Dual DPA250 Mode d'emploi
INSTALLATION/OWNER’S MANUAL
Mobile Power Amplifier
DPA250
2
DPA250 INSTALLATION
Preparation
Please read entire manual before installation. Due to the technical nature of amplifiers,
it is highly recommended that your DUAL amplifier is installed by a professional installer
or an authorized dealer.
Before You Start
•Disconnectnegativebatteryterminal.(consultaqualifiedtechnicianforinstructions)
•Avoidinstallingtheamplifierwhereitwouldbesubjecttohightemperatures,suchas
fromdirectsunlight,orwhereitwouldbesubjecttodust,dirtorexcessivevibration.
•Useextremecautionwhendrillingholestoavoiddamagingfuellinesorexisting
vehiclewiring.
•Allamplifierinstallationsrequirepower,signalandspeakerwires(notincluded).
•Anamplifierinstallationkit(soldseparately)ishighlyrecommendedtofacilitatethe
installation. Consult your dealer for recommendations.
Mounting Location
•Chooseamountinglocationfortheamplifier.Suggestedlocationsincludeunderaseat
orinthetrunk.
•Theamplifiercanbemountedhorizontal(recommended)orvertical.Foroptimum
performance,makesuretoprovideatleast1"ofspacetoaroundallsides.Donot
mounttheamplifierundercarpetsorwhereairflowisrestricted.
•Donotinstalltheamplifierwhereitmaybeexposedtomoisture.
•Theoptimummountinglocationvariesbetweenvehicles.Remembertotestall
amplifier functions before completing the final mounting procedure.
TYPICAL MOUNTING METHOD
NOTE
Be sure to follow specific instructions included with your amplifier installation kit
(not included with this amplifier). The information below should be used a general
guideline only.
Power Wire (+12V)
•Disconnectnegativebatteryterminalbeforeproceeding.Consultaqualified
technician for instructions if you are unsure.
•Planwireroutingbeforecuttinganywirestolength.Beginbyroutingthepower
+12Vwirefromthebatterytotheamplifierlocation.Useagrommetwhenrunning
wiresthroughthefirewallormetalopenings.Avoidrunningthepowerwirenear
existingvehiclewiringtopreventinducednoisefromenteringtheaudiosystem.
•Useextremecautionwhendrillingholestoavoiddamagingfuellinesorexisting
vehiclewiring.
•The+12VwireMUSTbefusedwithin18"ofthebatteryforprotectionofthevehicle’s
electrical system.
Ground Wire (GND)
•Theamplifiergroundwireshouldbeasshortaspossible.Chooseacleanunpainted
sectionofmetalorthevehiclechassiswhenattachingthegroundconnection.Be
sure to clean the area of any dirt or grease.
Remote Turn-on Wire (REM)
•Theremoteturn-onwireconnectstotheheadunit'samplifierturn-onleadorpower
antenna output.
Speaker Wires
•Chooseadequategaugespeakerwiredependingonyourexactamplifier/speaker
combination.Besuretoobservepolaritywhenconnecting.
•Donotgroundanyspeakerwiresorconnectanyspeakerwirestogether.
Input Signal
•Theamplifier'sinputsignalconnectstotheheadunit'slowlevel(RCA)outputs.
CAUTION
•Neverrunanywiresunderneathoroutsidethevehicle.
3
DPA250 INSTALLATION
Connection Descriptions
4
DPA250 INSTALLATION
Connections and Control Locations
RCALineInputs
Gain Control
CrossoverFrequencyControl
CrossoverMode
BassBoost
TrebleBoost
Power/ProtectLEDs
Ground Connection
RemoteConnection
+12VDCBatteryConnection
Fuse
SpeakerConnections
1 8
2 9
3 10
4 11
5 12
6
7
2 3 4 5 6 71
8 9 10 11 12
5
DPA250 INSTALLATION
Fuse Rating
Whenreplacingthefuse,makesurenew
fuse is the correct type and amperage. Using
an incorrect fuse could damage the amplifier.
DPA250 15ampATOx1
Power/Ground Wire Size
Foroptimumperformance,useonlythewire
sizelistedbeloworlarger.Makesuretouse
thesamesizepowerandgroundwire.
DPA25010awg
Main Power Connections
Connect+12V,GNDandREMwiresaccordingly.AsuitablefuseMUSTbeinstalledonthe
+12Vleadwithin18"ofthebatteryforprotectionofthevehicle’selectricalsystem.
