Dayton MCA3545 Doll User Manual


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Thank you for purchasing the MCA3545 Bi-Amplifier. It was designed and built to provide years of high quality sound reproduction
when used in active 2-way loudspeakers for music playback, computer sound systems, and home theater applications. The ampli-
fier includes features like user selectable high pass and low pass filters, independent high and low frequency level controls, rugged
independent LM3886TF output devices, and comprehensive internal protection against shorted speaker loads, thermal faults, and
overload conditions.
• 24dB/octavehighpassandlowpasslters
• Balancedandunbalancedlinelevelinput
• Thermal,overloadandfuseprotectioncircuitry
• AutoOn/Offstand-bycircuit
• Operateson115Vof230V
Features:
• Userselectablehighandlowfrequencycrossoverpoints
• IndependentLM3886TFoutputdevices
• Masterlevelcontrol
• Independenthighandlowlevelcontrols
• Switchable3dBlowfrequencyboost
Front Panel Controls/Connections
1. Power Status LED
ThepowerLEDilluminateswhenthepowerswitchisintheON
position.After20minutesofnosignaltheunitwillgointostand-
bymodeandtheLEDwilldim.
2. Power Switch (Off/Auto On)
TheamplierismanuallyturnedONorOFFviathisswitch.When
instand-bymode,(nosignalpresent)thecurrentdrawandheat
generatedisverylow,thereforeitcanbeleftintheONposition
indenitely.Theunitwillgointostand-bymodeifnosignalis
presentfor20minutes.
3. Voltage Selector Switch
Thisswitchallowstheusertoselect115Vor230Voperation.The
unitissetatthefactoryfor115Voperation.Whenoperatingat230V
besuretochangethefusetoaslowblow1A,250Vtypefuse.
4. IEC Power Jack
ThisunitfeaturesagroundedIECtypepowerjack.Thisallows
theusertochangethepowercorddependingonthecountryand
voltageused.TheIECjackalsohousesthefuseholderwhich
uses5mmx20mm,slowblow250Vtypefuse.Theunitissetat
thefactoryfor115VoperationandissuppliedwithaUSAtype
powercordanda2Aslowblow250Vfuse.
5. Level Control
Thisisthe“master”levelcontrolthatadjuststheoveralloutputlevel
(bothhighandlowlevelsimultaneously)oftheamplier.
6. Woofer Control
Independentlyadjustslowfrequencyoutputlevel,tothewoofer
only.Adjustmentrangeis0~+5dB.
7. Tweeter Control
Independentlyadjustshighfrequencyoutputlevel,tothetweeter
only.Adjustmentrangeis0~+3dB.
NOTE:Independentwooferandtweeteradjustmentsallowprecise
speakercomponentbalancing,compensatingfordifferentlevels
inprogrammaterialandvaryingroomacoustics.
8. RCA Input
RCAconnectionacceptsstandard1Vp-plinelevelsignal.This
istheunbalancedlinelevelinputforconnectiontostandard
consumergradeequipmentandaudioequipmentcommonlyused
inhomeapplications
9. XLR Input
Thisisthebalancedlinelevelinputforconnectiontomixing
consolesandotherprofessionaltypeaudioequipmentcommonly
usedinstudioapplications
Output Connections
Speaker Outputs
Therearetwosetsofspeakeroutputslocatedontherear(PC
boardside)oftheampliermodule.Eachcolorcodedred(+)
andblack(-).Theblackornegativewirefeaturesa.110"push
onconnectorandtheredorpositivewireusesa.187"pushon
connector.Outputconnectionslistedbelowassumeyouarefacing
therearoftheampliermodule(PCboardside),withthepower
transformerlocatedtotheleft.Loadsoneachoutputleadmust
haveanominalimpedanceof8ohmorhigher.
Tweeter
Thisoutputconnectionislocatedonthefarrightsideofthemain
amplierPCboard.Notetheredandblackleadsareconnected
tocorrespondingtabsonthePCboardlabeledT+andT-.
Woofer
Thisoutputconnectionislocatedtowardsthemiddleleftsideof
themainamplierPCboard,approximately2-1/2"fromtheleft
edgeoftheboard.Notetheredandblackleadsareconnectedto
correspondingtabsonthePCboardlabeledW+andW-.
(2)
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