Amplifier will
Check for good ground connection.
not
power up*
Check that Remote Input (turn-on)
at amplifier has at least
3
volts DC.
Check that there is battery
on the
+
terminal.
Check that there
Che&d
High hiss in
speakers.
EEiP
squeal
noise from
'
speakers.
Distorted
sound
Disconnect all RCA inputs to the
amplifier(s)
-
if hiss disappears, then
plug in the component driving the
amplifier and unplug its inputs. If
hiss disappears, go on until the
faultylnoisy component is found.
It is best to set the amplifier's input
level as insensitive as possible. The
best subjective
SIN
ratio is
obtainable this way.
Try
to drive as
high a
signal
level from the head
unit
as
possible.
This is.alrnost always caused by a
poorly-grounded RCA interconnect.
Check that the Level control(s) is set
to match the signal level of the
head unit. Always begin at the
lowest setting.
Check that all crossover frequencies
have been properly set.
-
Check for short circuits on the
speaker leads.
&pl,ifier(s)
,
,
Check thatthe minimum speaker
impedance for that modelis correct.
gek very hot.
-
-
Check .that there is good airflow
around the amplifier. In some
applicaitierns, an dermal cooling
fan
may be iequired.
Engine noise
This is caused primarily by poor
quality RCA cables picking up
(static
type)
radiated noise. Route all RCA cables
away from power wires, and use
only the best quality cables.
Engine noise
Check that the speaker leads are not
(alternator
shorted to the vehicle chassis.
whine)
Check thawhe RCA grounds are not
shorted to the vehicle chassis.
Check that the head unit is
correctly grounded.
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