[. . . ] · seextremecautionwhendrillingholestoavoiddamagingfuellinesorexisting U vehiclewiring. · llamplifierinstallationsrequirepower, signalandspeakerwires(notincluded). A · namplifierinstallationkit(soldseparately)ishighlyrecommendedtofacilitatethe A installation. [. . . ] D InputSignal · heamplifier'sinputsignalconnectstotheheadunit'slowlevel(RCA)orhighlevel T (speakerwire)outputs. · owlevelinputsignaldeliverthebestperformance. Ifunavailable, usethehigh L levelinputs-wheninterfacingwithfactoryheadunitforinstance. CAUTION ·Donotusebothlowandhighlevelinputsatthesametime-connectonlyoneor the other. N 3 XPASERIESINSTALLATION PowerandSpeakerConnections XPA2500 1 8 2 3 4 5 6 7 XPA4640 1 7 2 3 4 5 6 7 1 2 3 4 LEDIndicator BassBoost CrossoverModeSwitch CrossoverFrequency 5 6 7 8 InputLevelControl HighLevelInputs LowLevelInputs InputModeSwitch 4 XPASERIESINSTALLATION AudioInputsandControls 1 2 3 4 5 XPA2500 1 5 4 3 2 XPA4640 1 2 3 SpeakerConnection(s) Ground Connection RemoteConnection 4 5 +12VDCBatteryConnection Fuse(s) 5 XPASERIESINSTALLATION TypicalWireRouting MainPowerConnections Connect+12V, GNDandREMwiresaccordingly. AsuitablefuseMUSTbeinstalledonthe +12Vleadwithin18"ofthebatteryforprotectionofthevehicle'selectricalsystem. FuseRating Whenreplacingfuses, makesurenewfuse is the correct type and amperage. Using an incorrect fuse could damage the amplifier. Power/GroundWireSize Foroptimumperformance, useonlythewire sizelistedbeloworlarger. Makesuretouse thesamesizepowerandgroundwire. XPA250025ampATOx1 XPA464025ampATOx2 XPA250010gauge XPA46408gauge 6 XPASERIESINSTALLATION AmplifierConnections SpeakerConnections Connectspeakerwiresobserving polarity. Theminimumimpedance load for the XPA2500 and XPA4640 is 2 ohms stereo and 4 ohms bridged. Useofloadslowerthan these is not recommended and may cause amplifier damage. TheXPA2500andXPA4640can bewiredforstereo, bridgedor stereo/bridgedsimultaneous operation. 2Speakers(stereo) Subwoofer(mono) TypicalStereoWiring (2ohmsminimum) TypicalBridgedWiring (4ohmsminimum) XPA2500speakerconnectionsshown InputSignalConnections LowLevelInput(RCA) Lowlevel(RCA)inputsignalispreferredforbestperformance. Typicaltrunk-mount amplifierinstallationsrequirea17-20footRCAcable. Mosttrucksandunder-seat applicationsrequirea6-9footRCAcable. UsingtwistedpairconstructionRCAcableswill minimize noise. HighLevelInput(SpeakerWire) Highlevelinputsshouldonly beusedwhenRCAoutputsare notavailablefromtheheadunit. Connecttheheadunitspeaker outputstothehighlevelinput connectorasshownbelow. The blackwire(signalreferenceground) mayormaynotrequireaconnection tochassisground-dependingon your particular installation. CAUTION Donotusebothlowandhighlevelinputsatthesametime-connectonlyoneortheother. 7 XPASERIESOPERATION Configuration/Setup InputlevelControl Theinputlevelcontrol(gain)isusedtoobtainthebest possiblematchbetweentheheadunitaudiooutputand theamplifierinput. Beginbyturningtheinputlevelcontrol fullycounterclockwise. Next, turnuptheheadunitvolume controlaround3/4ofthewayup. Adjusttheinputlevel controlclockwiseuntilaudibledistortionisheard, then slightlycounterclockwisetoprovidethebestmatch. Select2CHmodeiftheheadunitonlyhas1pairofRCA outputs. PlugtheRCA'sfromtheheadunitintochannels 1/2or3/4. All4amplifierinputswillreceiveasignal. Select4CHmodeiftheheadunithas2pairsofRCA outputs. PlugtheRCA'sfromtheheadunitintochannels 1/2and3/4. CrossoverMode (XPA2500&XPA4640) Thecrossoverisusedtofilteroutfrequenciesaboveor belowacertainpoint. ChooseLPFwhenusingtheamplifier withsubwoofers, HPFwhenusingwithmidrange/tweeter combinations and FULLwhenusingwithcoaxial-type speakers. [. . . ] 1. Beforeyoucallforservice, checkthe troubleshootingguideinyourowner's manual. Aslightadjustmentofanycustom controlsmaysaveyouaservicecall. 2. Ifyourequireserviceduringthewarranty period, youmustcarefullypacktheproduct (preferablyintheoriginalpackage)andship itbyprepaidtransportationwithacopyofthe original receipt from the retailer to an authorizedservicecenter. 3. Pleasedescribeyourprobleminwritingand includeyourname, areturnUPSshipping address(P. O. Boxnotacceptable), anda daytimephonenumberwithyourshipment. [. . . ]