Kicker KMA Serie Manuel D'utilisation page 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 are
Power (PWR) & Protection (PRT) LEDs on the side panel of your Kicker KMA series amplifi er. Depending
on the state of the amplifi er and the vehicle's charging system, the LEDs will glow either green or red.
When the green LED is lit, this indicates the amplifi er is turned on and no trouble exists.
Green LED off, no output? With a Volt Ohm Meter (VOM) check the following:  +12 volt power
terminal (should read +12V to +16V)  Remote turn-on terminal (should read +12V to +16V)  Check
for reversed power and ground connections  Ground terminal, for proper conductivity.
Green LED on, no output? Check the following:  RCA connections  Test speaker outputs with a
"known" good speaker.  Substitute source unit with a "known" good source unit.  Check for a signal
in the RCA cable feeding the amplifi er with the VOM meter set to measure "AC" voltage.
Red LED fl ickering with loud music? The red LED indicates low battery voltage. Check all the
connections in your boat's charging system. It may be necessary to replace or charge your battery or
replace your alternator.
Red 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 your boat is running = voltage protection circuitry
is engaged. Voltage to the amplifi er is not within the 10–16 volt operating range. Have the boat'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. 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.  Check for reversed polarity at the speaker(s)
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.
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.
CAUTION: When jump starting the battery, 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 boat.
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.
2021 KMA MultiChannel Amps Rev G.indd 7 2021 KMA MultiChannel Amps Rev G.indd 7
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