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7
TROUBLESHOOTING
If your amplifi er does not appear to be working, check the obvious things fi rst such as blown fuses, poor or
incorrect wiring connections, incorrect setting of crossover switch and gain controls, etc. There is a Protection
(PRT) LED on the side panel of your KICKER KX series amplifi er. Depending on the state of the amplifi er and the
vehicle’s charging system, the LED will either glow red or be off.
Red (PRT) LED fl ickering with loud music? The red (PRT) LED indicates low battery voltage or an illegal
load. Check all the connections in your vehicle’s charging system. It may be necessary to replace or charge your
vehicle’s battery or replace your vehicle’s alternator.
Red (PRT) LED on, no output?
Amplifi er is very hot = thermal protection is engaged. Test for proper
impedance at the speaker terminals with a VOM meter (see the diagrams in this manual for minimum
recommended impedance and multiple speaker wiring suggestions). Also check for adequate airfl ow around
the amplifi er.
Amplifi er shuts down only while vehicle is running = voltage protection circuitry is engaged.
Voltage to the amplifi er is not within the 10–16 volt operating range. Have the vehicle’s charging and electrical
system inspected.
Amplifi er will only play at low volume levels = short circuit protection is engaged. Check
for speaker wires shorted to each other or to the vehicle chassis. Check for damaged speakers or speaker(s)
operating below the minimum recommended impedance.
No or low output?
Check the balance control on source unit
Check the RCA (or speaker input) and
speaker output connections.
Alternator noise-whining sound with engine’s RPM?
Check for damaged RCA (or speaker input) cable
Check the routing of RCA (or speaker input) cable
Check the source unit for proper grounding
Check
the gain settings and turn them down if they are set too high.
Reduced bass response? Reverse a speaker connection from positive to negative on the stereo/subwoofer
channel(s); if the bass improves, the speaker was out of phase.
Ground Noise? KICKER amplifi ers are engineered to be fully compatible with all manufacturers’ head units.
Some head units may require additional grounding to prevent noise from entering the audio signal. If you are
experiencing this problem with your head unit, in most cases running a ground wire from the RCA outputs on the
head unit to the chassis will remedy this issue.
CAUTION: When jump starting the vehicle, be sure that connections made with jumper cables are correct.
Improper connections can result in blown amplifi er fuses as well as the failure of other critical systems in the
vehicle.
If you have more questions about the installation or operation of your new KICKER product, see the Authorized
KICKER Dealer where you made your purchase. For more advice on installation, click on the SUPPORT tab on
the KICKER homepage, www.kicker.com. Choose the TECHNICAL SUPPORT tab, choose the subject you are
interested in, and then download or view the corresponding information. Please E-mail support@kicker.com or
call Technical Services (405) 624-8583 for unanswered or specifi c questions.
Adjustable Subsonic Filter (SUB): The variable subsonic fi lter will provide a cut-off point for lower frequencies
(10–80Hz) that could potentially damage your speakers from over-excursion, along with wasting your amplifi ers
power. The setting for this control should be set relative to your speaker’s low-frequency capability.
Remote Bass-KXRC: With the KXRC remote bass level control, you have the ability to control the output level
of the amplifi er remotely. To surface-mount the KXRC remote bass level control, simply screw the remote to the
chosen location, then run the cable from the controller to the “Remote Bass” jack on the amplifi er panel. Do NOT
connect/disconnect while the amplifi er is on. See page 5.
2013 KX 5-Channel Amp Rev D.indd 72013 KX 5-Channel Amp Rev D.indd 7 11/8/2012 11:03:50 AM11/8/2012 11:03:50 AM
7


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