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JBL GX-A602 Car Amplifier User Manual

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25

PROBLEM CAUSES AND SOLUTIONS

Sound only comes from some of the speakers

connected to the amplifier

•Checkthatthevehicleaudiosystem’ssourceunit’sbalanceandfadercontrolsaresettotheir

center (midpoint) positions.

•(GX-A604):Checkthatthesettingoftheamplifier’sModeSwitchmatchestheinputandspeaker

connections made to the amplifier

Sound is too quiet, even with the vehicle audio

system’s source unit volume all the way up

•Checkthattheamplifier’sLevelcontrolsarenotturnedtoolow.SeeSet The Input Level, on

page 22, for information about setting the Level controls.

Sound in the front/rear speakers is distorted •Makesuretheamplifier’sCrossoverFilterswitchforthedistortedchannelsissettoHP.

•SettheCrossovercontrolforthedistortedchannelstoahighersetting.

•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.

Sound in the subwoofer is distorted •(GX-A604,GX-A602):SettheBassBoostswitchto"OFF".

•(GX-A3001):Whilelisteningtobass-heavymusic,turntheBassBoostcontrolallthewaydown,

and then gradually increase it until the distortion begins to return. Reduce the Bass Boost

control setting slightly to eliminate the distortion and leave it set there.

•Checkthatthedistortionisnotoriginatingfromthevehicleaudiosystem’ssourceunit.

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