconduitedegaz,carcelapourraitprovoqueruneexplosionet/ouunincendie.

• Assurez-vousquel'installationdeceproduiteststable,évitezlessurfacesnonplanescarleproduitpeuttomberet causerdesblessures,desdommagesmatériels,uneélectrocutionet/ouunincendie.

• Notezquelorsquel'appareilestéteint,iln'estpascomplètementdéconnectédelaprised'alimentationCA. N'ouvrezpaslecouvercle.

CONFIERTOUTEINTERVENTIONÀUNTECHNICIENDESERVICEQUALIFIÉ

SécuritéRISQUE DE CHOC ELECTRIQUE

NE PAS OUVRIR

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Thank you for purchasing the Dayton Audio® APA1200DSP 1200 Watt Power Amplifier with integrated DSP!

What is Included:APA1200DSPPowerCableUser ManualAutoEQMicrophone

Features • Networkingcapabilityforconvenientcontrolviaanydevicewithawebbrowser• AutomatedRoomEQcorrectionalgorithmforconnectedsubwoofers• On-boardcontrolpanelwithLCDdisplayandstatusLEDs• PowerfulDSPfeaturesconfigurablewithaweb-basedGUIorrightontheunititself • LowPassFilter(LPF) • HighPassFilter(HPF),usableasasubsonicfilter • ParametricEQ(PEQ),upto8bandsperchannel • PhaseControl • LineOutputHighPassandDelayformainsintegrationwithaconnectedsubwoofer • Limiter• EfficientClassDoutputtopology• Balancedandunbalancedlinelevelinputsandoutputs• Digital COAX input• LineOutputwithhighpassfilteranddelayforconnectingexternalamplifiers

Table of ContentsFront Panel Diagram ..................................................................................................................................................... 5Rear Panel Diagram ...................................................................................................................................................... 6Navigating and Adjusting Parameters with the Onboard GUI ........................................................................................ 7Onboard GUI Menu Screens ......................................................................................................................................... 8Network Connection and Accessing the Web Based GUI ............................................................................................. 10Web GUI Overview ..................................................................................................................................................... 11

Volume / Phase / Input ............................................................................................................................. 12LPF Menu (Low Pass Filter) ........................................................................................................................ 13HPF Menu (High Pass Filter) ....................................................................................................................... 14PEQ Menu (Parametric Equalizer) .............................................................................................................. 15

PEQ Filters Configuration ........................................................................................................... 16Limiter Menu ............................................................................................................................................ 17Line Out Settings ....................................................................................................................................... 18Presets ...................................................................................................................................................... 19Auto EQ Function ...................................................................................................................................... 20

Auto EQ Menu .......................................................................................................................... 21Auto EQ Troubleshooting .......................................................................................................... 22

Power Saving Page .................................................................................................................................... 23Load Selection ........................................................................................................................................... 24Network Configuration Page ...................................................................................................................... 25About Page ................................................................................................................................................ 25

Specifications ............................................................................................................................................................. 26Troubleshooting ......................................................................................................................................................... 27

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Front Panel

A. LEDs1. Limiter LED:Lightsredwhenevertheamplifierreachestheconfigurablevoltagelimit. Limiterwillalsobeactivated(lightsup)duringthefollowingconditions: I.Overload II.Overtemperature III.Speakershortcircuit2. On LED:Lightsgreenwhenthedeviceisturnedonandoperatingnormally.3. Standby LED:Lightsredwhentheamplifierentersstandbymode.

B. LCD Display: Displaysstatusinformationandmenustoallowcompletecontrolofthedevicewiththecontrolknob.AllparametersfoundinthesemenuscanalsobeadjustedwiththewebGUIaftermakinganetworkconnection.

C. Adjustment/Set Control Knob:Rotatingtheknobmovesthroughthedevice’smenuoradjuststhecurrentlyselectedparameterup ordown.1. Pressingthedialonceselectsagivenparameteroradvancesfurtherintothemenu(goforward).2. Quicklypressingthedialtwicereturnstothepreviouspageorpreviouslevelofthemenu(gobackward).3. Longpressingthecontrolknobcanbringupextrafunctions,dependingonthemenu.Forexample,

longpressinginsomemenuswillallowyoutolinkorunlinkchannels.

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Rear Panel

A. Mic In:MicrophoneinputforautoroomEQcalibration(Note:Usethemicrophonethatcamewiththedevice.Thesoftwareiscalibratedfortheincludedmic,andresultsWILL VARYifadifferentmicisused.)

B. LAN: ConnectyourAPA1200DSPtoanetwork(viaarouterornetworkswitch)withastandardethernetpatchcabletoenableremotecontrolofalldevicesettingsviaanywebbrowserofadeviceonthesamenetwork.

C. DC12V Trigger:12VDCinputtoturnon/offtheAPA1200DSPwithanexternalcontroldevice.D. Power On Setting: Thereare3possiblemodesforthissetting.