Typical Wire Routing
6
DPA250 INSTALLATION
Amplifier Connections
Speaker Connections
Connectspeakerwiresobserving
polarity.Theminimumimpedance
load is 2 ohms stereo and 4 ohms
bridged.Useofloadslowerthan
these is not recommended and
may cause amplifier damage.
TheDPA250canbewiredfor
stereo,bridgedorstereo/bridged
simultaneous operation.
Input Signal Connections
Low Level Input (RCA)
Lowlevel(RCA)inputsignalispreferredforbestperformance.Ifyourheadunitdoesnot
includelowlevel(RCA)outputs,anoptionalhigh-to-lowadaptermayberequired(sold
separately).Typicaltrunk-mountamplifierinstallationsrequirea17-20footRCAcable.
Mosttrucksandunder-seatapplicationsrequirea6-9footRCAcable.Usingtwistedpair
constructionRCAcableswillminimizenoise.
Subwoofer (mono)
Typical Bridged Wiring
(4 ohms minimum)
2 Speakers (stereo)
Typical Stereo Wiring
(2 ohms minimum)
7
DPA250 INSTALLATION
Configuration/Setup
Theinputlevelcontrol(gain)isusedtoobtainthebest
possiblematchbetweentheheadunitaudiooutputand
theamplifierinput.Beginbyturningtheinputlevelcontrol
fullycounterclockwise.Next,turnuptheheadunitvolume
controlaround3/4ofthewayup.Adjusttheinputlevel
controlclockwiseuntilaudibledistortionisheard,then
slightlycounterclockwisetoprovidethebestmatch.
Repeatforallinputlevelcontrols.
Thecrossoverisusedtofilteroutfrequenciesaboveor
belowacertainpoint.ChooseLPFwhenusingtheamplifier
withsubwoofers,orFULLwhenusingwithcoaxial-type
speakers.
Note: Choose FULLwhenusingtheamplifierinstereo/
bridgedsimultaneousmode.Inthismode,passive
crossoversarerequired.Failuretousethecorrectpassive
componentsmaydamagetheamplifierand/orspeakers.
Consultaqualifiedprofessionalforrecommendations.
Thiscontrolallowspreciseadjustmentofthecrossover
frequencyfrom50Hz~300Hz.
Thiscontrolprovidesadditionalboost@45Hzwhenused
withsubwoofers.Adjustthiscontrolwithcaution-as
improperusecandamagespeakers!
Thiscontrolprovidesadditionalboost@5kHzwhenused
withsubwoofers.Adjustthiscontrolwithcaution-as
improperusecandamagespeakers!
ThePOWERLEDindicatorilluminatesgreenduringnormal
operation.
ThePROTECTLEDindicatorilluminatesredwhenthe
amplifier detects a fault.
Input level Control
Crossover Mode
Crossover Frequency
Control
Bass Boost
Treble Boost
LED Indicators
8
DPA250 WARRANTY
Limited One-Year Warranty
Thiswarrantygivesyouspecificlegal
rights.Youmayalsohaveotherrights
whichvaryfromstatetostate.
DualElectronicsCorp.warrantsthis
product to the original purchaser to be free
fromdefectsinmaterialandworkmanship
for a period of one year from the date of
the original purchase.
DualElectronicsCorp.agrees,atour
option,duringthewarrantyperiod,
to repair any defect in material or
workmanshiportofurnishanequal
new,renewedorcomparableproduct
(whicheverisdeemednecessary)in
exchangewithoutcharges,subjectto
verificationofthedefectormalfunctionand
proofofthedateofpurchase.Subsequent
replacementproductsarewarrantedfor
thebalanceoftheoriginalwarrantyperiod.
Who is covered?Thiswarrantyisextended
to the original retail purchaser for products
purchased from an authorized Dual dealer
andusedintheU.S.A.
What is covered?Thiswarrantycoversall
defectsinmaterialandworkmanshipin
thisproduct.Thefollowingarenotcovered:
software,installation/removalcosts,
damage resulting from accident, misuse,
abuse, neglect, product modification,
improper installation, incorrect line
voltage,unauthorizedrepairorfailure
tofollowinstructionssuppliedwiththe
product, or damage occurring during
returnshipmentoftheproduct.Specific
license conditions and copyright notices for
thesoftwarecanbefoundviawww.dualav.
com.
What to do?
