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Troubleshooting
Problem
Possible Cause
Corrective Action
Amplifier does not
No power to +12V
Check fuse(s)
turn on
terminal
No power to REM
Check head unit fuse(s) and
terminal
wiring
Blown main fuse at
Replace fuse and identify
battery
cause of failure
Blown fuse at amplifier
Replace fuse and identify
cause of failure
Faulty ground
Re-ground main power
ground to bare metal
chassis
Volume control too
Input level control
Re-adjust the input level
sensitive
adjusted too high
(refer to page 8)
Distorted sound
Input level control
Re-adjust the input level
adjusted too high
(refer to page 8)
Blows fuse(s) at amp Power wires connected
Reconnect power wires
backwards
properly
Internal problem with
Take unit for service
amp
Engine noise I
Ground loop(s)
Use good quality shielded
Alternator whine
RCA cables
Faulty ground at amp
Re-ground amp to clean
bare metal chassis
Faulty ground at head
Re-ground head unit to
unit
clean bare metal chassis
Inductive coupling
Re-route RCA and/or
speaker wires away from
factory harnesses
Input level on amp set
Re-adjust input level (refer
too high
to page 8)
Thermal protection
Amplifier driving 2 ohm
If the amplifier " thermals"
activated
load (4 ohms bridged) for frequently while driving
long durations
subwoofers, install fan to
keep amp cool.
11
POWER 1500.50 5-Channel Amplifier
Short circuit
Blown speakers
Check all speakers
protection activated
Speaker wire(s) shorting Check for faulty wiring
to ground
Defective crossover
Faulty passive crossover
Low impedance
Amp connected to
Check speaker connections
protection activated
improper load
Amp will not drive a 2
Verify that speakers are
ohm bridged load, 4 ohm connected properly
minimum in bridged
configuration
Speakers defective/
Check speakers
blown
Faulty passive
Check crossovers
crossovers
Poor bass response
Speakers out of phase
Check speaker polarity;
reverse the connection to
one speaker only if two
subwoofers are connected
to the amplifier.
NOTE: If the protection light is activated with no speakers connected to
the amplifier, and all the power connections are correct, this would
indicate an internal problem with the amplifier.
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