1. ON:Thedevicewillremainonatalltimesaslongastheunitisconnectedtopowerandthepowerswitchontherearofthedeviceisswitchedon.

2. Auto: Iftheamplifierdoesnotdetectananaloginputsignalgreaterthanthethresholdselectedinthepowersavingmenu,itwillautomaticallyenterstandby.IfyouwanttowakeupinAutomode,youcaninputamusicsignalovertheselectedthresholdorselecttheONmode.NOTE:Thismodeshouldnotbeusedifthedigitalcoaxconnectionisused,asthedigitalcoaxconnectioncannottriggerthedeviceoutofstandby.

3. 12V Trigger:WillconfirmthatthereisnoaudiosignalandDC12Vbeforeenteringstandby.Ifyouwanttowakeupunder12VTrigger,youcaninputDC12VorselectON.

E. Digital Input:CoaxDigitalAudioInput.(SPDIF)F. Input:AnalogRCAx2orXLRx2.G. Input Attenuation Switch:Adjustbetween-10dbV(900mVmaxinputbeforeclipping)

and-4dBV(1.8Vrmsbeforeclipping)H. Preamplifier Output:AnalogRCAx2orXLRx2.I. Speaker Output:Bindingpostx4.

2OhmMinimumforStereoConfiguration 4OhmMinimumforBridgedConfiguration

J. Power Switch:TurnOn/Offtheamplifier.K. Power:Connecttheincludedpowercord(IEC60320-C13)

CAUTIONRISK OF ELECTRONIC SHOCK DO NOT OPEN

AVIS:RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR

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Navigating and Adjusting Parameters with the Onboard GUIItispossibletoadjustmostparametersoftheAPA1200DSPontheunititselfviathedisplayandcontrolknob.Forinitialsetupofthedevice,itisrecommendedtoconnecttotheweb-basedGUI(seethenextsection),astheonboardGUIisbetterformakingquickadjustmentsonthefly,ratherthanmanyadjustmentsatonce.Formoreinformationabouteachmenuoptionandparametertype,seethecorrespondingsectionslaterinthisguide.Instructions:

1. Rotating the dialwillmovetothenextmenuoptionorincrease/decreaseavaluedependingonthecurrentcontextofthemenu.Thecurrentlyselectedparameterwillbehighlighted.

2. Pressing the dialonceselectsagivenparameteroradvancesfurtherintothemenu(goforward).3. Quickly pressing the dial twicereturnstothepreviouspageorpreviouslevelofthemenu(gobackward).

Forexample,ifyouareinthePEQmenu,youwillclicktheknoboncetoselectaparametersuchasfrequen-cy.Youcanthenrotatethedialtochangethisfrequency.Whenyouaredone,pressthedialtwicetogoback,allowingyoutoselectadifferentparametertochange.

4. Long pressing the control knobinthemenusofvolume,LPF,PEQ,HPF,PhaseDegreeandlimiter willallowyouto‘link’theAandBchannelstogether,whichmeansthatallparameterswithinthemenuwillaffectbothchannels.Longpressingagainwillallowyouto‘unlink’thechannelsandcreateindividualsettingsforeachchannel.

i.

ii. Indicates linked channels

iii. Indicatesunlinkedchannels(channelAisselected)

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Onboard GUI Menu ScreensBelowiseachpossiblemenuscreenusingtheAPA1200DSP’sonboardmenusystem.Theleftmostcolumnare‘mainmenu’options,andthefollowingcolumnsarefoundbypressingthedialwhilethemainmenuitemisselected.Quicklypressthedialtwicetogoback.

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Onboard GUI Menu Screens

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Network Connection and Accessing the Web Based GUITheweb-basedGUIwillallowcontrolofallfunctionsoftheamplifierthroughthewebbrowserofanydeviceonthesamenetwork(cellphone,laptop,tablet,etc).

Steps:1. ConnecttheAPA1200DSPtoarouterornetworkswitchviaastandardethernetpatchcable.Plugoneendofthe

patchcableintoyourrouter/switch,andplugtheotherendintotheLANportonthebackoftheAPA1200DSP(TheAPA1200DSPcannotbeattachedtoyournetworkviaWi-Fi,howeverWi-Fidevices,suchasalaptop,canwirelesslyaccesstheAPA120DSP’swebGUI).Note: TheAPA1200DSPwillworkwithoutanexternalinternetcon-nection,meaningthenetworkneedstobeestablished,butitdoesnotrequireconnectiontoaserviceprovider.

2. Oncethedeviceisconnectedtothenetworkviaethernet,thewebinterfacecanbereachedusinganydevicewithawebbrowseronthesamenetworkastheAPA1200DSP(laptop,cellphone,tablet,desktop,etc).Enterhttp://APA1200DSP/intotheaddressbarofyourbrowsertoconnecttothebrowserGUI.Note: IfmultipleAPA1200DSPunitsareonyournetwork,thislinkcannotbeused,andyoumustfollowthenextsteptofindtheuniqueIPaddressofeachdevice.

