© 2019 Stinger • www.stingerelectronics.com
Amplifier Owner’s Manual
Troubleshooting
No power
: Check voltage at amplifier with a DMM (volt meter), B+
and REM (with head unit on) the voltage should register between
12.2V and 14.6V when using the attached ground lead of the
amplifier. Check fuse at amplifier and at the battery. Use a meter
to verify connection from one end of the fuse to the other, breaks
may not always be visible. If the fuse is blown, check the power
wire and also the amplifier for a short. If the short is in the amplifier
itself, see your Stinger dealer. If no short is present, replace the
fuse.
Power without sound
: Turn the amplifier off and check all input and
output signal cables and power connections. Check the speakers
for shorts with a DMM (volt meter) or by connecting them to
another audio source. After making sure everything is correct, turn
the amplifier on again.
“Motor Boating” - the power indicator going off repeatedly when
the audio system is on
: Check the amplifier’s connection to the
battery. Check battery voltage. If low, recharge or replace the
battery. Check all ground connections.
Power without sound and the PROTECT LED is lit
: The red PROTECT
LED lights when the amplifier shuts down for either thermal or over-
current protection. A high internal amplifier operating temperature
will trigger thermal shutdown: after it cools about 5°C, the amplifier
will restart. A shorted speaker lead or operation into unusually low
impedance loads will trigger over-current shutdown: cycle power
at the amplifier REM terminal to restore operation. Check for
shorted speaker wiring or damaged speakers or crossover systems
if over-current shutdown occurs.
No sound from one side
: Check the balance control in the head
unit. Check speaker connections. Check signal input connection.
Frequent amplifier shutdown with automatic recovery
: This
indicates chronic amplifier thermal shutdown because of
operation at consistently high internal temperatures. High
operating temperature can be caused by inadequate ventilation.
Make sure you are not running a lower than recommend
impedance. Also check for damaged speakers or passive
crossover systems. Finally, chronic thermal shutdown may result
from otherwise normal operation of the amplifier at elevated
output power levels, which can be resolved by providing
additional amplifier cooling, installing a higher-power amplifier, or
reducing amplifier output level.
Very low output
: Check your head unit’s fader control or the
amplifier’s input sensitivity level. Make sure HP frequency control is
not set too high and LP frequency control is not set too low at the
same time.
WARRANTY:
LIMITED WARRANTY ON AMPLIFIERS
Stinger warrants this product to be free of defects in materials and
workmanship for a period of one (1) years from the original date
of purchase. This warranty is not transferable and applies only to
the original purchaser from an authorized Stinger dealer in the
United States of America only. Should service be necessary under
this warranty for any reason due to manufacturing defect or
malfunction, Stinger will (at its discretion), repair or replace
the defective product with new or remanufactured product at no
charge. Damage caused by the following is not covered under
warranty: accident, misuse, abuse, product modification or
neglect, failure to follow installation instructions, unauthorized
repair attempts, misrepresentations by the seller. This warranty
does not cover incidental or consequential damages and does
not cover the cost of removing or reinstalling the unit(s). Cosmetic
damage due to accident or normal wear and tear is not covered
under warranty.
INTERNATIONAL WARRANTIES:
Products purchased outside the United States of America are
covered only by that country’s Authorized Stinger reseller and not
by Stinger. Consumers needing service or warranty information for
these products must contact that country’s reseller for information.
