Dual DA304 Stereo Amplifier User Manual


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Problem Cause Action
Unit will not turn on
(no power LED
indicator)
+12Vwirenotconnectedorincorrect
voltage.REMwirenotconnectedor
incorrectvoltage
Checkconnectionsforpropervoltage
(11~16VDC)
GNDwirenotconnected Checkconnectiontoground
Fuse(s)blown Replacefuse(s)
Unit has power -
LED is green (but
no sound)
Speakerwiresnotconnected Checkconnectionsatspeakers
Volumeturnedallthewaydown Increasevolumelevelatheadunit
Oneormorespeakerwirestouching
each other or touching chassis
ground
Insulateallbarespeakerwiresfrom
each other and chassis ground
Speaker(s)defectiveordamaged Check/replacespeaker(s)
Inputsignalnotconnected
Checkhighorlowlevelinputsfor
proper connection
Unit blows fuse(s)
Incorrectfuserating Usefuse(s)withcorrectrating
+12Vwiretouchingchassisground Checkforpinchedwire
Speaker(s)defectiveordamaged Check/replacespeaker(s)
Engine noise
Badgroundconnection
Makesureamplifierisgroundedto
clean bare metal
SignalgroundlooporRFI(radio
frequencyinterference)
Re-routeRCAcablesfromexisting
highcurrentwiring
LED illuminates red
(protect mode)
Oneormorespeakerwirestouching
each other or touching chassis
ground
Insulateallbarespeakerwiresfrom
each other and chassis ground
Speaker(s)defectiveor
damagedinternally(shorted)
Check/replacespeaker(s)
Speakerloadlessthan2ohms
(stereo).Speakerloadlessthan4
ohms(bridged)
Adjustspeakerload-amplifierwill
not operate at less than 4 ohms
whenbridged
Distorted audio
output
Incorrectinputsignaltypeor
inputleveltoohigh
Checkconnectionsandreduce/
adjustinputlevel
Low audio output
Incorrectinputsignaltypeor
inputleveltoolow
Checkconnectionsandincrease/
adjustinputlevel
Weak bass
Speaker(s)arewiredoutofphase
Check(+)and(-)speaker
connections
(Observecorrectpolarity)
INSTALLATION
Troubleshooting
13
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