3. ThebrowserGUIcanalsobeaccessedbydirectlyenteringtheIPaddressofyourAPA1200DSPintoyourwebbrowser.ThisIPaddresscanbefoundbyenteringthedeviceinfoscreenusingthebuilt-indisplayashighlightedbelow.EntertheIPaddressintotheaddressbarofyourwebbrowser.

Network TroubleshootingA. If using the link http://APA1200DSP/andyoucannotmakeaconnection,tryfollowingstep3abovetofindtheIP

addressofyourdevice,andconnecttoyourdevicebyenteringtheIPaddressintoyourwebbrowser.B. MakesurethatyouareusingadevicethatisonthesamenetworkasyourAPA1200DSPtoaccesstheinter-

face.ThedeviceyouareusingforaccesscanbeconnectedeitherthroughWi-Fi,likealaptop,ordirectlytothenetworkwithapatchcablelikeyoumightdoonadesktopPC.Insomesituations,especiallyinbusinesses,theremightbemultipleWi-Finetworksinthebuilding,andtheoneyouareconnectingtomightnotbethesameactu-alnetworkastheethernetportyoupluggedyourAPA1200DSPto.

C. Tryadifferentethernetpatchcable.MakesureyourAPA1200DSPispoweredon.D. Tryresettingyourrouter.E. IfyourbrowserisconnectingtothewebGUIbutyouareexperiencingadelayortheinterfaceisveryslow,see

thefollowingsteps.1. DisconnectanyotherwebbrowserfromtheAPA1200DSP’swebinterface.Onlyconnectonebrowser

atatimetoyourAPA1200DSPforoptimalperformance.2. Ifusingawirelessdevice(likealaptoporcellphone)toaccesstheGUIaccesstheAPA1200DSP’s

interface,makesurethattheconnectionisstableandstrong.3. Tryrestartingthedevice.Tryusingthe“globalreset”optioninthepresetsmenu(ifyouhavepresets

youwanttosave,savethepresettoyourPC,becausepresetsstoredontheAPA1200DSPwillberesetafterpressing“globalreset”

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Web GUI Overview

TheseGUIelementswillalwaysbepresentwhileusingtheAPA1200DSP’swebinterface.Enterdifferentmenusbyclickingmenuitemsontheleftsideofyourscreen.

A. Menu – DisplaysallmenuoptionsavailableontheAPA1200DSP.Clickonthetextofeachmenuitemtoenterthatmenu.The“Home”sectionofthemenucanbecontractedorexpandedbyclickingonit.

B. Level Meter - DisplaysinputandoutputlevelsindB.Ifyouarenotgettinganyoutputfromyourconnect-edspeaker,butyouseethatthereisoutputfromthelevelmeter,checktheconnectionfromtheamptoyourspeaker.

1. The“M”buttonsnexttotheoutputlabelcanbeusedtomutetheoutputofyourAPA1200DSP.C. Output Mode – Setyourdevicetoeither“Sub”or“Stereo”mode.

1. Sub – ThismodeshouldbeusedwhenasubwooferisattachedtotheAPA1200DSPinbridgedmode.ThismodeallowstheAutoEQfunctiontobeused.

2. Stereo -Thismodeshouldbeusedforstereoconfigurations,oranytimeaspeakerisnotconnectedtotheAPA1200DSPinbridgedmode.AutoEQmodeisdisabledinthismode.

D. System Information – Displaysusefulinformationsuchasthesystemuptime,currentpreset,andIPad-dressoftheAPA1200DSP.

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Volume / Phase / Input

A. Input Source – SwitchtheinputsourcebetweenanalogandSPDIFinput.B. Channel Mode-Changewhichchannelthesettingsaretobeapplied.Linkmodewillapplythesameset-

tingstobothchannel,butyoucanalsosetindividualsettingsforeachchanneliftheAPA1200DSPisusedinstereomode.

C. Volume – Dragtheslidertoincreaseordecreasetheamplifier’soutputvolume.Thearrowbuttonscanalsobepressedforgranularvolumecontrol.Therangeis-99dBto0dB.

D. Phase – Dragtheslidertoincreaseordecreasetheamplifier’sphase.Thearrowbuttonscanalsobepressedforgranularcontrol(incrementordecrementby5°).Therangeoftheslideris0° to 180°.

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LPF Menu (Low Pass Filter)

LPFstandsfor“LowPassFilter”.Thisisthetypeoffilterthatisusedtopreventasubwooferfromplayinghighfrequencies,butthisisnottheonlyuseoftheLPF.Forexample,ifIsetalowpassfilterat100Hz,frequencieslowerthan100Hzwill“pass”,butfrequenciesgreaterthan100Hzwillbeattenuatedbyaspecifiedslope.LPFsareessentialforsubwoofers,becauseitallowsthesubwoofertoonlyplaythelowfrequenciesofyouraudiosource.

