Mackie HD 1801 Car Speaker User Manual


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Poor bass performance
• Checkthepolarityoftheconnectionsbetween
themixerandthesubwoofers.Youmayhave
yourpositiveandnegativeconnectionsreversed
atoneendofonecable,causingonesubwoofer
tobeout-of-phase.
• Checkyoursubwooferpolarityswitchesare
conguredappropriatelyforyoursetup.See
page10formoreinformation.
Poor sound
• Isitloudanddistorted?Makesurethatyou’re
notoverdrivingastageinthesignalchain.
Verifythatalllevelcontrolsaresetproperly.
• Istheinputconnectorpluggedcompletelyinto
thejack?Besureallconnectionsaresecure.
Noise
• Makesureallconnectionstothepowered
subwoofersaregoodandsound.
• Makesurenoneofthesignalcablesarerouted
nearACcables,powertransformers,orother
EMI-inducingdevices.
• IstherealightdimmerorotherSCR-based
deviceonthesameACcircuitastheHD1801?
UseanAClinelterorplugtheHD1801intoa
differentACcircuit.
Hum
• Trydisconnectingthecableconnectedtothe
maininputjack.Ifthenoisedisappears,it
couldbea“groundloop,”ratherthanaproblem
withtheHD1801.Trysomeofthefollowing
troubleshootingideas:
•Usebalancedconnectionsthroughoutyour
systemforthebestnoiserejection.
•Wheneverpossible,plugalltheaudio
equipment’slinecordsintooutletswhich
shareacommonground.Thedistance
betweentheoutletsandthecommon
groundshouldbeasshortaspossible.
IfyouthinkyourMackieproducthasaproblem,
pleasecheckoutthefollowingtroubleshootingtipsand
doyourbesttoconrmtheproblem.VisittheSupport
sectionofourwebsite(www.mackie.com/support)
whereyouwillndlotsofusefulinformationsuchas
FAQsandotherdocumentation.Youmayndtheanswer
totheproblemwithouthavingtosendyourMackie
productaway.
Troubleshooting
No power
• Isitpluggedin?MakesuretheACoutletislive
(checkwithatesterorlamp).
• Ournextfavoritequestion:Isthepowerswitch
on?Ifnot,tryturningiton.
• IsthepowerLEDontherearpanelglowing
green?Ifnot,makesuretheACoutletislive.If
so,referto“Nosound”below.
• TheinternalAClinefusemaybeblown.Thisis
notauserserviceablepart.Ifyoususpectthe
AClinefuseisblown,pleaseseethe"Repair"
sectionnext.
No sound
• Istheinputlevelcontrolfortheinputsource
turnedallthewaydown?Verifythatallthe
volumecontrolsinthesystemareproperly
adjusted.
• Isthesignalsourceworking?Makesurethe
connectingcablesareingoodrepairand
securelyconnectedatbothends.Makesurethe
outputvolume(gain)controlonthemixing
consoleisturnedupsufcientlytodrivethe
inputsofthespeaker.
• MakesurethemixerdoesnothaveaMuteon
oraProcessorloopengaged.Ifyound
somethinglikethis,makesurethevolume/
gainisturneddownbeforedisengagingthe
offendingswitch.
• Isthethermalindicatorlitredontherear
panel?Makesurethereisatleastsixinchesof
freespacebehindtheHD1801.
Appendix A:
Service Information
15
Owner’s Manual
Owner’s Manual
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