Mackie HD 1801 Car Speaker User Manual


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Placement
Asmentionedintheprevioustwopages,HD1801
subwoofersmaybeown.However,theyaredesignedto
sitontheoororstage,aswell.Asocketis
providedontopoftheHD1801formountingother
Mackieloudspeakers.Useasuitablespeakermounting
poletomountthemontheHD1801.Seethehookup
diagramsstartingonpage4.
Checktomakesurethatthesupportsurface(e.g.,
oor,etc.)hasthenecessarymechanicalcharacteris-
ticstosupporttheweightoftheloudspeaker(s)and
subwoofer(s).
Whenpole-mountingloudspeakers,besurethatthe
HD1801subwoofersarestabilizedandsecuredfrom
fallingoverorbeingaccidentallypushedover.For
stackedscenarios,itishighlysuggestedthatstrapsare
utilized.Failuretofollowtheseprecautionsmayresult
indamagetotheequipment,personalinjury,ordeath.
Aswithanypoweredcomponents,protectthemfrom
moisture.Avoidinstallingthesubwooferinplaces
exposedtoharshweatherconditions.Ifyouaresetting
themupoutdoors,makesuretheyareundercoverifyou
expectrain.
Thermal Considerations
TheHD1801hasapowerfulbuilt-inampliercapable
ofproducing800wattsofrmspower.Asanamplier
works,itproducesheat.Thehigherthesignallevel,the
louderandhotteritgets.Itisimportanttodissipatethe
heatasquicklyaspossible.Thisresultsinincreased
reliabilityandlongevityfortheamplier.
Theampliermoduleiscooledbytwin
thermally-controlledvari-speedfans.Inorderforthis
coolingsystemtoworkefciently,itisimportantto
provideadequateairspacebehindthesubwoofer.When
positioningtheHD1801,werecommendleavingatleast
sixinchesofairspacebehindit.
Intheunlikelyeventoftheamplieroverheating,a
built-inthermalswitchwillactivate,mutingthe
amplier’soutput.Whentheamplierhascooleddown
toasafeoperatingtemperature,thethermalswitch
resetsitself,andtheHD1801resumesnormaloperation.
Ifthethermalswitchactivatesfrequently,tryturning
downthelevelcontrolanotchortwoonthemixing
console(orthebackoftheHD1801)toavoid
overheatingtheamplier.Beawarethatdirectsunlight
and/orhotstagelightsmaybethecauseofanamplier
overheating.
AC Power
BesuretheHD1801ispluggedintoanoutletthat
isabletosupplythecorrectvoltagespeciedforyour
model.Itwillcontinuetooperateatlowervoltages,but
willnotreachfullpower.
Besuretheelectricalservicecansupplyenough
amperageforallthecomponentsconnectedtoit.
Werecommendthatastiff(robust)supplyofAC
powerbeusedbecausetheamplierplaceshigh
currentdemandsontheACline.Themorepowerthatis
availableontheline,thelouderthesubwooferwillplay
andthemorepeakoutputpowerwillbeavailablefora
cleaner,punchierbass.Asuspectedproblemof“poor
bassperformance”isoftencausedbyaweakACsupply
totheamplier.
Neverremovethegroundpinonthepower
cordoranyothercomponentoftheHD1801.
Thisisverydangerous.
Care and Maintenance
YourMackiesubwooferswillprovidemanyyearsof
reliableserviceifyoufollowtheseguidelines:
• Avoidexposingthesubwooferstomoisture.If
theyaresetupoutdoors,besuretheyareunder
coverifrainisexpected.
• Avoidexposuretoextremecold(below
freezingtemperatures).Ifyoumustoperatethe
subwoofersinacoldenvironment,warmupthe
voicecoilsslowlybysendingalow-levelsignal
throughthemforabout15minutespriorto
high-poweroperation.
• Useadryclothtocleanthecabinets.Onlydo
thiswhenthepoweristurnedoff.Avoidgetting
moistureintoanyoftheopeningsofthecabi-
net,particularlywherethedriverislocated.
14
HD1801
HD1801
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