A. Graph – Showsagraphicalrepresentationoftheappliedlowpassfilter.B. Channel Mode-Changewhichchannelthefilteristobeappliedto.Linkmodewillapplythesamefilter

toboth,butyoucanalsosetindividualfiltersforeachchannel(AandorB)iftheAPA1200DSPisusedinstereomode.

C. Enable / Disable the LPFD. Filter Settings

1. Slope–Options:6dB,12dB,24dB,36dB2. Frequency-Range:20Hz–20,000Hz

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HPF Menu (High Pass Filter)Subsonic Filter

HPFstandsfor“HighPassFilter”.Thistypeoffilterwillcutlowfrequenciesoutofanaudiosignal,allowingfrequencieshigherthantheselectedfrequencyto‘pass’.Thisfiltercanalsobeusedasa“SubsonicFilter”.Thistypeoffilterisahighpassfiltersettofilteroutverylowfrequencies,anditeasestheloadonaspeakersystembycuttingoutfrequenciesfromthesignalthatthesystemcannotplay/cannotplaywell.Thiscanhavenumerousadvantagesinpowerhandlingandevenclarityofaudio,dependingonthesystem.

A. Graph – Showsagraphicalrepresentationoftheappliedhighpassfilter.B. Channel Mode-Changewhichchannelthefilteristobeappliedto.Linkmodewillapplythesamefilter

toboth,butyoucanalsosetindividualfiltersforeachchannel(AandorB)iftheAPA1200DSPisusedinstereomode.

C. Enable / Disable the LPFD. Filter Settings

1. Slope–Options:6dB,12dB,24dB,36dB2. Frequency-Range:16Hz–20,000Hz

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PEQ Menu (Parametric Equalizer)

TheparametricEQ(PEQ)menuallowsforupto8bandsofcustomequalization,andalsoallowscustomizationoftheEQgeneratedfromthe“AUTOEQ”functionoftheAPA1200DSP.AllfiltersareimplementedasinfiniteimpulseresponseorIIRfilters,whichisstandardformostPEQinterfaces.

A. EQ Control Buttons1. Disable All EQ – TurnsOFFallEQbands.Doesnotresetvalues.Usefulfordoingbeforeandafter

comparisonswithEQ.2. Enable All EQ – TurnsONallEQbands.Doesnotchangevalues.Usefulfordoingbeforeandafter

comparisonswithEQ.3. Reset All EQ – ResetsallEQvaluestodefault(flat).Doesnotchangeenabled/disabledstatus.There

willbeaslightdelay.B. Graph-ThegraphwillshowtheeffectsofallenabledEQbands.EachenabledEQbandwillhaveitsown

correspondingpurpleandyellowdotsonthegraphforeasycontrol.1. Purple Dot–DragthedottochangethefrequencyandgainvaluesofeachenabledEQband2. Yellow Dot–DragtheyellowdottochangetheQvalueofeachenabledEQband.Movingthe

yellowdotawayfromthecorrespondingpurpledotwillreducetheQvalue,andmovingtheyellowdottowardsthepurpledotwillincreasetheQvalue.(LargerQvalueswillaffectasmallerrangeoffrequencies,smallerQvalueswillaffectalargerrangeoffrequencies)

C. Channel Mode-Changewhichchannelthefilteristobeappliedto.Linkmodewillapplythesamefiltertoboth,butyoucanalsosetindividualfiltersforeachchannel(AandorB)iftheAPA1200DSPisusedinstereomode.

D. See next pageE. See next page

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PEQ Filters Configuration

The5BandPEQwillbeautomaticallysetupbytheAUTOEQmodeofthisamplifier,butvaluescanbechangedatanytime.The3BandPEQwillnotbeaffectedbyAUTOEQ.Clickanynumberinthismenutotypeaspecificvalue.

1. Freq–SetsthefrequencyofeachEQbandi. Range:20Hzto20,000Hz

ii. ControllablebydraggingthepurpledotofeachEQbandhorizontally.2. Gain–SetsthegainofeachEQband.

i. Range:-12dBto+6dBii. ControllablebydraggingthepurpledotofeachEQbandvertically.

