Emotiva UPA-5 Manual

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PoorBassPerformancefromFullRangeSpeakers

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• Makesurethatyourpreampdoesnothavethebass(tonecontrol)levelturneddown.

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• Manysurroundpreamplifiershavecontrols,whichcandirectallthebasstosubwoofers,orletyourmainspeakers

playthefullrange.Makesurethatthepreamplifierhasbeencorrectlyset.Ifyouarenotusingasubwoofer,setthe

speakeroptionsto“Large”wherepossible.

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• Checkthatthespeakerwireshavebeenconnectedcorrectly:Makesurethatthepositiveofeachspeakerconnects

toapositiveoutputoftheamplifier,andthenegativeofeachspeakerconnectstothenegativeoutput.Ifone

speakeriswiredincorrectly,thenitwillbe“outofphase”withtheothers,resultinginpoorbassperformance.

DOUBLECHECKALLTHESPEAKERCONNECTIONS!!

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Turn‐onandTurn‐offThumps

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• Plugtheampliﬁerintoanun‐switchedACoutlet,andusethe3.5mmTriggerInputconnectionwithatrigger

between5‐12VDCfromthesourceunitorpreampliﬁer.Thisshouldallowtheampliﬁertoturnonandoff silently.

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• Ifyourpoweredsubwooferisthecauseofthe“thump”sound(nottheotherspeakersconnectedtotheamplifier),

plugitintoadifferent115VACoutletthantheampliﬁersothereisnopowersurgeconﬂict.

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• Installaline‐conditioningdevice.

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“Hum”NoisesintheSpeakers

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• Thisproblemismorethanlikelycausedbya“groundloop”inyoursystem,ratherthanafaultintheamplifier.

Followthesestepstoisolatethemaincauseofthehum;theremayevenbemorethanone.Remembertoturnoff

allcomponentsinyoursystem,includingtheampliﬁer,beforedisconnectingorconnectinganycablesduring

troubleshooting.

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• Trytohaveallofyourequipmentonthesameelectricaloutletorcircuit.Groupallthelowpowercomponents

(preamp,CDplayer,DVDetc.)onasingleoutletorpowerstrip.Thisisprovidedthattheoverallcurrentdrawfrom

yourequipmentdoesnotexceedtheratingoftheoutletorbreaker.

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• Disconnectallcables,whichcomefromoutsidetheroom,andcheckifthehumgoesaway.Thisincludessuch

connectionsascableTV,satelliteTV,orrooftopantennas.Makesurethattheyaredisconnectedwheretheyﬁrst

entertheroom,sotheyaremakingnoconnectiontothepreamplifierortheTV,oranyothercomponent.Ifthehum

iscausedbythecableTVline,thenyouwillneeda“groundloopisolator.”Thisisaninexpensivedeviceﬁttedinline

withthecoaxialcablefeed.ContactyourCableCompanyorEmotivaforassistance.

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• DisconnectallconnectionsfromthepreampliﬁertoyourTV,VCRorDVD.

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• Asatest,disconnectanyothercomponent,whichhasagroundedpowercord.

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NOTE:Neverremovethegroundpinfromanypowercords(ifpresent).Thisisverydangerous.

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Ifthehumpersists,disconnectallthesourcecomponentsoneatatimefromthebackofthepreampliﬁer,untilyouidentify

theproblem.

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• Trymovingthespeakercablesawayfromanypowercords.Tryjustonespeaker,connectingittoeachampliﬁer

channelandseeifonechannelisbad.

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Checkthattheinterconnectcablestotheampliﬁerdonothaveanybrokenconnections.Thebestwaytodothisisto

substituteaknowngoodconnectionforthesuspectconnection.Ifyoureversethecablesandtheproblemgoesaway,the

cablemaybedamagedorbroken.Thisispossibleevenifyoucan’tphysicallyseethebreakasthestrainforpullingonaudio

cablescansometimesbreakthewireinternally.