Dual DA604D Stereo Amplifier User Manual


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Theinputlevelcontrol(gain)isusedtoobtainthe
bestpossiblematchbetweentheheadunitaudio
outputandtheamplifierinput.Beginbyturning
theinputlevelcontrolfullycounterclockwise.Next,
turnuptheheadunitvolumecontrolaround3/4of
thewayup.Adjusttheinputlevelcontrolclockwise
until audible distortion is heard, then slightly
counterclockwisetoprovidethebestmatch.
Repeatforallinputlevelcontrols.
Thecrossoverisusedtofilteroutfrequencies
aboveorbelowacertainpoint.ChooseLPFwhen
usingtheamplifierwithsubwoofers,HPFwhen
usingwithmidrange/tweetercombinationsand
FLATwhenusingwithcoaxial-typespeakers.
Note: Choose FLATwhenusingtheamplifierin
stereo/bridgedsimultaneousmode.Inthismode,
passivecrossoversarerequired.Failuretouse
thecorrectpassivecomponentsmaydamagethe
amplifierand/orspeakers.Consultaqualified
professional for recommendations.
Thiscontrolallowspreciseadjustmentofthe
crossoverfrequency.
Thiscontrolprovidesadditionalboost@45Hz
whenusedwithsubwoofers.Adjustthiscontrol
withcaution-asimproperusecandamage
speakers!
Settingthiscontroltothedesiredfrequencywill
limitharmfulfrequenciesbelowthesettingfrom
goingtothesubwoofer(s),preventingpossible
damagefromfrequenciesthatsubwoofersarenot
designed to handle.
ThegreenLEDindicatorilluminatesduringnormal
operation(POWER)andtheredLEDindicator
isvisiblewhentheamplifierdetectsafault
(PROTECT).
Input level Control
Crossover Mode
Crossover Frequency
Control
Bass Boost
Subsonic Filter
(DA501D and
DA801D)
LED Indicators
INSTALLATION
Configuration/Setup
8
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