3. Q –SetstheQvalueofeachEQband.ThiswillaffecttherangeoffrequenciestheEQbandwillaffect.i. Range:0.4to14

ii. Lowervalueswillaffectalargerrangeoffrequencies.Highervalueswillaffectanarrow-errangeoffrequencies.

iii. ControllablebydraggingtheyellowdothorizontallyforeachcorrespondingEQband4. Type –TypeislockedtoPEAKforthe3bandPEQ.The5-BandPEQhas5optionsforfiltertype

1. Peak 4. Notch2. TrebleShelf 5. LPF3. Bass Shelf 6. HPF

5. Enable –TheboxatthebottomofeachbandenablesordisableseachEQband.Itwillgloworangewhenenabled,orgreywhenitisdisabled

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Limiter MenuThelimiterisatoolthatwillallowinputsignalsbelowthegiventhresholdtopassthroughtheamplifierun-affectedbutwillattenuatesignalsiftheyarehigherthanthethreshold.Thelimiteronlyrespondstoactualclipping,andautomaticallycompensatesforloadandvoltagevariations.Thistoolcanbeparticularlyusefulforprotectingdrivers.ThelimiterLEDonthefrontofthedevicewillilluminatewhenlimitingisactivelyoccurring.

A. Channel Mode-Changewhichchannelthelimiteristobeapplied.Linkmodewillapplythesamelimitingtoboth,butyoucanalsosetindividuallimitforeachchannel(AandorB)iftheAPA1200DSPisusedinstereomode.

B. Threshold – Setthethresholdofthelimiter.Signalsbelowthisthresholdwillpassthroughunaffected,butsignalsabovethisthresholdwillbelimited.0dBeffectivelymeansthelimiterisOFF.

1. Range: -99dBto0dBC. Attack – Determineshowquicklylimitingisappliedtotheinputsignal.Alowervaluemeansafaster at-

tack,andthelimiterreactsquicklytoasignalthathaspeakedabovethethresholdvalue.1. Range: 1msto100ms

D. Release – Determineshowquicklythelimiterstopsaffectingthesignal.Thelowerthevalue,thequickerthelimiterwillstopreactingtoasignalthatpeakedabovetheselectedthreshold.

1. Range:90msto3000ms

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Line Out SettingsThispageallowsyoutoadjustvarioussettingsthataffectthelineoutputpassthroughoptionontheAPA1200DSP.ThismenuisparticularlyusefulifyouareusingtheAPA1200DSPasasubwooferamplifierandwouldliketohighpassyourmainspeakerstopreventinteractionbetweenthebassfromyourmainsandthebassfromyoursubwoofer.DoingthiswillalsoensureamoreaccuratesimulatedresultwhenusingtheAUTOEQfunctionofthisdevice.

A. Graph–Showsagraphicalrepresentationofthelineoutput.Ifyouhaveenabledthehighpassfilter(HPF),youwillseeitrepresentedinthisgraph.

B. HPF Enable – Turnsthehighpassfilterforthelineoutonoroff.C. HPF Slope – Changestheslopeofthehighpassfilter.

1. Options: 6dB, 12dB, 24dB, 36dBD. Delay – Addsanoptionaldelaytoyourlineoutput.Thiscanbeusefulfortimealigningyoursubwoofer

andmains.1. Range:0msto10ms

E. Frequency –Range:31Hz–125Hz

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Preset MenuPresetsareparticularlyusefulforquicklychangingmanysettingsontheflyfordifferentusecases,orwhileprototypingEQandfiltersettings.Presetscaneitherbesavedtotheamplifieritself,ortothecomputerthatthewebGUIisrunningon.Thismenualsoletsyouresettodefaultvalues.Notethatpresetswillnotaffectorsavethesettingsofinputtype(analogorcoax),powersavingsettings,orloadselection.

A. To Amp Preset Options – ThesepresetswillbestoredontheAPA1200DSPunititself.Theunitcanstoreupto20uniquepresetswithcustomizablenames.

1. DropdownMenu–Selectyourdesiredpresetorpresetslotfromthisdropdownmenu.Ifloadingorsavingapreset,thisselectionwillbetheslotsavedtoorloadedfrom.

2. EditNameField–Enteryourdesirednameforthepresethere.Thisisthenamethatwillbesavedwhen“SavePre-Set”isselected.

3. SavePre-SetButton–Thisbuttonwillsaveallcurrentsettingsandparameterstoapresetthatcanbeloadedatanytime.Thepresetwillsaveintothecurrentlyselectedpresetslot(itwilloverwritethepresetstoredinthisslot).

4. LoadPre-SetButton–Thisbuttonwillloadallofthesettingsandparametersthatwereoriginallysavedintoyourselectedpreset.Itwilloverwriteanyofyourcurrentsettings.

B. Reset–Thisbuttonwillresetthecurrentlyselectedpreset.ItwillalsoresetallyouractiveDSPsettings(LPF,HPF,PEQ,Limiter,LineOutSettings).

C. To Computer Preset Options–ThesepresetswillbedownloadedtowhicheverdeviceyouareusingtoconnecttotheAPA1200DSP’swebinterface.Afterpressingsave,theGUIwillpromptyoutogiveyourfileanameandtochoosebetween.txtor.csvfiletypes(eitherisOK).

