8
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 KXM 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. 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.
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.
KXMA400.2
100 x 2 @ 4 ohms, 14.4VDC, 1% THD, CEA-2006B (Watts)
Signal to Noise Ratio -75dB CEA-2006B (ref: 1W, A-weighted)
KXMA1200.2
300 x 2 @ 4 ohm, 14.4VDC, 1% THD, CEA-2006B (Watts)
Signal to Noise Ratio -75dB CEA-2006B (ref: 1W, A-weighted)
KXMA400.4
50 x 4 @ 4 ohms, 14.4VDC, 1% THD, CEA-2006B (Watts)
Signal to Noise Ratio -75dB CEA-2006B (ref: 1W, A-weighted)
On our website you can discover more about marine subwoofers.