1.Beforeyoucallforservice,checkthe
troubleshootingguideinyourowner’s
manual.Aslightadjustmentofany
customcontrolsmaysaveyouaservice
call.
2.Ifyourequireserviceduringthe
warrantyperiod,youmustcarefully
packtheproduct(preferablyinthe
originalpackage)andshipitbyprepaid
transportationwithacopyoftheoriginal
receipt from the retailer to an
authorizedservicecenter.
3. Please describe your problem in
writingandincludeyourname,a
returnUPSshippingaddress(P.O.Box
notacceptable),andadaytimephone
numberwithyourshipment.
4.Formoreinformationandforthe
location of the nearest authorized
servicecenterpleasecontactusbyone
ofthefollowingmethods:
•Callustoll-freeat1-866-382-5476
•E-mailusat[email protected]
ExclusionofCertainDamages:This
warrantyisexclusiveandinlieuofany
andallotherwarranties,expressedor
implied,includingwithoutlimitationthe
impliedwarrantiesofmerchantabilityand
fitness for a particular purpose and any
obligation, liability, right, claim or remedy
incontractortort,whetherornotarising
from the company’s negligence, actual
orimputed.Nopersonorrepresentative
is authorized to assume for the company
anyotherliabilityinconnectionwiththe
saleofthisproduct.Innoeventshallthe
company be liable for indirect, incidental or
consequentialdamages.
9
DPA250 OPERATION
Specifications
CEA-2006PowerStandardSpecifications
(reference: 14.4VDC, 20Hz~20kHz)
PowerOutput(14.4VDC,20Hz~20kHz):
35 Watts RMS x 2 channels @ 4 ohms and ≤ 1% THD+N
50 Watts RMS x 2 channels @ 2 ohms and ≤ 1% THD+N
100 Watts RMS x 1 channel @ 4 ohms (bridged) and ≤ 1% THD+N
Total dynamic power: 250 Watts @ 4 ohms
Signal to noise ratio: 75dBA (reference: 1 watt into 4 ohms)
Frequency response: 20Hz ~ 20kHz (+/-3dB)
Amplifier dimensions: 8.27”(L) x 7.09”(W) x 1.97”(D)
Typical installation dimensions: 10”(L) x 10”(W) x 3”(D)
Designandspecificationssubjecttochangewithoutnotice.
10
DPA250 OPERATION
Troubleshooting
Problem Cause Action
Unit will not turn on
(no power LED indicator)
+12Vwirenotconnectedorincorrectvoltage
REMwirenotconnectedorincorrectvoltage
Checkconnectionsforpropervoltage
(11~16VDC)
GNDwirenotconnected Checkconnectiontoground
Fuse(s)blown Replacefuse(s)
Unit has power - power
LED is green
(but no sound)
Speakerwiresnotconnected Checkconnectionsatspeakers
Volumeturnedallthewaydown Increasevolumelevelatheadunit
Oneormorespeakerwirestouchingeach
other or touching chassis ground
Insulateallbarespeakerwiresfromeach
other and chassis ground
Speaker(s)defectiveordamaged Check/replacespeaker(s)
Inputsignalnotconnected Checklowlevelinputsforproper
connection
Unit blows fuse(s) Incorrectfuserating Usefuse(s)withcorrectrating
+12Vwiretouchingchassisground Checkforpinchedwire
Speaker(s)defectiveordamaged Check/replacespeaker(s)
Engine noise Badgroundconnection Makesureamplifiergroundwireis
connected to clean bare metal
SignalgroundlooporRFI(radiofrequency
interference)
Re-routeRCAcablesfromexistinghigh
currentwiring
Protect LED illuminates
red
(protect mode)
Oneormorespeakerwirestouchingeach
other or touching chassis ground
Insulateallbarespeakerwiresfromeach
other and chassis ground
Speaker(s)defectiveor
damagedinternally(shorted)
Check/replacespeaker(s)
Speakerloadlessthan2ohms(stereo)
Speakerloadlessthan4ohms(bridged)
Adjustspeakerload-amplifierwillnot
operateatlessthan4ohmswhenbridged
Distorted audio output Incorrectinputsignaltypeor
inputleveltoohigh
Checkconnectionsandreduce/adjustinput
level
Low audio output Incorrectinputsignaltypeor
inputleveltoolow
Checkconnectionsandincrease/adjust
inputlevel
Weak bass Speaker(s)arewiredoutofphase Check(+)and(-)speakerconnections
(Observecorrectpolarity)
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1
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