1. SaveButton–ThisbuttonwillsavethecurrentsettingsontheAPA1200DSPintoafilethatcanbestoredonthecomputer.

2. LoadButton–Thisbuttonwillallowyoutoloadapresetfromyourcomputerthatwaspreviouslycreatedwiththesavebuttonnexttoit.

D. Global Reset – Thisbuttonwillresettheentiredevicetofactorydefaults,removingallpresetsandothersettings.Theinterfacewillrebootafewmomentsafterthisbuttonispressed.

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Auto EQ FunctionTheAPA1200DSPoffersapowerfullowfrequencyautoEQprocessforsubwoofersconnectedinSUB(bridged)mode.Bytaking5measurementsthroughoutaroomoraroundalisteningposition,thesoftwarewillgainanunderstandingofthecombinedresponseofthesubwooferwithinyourroom.Withthisunderstanding,thedevicewillgenerate5bandsofEQtotrytogenerateasignificantlyflatterbassresponsethroughouttheroomorlisteningposition.

Youwillbeaskedtoplacethemicrophonein5differentlocationsduringthisprocess.Thelocationsyouchooseareuptoyouandwhatyouaretryingtoachievewiththecorrection.Ifyouwouldlikethebassresponsetobeeventhroughouttheentireroom,choose5locationsspreadacrosstheroomtogetanaverageresponsefortheroom.Ifyouwouldlikethebassresponsetobeasbestasitcanbeinasinglelisteningposition,movethemicrophoneforeachmeasurement,butkeepitclosetothelisteningposition.(thiswillusuallyhavenegativeimpactonthesubwoofer’ssoundintherestoftheroombutcanhavegreatresultsinasinglelisteningposi-tion).

FollowingtheautoEQprocess,5bandsofEQwillbeappliedtotheconnectedspeaker(thiscorrectiondoesNOTaffectthelineoutfrequencyresponse).These5bandsofEQwillbemodifiableviathe“PEQ”menuop-tion.Youwillseethe“5BandEQ”willmatchtheresultsofyourautoEQandallowyoutofurthermodifythecorrectiontoyourliking.

Before you start1. Setyourdesiredhighpassandlowpassfiltersforyoursubwoofer.Thesehighpassandlowpassfilters

willaffectyourmeasurements.Forexample,ifyouintendonusingasubsonicfilter(HPF)foryoursub-woofer,youcansetthatbeforetakingmeasurements,orchoosetodothemeasurementswithouttheHPFenabled.

2. NotethatallPEQwillbedisabledduringthemeasurementprocess,andanyvaluesinthe5BandPEQwillbereset.

3. REDUCE YOUR OUTPUT VOLUME USING THE PROVIDED SLIDER.Eventhoughyoursubwoofermightnotbeoverloadedortooloudwhileplayingmusic,thetestsignalsusedformeasurementswilllikelybemuchlouderthanyourinputsource.Toensuretheprotectionofyoursubwoofer,reducethevolumesignificantlybeforetakingyourfirstmeasurement.Youcanthenrestartthemeasurementprocesswithahighervolumeifthevolumewastoolow.

4. UseonlythemicrophoneprovidedintheboxwiththeAPA1200DSP.Whilealternativemicrophonesmightfunctionwiththedevice,theautoEQprocesswascalibratedspecificallywiththestyleofmicro-phonethatcamewithyourdevice,andresultswillvaryifusingalternativemic.

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Auto EQ Menu

A. Graph – Oncethemeasurementprocesshasbeencompleted,thisgraphwilldisplaytheresponseasmea-sured(greyline)andthesimulatedresponsewithEQapplied(blueline).ThelocationsofeachEQbandcanalsobeseenlabeledwithacolorednumberandcoloreddashedlines.

1. Dropdown Menu –Selectyourdesiredpresetorpresetslotfromthisdropdownmenu.Ifloadingorsavingapreset,thisselectionwillbetheslotsavedtoorloadedfrom.

B. Volume Slider – ThisisthesamemastervolumesliderthatcanbefoundintheVolume/Phase/Inputmenu.Ithasbeenduplicatedheretoallowthevolumetobequicklyreducedbeforetakingmeasure-ments.

C. EQ Results – ThecalculatedresultsoftheautoEQprocesscanbefoundhere.EachnumberrepresentsabandofEQ,andthefrequency,gainandQofeachbandcanbeseenbelowthecolorednumberoftheband.TheseresultscanalsobefoundinthePEQmenu,wheretheycanbefurthercustomized.

D. Buttons for auto EQ1. Remove EQ –ThisbuttonwillremovetheresultsofapreviousautoEQfromthispage.Itwillalso

disablebutnotresetthevaluesofallbandsinthe“5BandPEQ”inthePEQmenu.2. Restart –ThisbuttonwillrestarttheautoEQprocess.Afteramoment,thegreenbuttonwillchange

to“StartPosition1”,nomatterhowfaralongintheprocessyouare.3. Start Position X –Pressthisbuttontostartmeasurementsateachposition.Oncethebuttonis

pressedforthefirsttime,allvaluesfromthe5BandPEQwillbereset.

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Auto EQ TroubleshootingA. Anerrormessagewillappearifthevolumeistoolow.Fixthisby–

1. MakesurethattheprovidedmicrophoneissecurelypluggedintotherearoftheAPA1200DSP,andthatthemicrophoneissecurelyattachedtotheextensioncable.

2. Checkthemicrophoneandmicrophonecablefordamage.3. Increasingthevolumeusingtheprovidedslider4. Ifyoudonothearthetestsignalafterpressing“startposition1”,re-checkyourconnectionbetween

thesubwooferandtheAPA1200DSP.MakesurethatthesubwooferisconnectedinbridgemodeandtheUIissetto“SUB”.Inrarecases,powercyclingtheAPA1200DSPbyflippingthepowerswitchoffandthenbackonafterafewsecondsmighthelp.

B. Thecorrectionisnotsatisfactoryordoesnotsoundright.1. MakesureyouareusingthemicrophonethatwasincludedwiththeAPA1200DSPanditisfreeof

obstructionordamage.2. Ifyoudonothaveyourmains(fullrangespeakers)highpassed(preventthemfromplayingtheir

ownbass),thebasscomingfromyourmainsandfromyoursubwoofercouldcombineinanunde-sirableway.TheautoEQalgorithmcannotaccountforthebassthatiscomingfromyourmains.

3. Trytakingmeasurementsatahighervolumeorlowervolume.Youmightbeoverdrivingyoursub-wooferifthevolumeistooloud,orunder-drivingthesubwoofer,whichcouldresultinmisrepresen-tativemeasurements(especiallyinalargerroom).

4. Takeyourmeasurementsatdifferentpositions.Ifyoutookyourmeasurementsclusteredtogether,trytakingthemoveralargerarea.Ifyouusedalargeareatobeginwith,trytakingmeasurementsclosertoadesiredlisteningpositioninstead.

5. MakesurethatyoudonothaveotherEQorfiltersettingsenabledthatnegativelyaffectthesoundofyoursubwoofer.AlthoughEQforsubwoofersisverypowerful,someissuescannotbecorrectedwithEQ.Youmightneedtophysicallymoveyoursubwoofer,upgradethesubwoofer,ormodifyyourroomphysicallytoachievetheresultsyouwant.

6. TrymodifyingthedelayfunctionintheGUIoftheAPA1200DSP.Thiscanhavegreatresultsinthecombinationofsoundofyourmainspeakersandyoursubwooferbyacousticallyaligningthem.

C. Althoughroomcorrectionispowerfulandcanhelptosmoothenpoorbassacousticsinaroom,itcannotfixallproblems,andcannotmakeasubwooferbetterthanitis(butitcanhelpmaximizeitspotential!)

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Power Saving PageTheAPA1200DSPoffers3modesforpowersaving,switchableonthebackofthedevice.Seebelowforfurtherdescriptionofeachmode.Thewakeupsignallevelthresholdcanalsobeadjusted.

A. Power Saving – ThisisREADONLY.Representsthestateofthe“Auto”switchonthebackofthedevice.Thereare3optionsforthistoggleswitch.

1. ON–IftheAPA1200DSPisconnectedtopowerandthepowerswitchisON,thedevicewillalwaysremainonwiththissetting.Itwillnotenterstandby.ThissettingmustbeusedifadigitalCOAXinputisyoursource.

2. Auto-Iftheamplifierdoesnotdetectananalogaudiosignalabovetheselectedwakeupsignallevelvoltageformorethan20minutes,itwillautomaticallyenterstandby.IfyouwanttowakeupinAutomode,youcaninputanaudiosignalovertheselectedwakeupsignallevelvoltageORchangetheswitchtoON.

3. 12VTrigger-Iftheamplifierdoesnotdetectananalogaudiosignalabovea1mVrmsformorethan20minutesAND doesnotdetecta12VDCsignalthroughtheinputtriggerjack,thedevicewillen-terstandby.Thedevicewillonlywakeupwhena12VDCisdetectedontheinputtriggerjack.

A. Wakeup Signal Level – Setsthethresholdvoltagerequiredtowakethedevicewhenthepowersavingmodeissetto“auto”.

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Load SelectionWheninstereomode,usethismenutotelltheAPA1200DSPifyouareusing2Ohmor4Ohmspeakers.Thishelpstoproperlymaximizethepoweroutput.Ifusingspeakersthataregreaterthan4Ohm,select4Ohm.BothoptionswillbegreyedoutwheninSUBmode,asbridgedconfigurationsonlyallow4Ohmminimum.

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Network Configuration PageDisplaysnetworkinformation.DonotdisableDHCPunlessyouarefamiliarwithnetworkingandknowwhatyouaredoing.IfanIPaddressisnotprovidedbythenetwork,thedefaultIPis192.168.14.1.Tofindyourdevice’sIPaddresswithoutusingthismenu,usetheonboardscreenanddialtonavigatetothe“deviceinformation”screen.

About PageDisplaysmodelnumberandfirmwareversion.

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SpecificationsInput Sensitivity Voltage: ..................... 0.316VRMS@-10dBVswitch

0.631VRMS@-4dBVswitchMax Input Level Voltage: ...................... 1.8VRMSFrequency Response: ............................ 20Hzto20kHzFrequency Deviation (20-20kHz): ......... 3 dBRMS Output Power, Stereo: ................. 560Wx2RMS Output Power, Bridged: ............... 1150WSNR, A-weighted: .................................. >96dBTHD+N @ Rated Power: ....................... 0.74%Auto-on Sensitivity: .............................. 10mVRMSPower Consumption: ............................ Standby:<2W

Idle:17.5WMax:1600W

Weight: .................................................. 16.2lbs.Dimensions: .......................................... 17″Wx15″Dx3.75″ H

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TroubleshootingQ: I have connected the APA1200DSP to my network using an ethernet patch cable, but I cannot connect my web browser to the device’s browser-based GUI.A: Seepage8foradedicatedtroubleshootingsectionfornetworkingissues.Makesuretofollowalldirectionsinthatsectionforsetup.

Q: I cannot go back when using the dial and on device display.A:Asingleclickofthebuttonnavigatesforwardthroughthemenus,butadoubleclickofthebuttonnavigatesbackthroughthemenus.

Q: After switching to stereo mode from sub mode (or vice versa), I am not getting the appropriate output from my APA1200DSP.A: ItisrecommendedtorestartyourAPA1200DSPaftermakingthischange,thisshouldfixyourproblemifyourwiringiscorrect.

Q: I cannot use auto EQ!A:ThedevicemustbeinSUBmodeforautoEQtowork.AutoEQdoesnotworkinstereomodebydesign.

Q: My device goes to sleep even though there is music playing.A:ChangetheAUTOswitchto“on”onthebackonthedevice.Adigitalcoaxconnectionwillnotkeepthedevicefromenteringstandby.

Q: The volume is much lower than I expect from my speakers or subwooferA:

1. Ifyouhavejustchangedthemodefrom“stereo”to“sub”orviceversa,restartyourAPA1200DSP.2. Ifyouhavewiredyourspeakersinstereobutyouaresetto“sub”mode,thespeakerswillbeplayingoutof

phasewitheachother,whichwillnotsoundrightandwillreduceyourbassoutputinmostcases.Makesureyouaresettostereomodeifconnectedinstereo,andsubmodeifconnectedinbridgemode.

Makesurethatyourhighpassandlowpassfiltersaresetappropriately.Forexample,ifyouareusingtheAPA1200DSPasasubwooferamplifier,alowpassfiltersetatalowfrequencylike25Hzcouldcutoutmostofthedesiredoutput.Ifunsure,trypressingtheresetbuttoninthepresetsmenutoremoveallDSP.

Q: The line output is not playing full range audio / I don’t have any bass from my main speakers.A: TheAPA1200DSPhas“lineout”settingsallowingforahighpassfiltertobeappliedtothelineoutput.Itwillnotbeenabledbydefault,butmakesureitisturnedoffifyouarehavingthisproblem.

Q: My device is entering standby even though there is audio input playing into the device.A:

1. ThestandbyfeaturedoesnotworkwithdigitalautothroughtheCOAXport.IfusingtheCOAXport,youmustturnstandbyoffbysettingthe‘AUTO’switchonthebackofyourdeviceto“ON”mode.

2. Ifusinganaloginputandyourdeviceisstillgoingintostandby,trytoincreasethelevelonthesourcedevice,andalsotryusingalowernumberforyour“wake-upsignallevel”settinginthepowersavingmenu.

3. Makesurethatyourinputsourceisnotsendingahigh-passedsignalintoyourAPA1200DSP.Ifyoumustuseahigh-passedinput,itisrecommendedtodisablethestandbyfunctionalityofyourdevice,becausehigh-passedsignalscanmakeauto-onfeaturesnotworkcorrectly.

Q: Do I need internet access to use the APA1200DSP’s web interface?A: Internetaccessisnotrequiredforthisdevice.Forexample,youcouldconnecttheAPA1200DSPintoarouterthatisnotconnectedtotheinternet,andthenconnecttotheWi-FibroadcastedfromtherouterwithaphoneorlaptopandstillconnecttotheAPA1200DSP’sinterfacebyenteringtheIPaddressintoyourwebbrowser.

Dayton Audio® Last Revised: 4/6/2021

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