Power
and
Speaker
Wiring
Monoblock
Amplifiers
EV1500M
Speaker
+
MonoBlock
Mode
SPEAKER
IMPEDANCE
2-80
{)
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fl
SE
BAn·
REMOTE
GROUND
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Monoblock
Amplifiers
EV2500M
Speaker
o 0
IBattery I
MonoBlock
Mode
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§§a:
EV2S00M
0
~
1
.us!
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o
If
IT
Q L
Oll
BAn ·
SPEAKER
IMPEDANCE
2-80
FUSE
__
Chassis
ground
point
to
REMOTE TURN-ON
terminal of head unit
o
o
Q
EVOLUTION
MOSFET
Amplifier
User's
Manual -
page
12
Trou
bleshooti
ng
If you experience operation or performance problems with this product, compare your
installation with the electrical wiring diagram on the previous pages. If problems persist,
read the following troubleshooting tips which may help eliminate the problems,
SYMPT
OM
POSSIBLE
REMEDY
Amplifier will not
Check to make sure you have a
good
ground
connection,
power
up.
Check that the Remote
Input
(Turn
-
On)
has
at
least 3
VDC,
Check that there
is
battery
power
on the (+) terminal,
Check that there
is
at
least
12v.
Check all fuses, replace
if
necessary.
Make sure that the Protection LEO
is
not
illuminated.
If
it is lit, s
hut
off
the amplifier briefl
y,
and
then repower
it.
I
Prot
ec
tion LED
comes
on
when
amplifier
is
po
we
red up.
Check for short circuits on speaker leads,
Turn
down
the volume control on the head
unit
to prevent overdriving.
Remove speaker leads,
and
reset the amplifier
If
the Protection LEO still
come
s on, then the amplifier
is
faulty
and
needs servicing,
No output.
Check that all fuses are
OK.
Check that amplifier
is
properly grounded.
Check that the Remote Input (Turn-On) has at least 3VDC.
Check that the RCA audio cables are
plugged
into the
proper
inputs.
Check all speaker wiring.
Low
output.
Reset the Level Control.
Check the Crossover Control setting
s.
Audio present in
only one channel.
Check the RCA interconnect cables.
Check all speaker wiring,
High hiss in
the
Disconnect all RCA inputs
to
the amplifiers.
If
the hiss disappears, then
speak
ers.
plug
in
the c
omponent
driving the amplifier
and
unplug its input
s,
If
the
hi
ss disappears
at
this
point
,
go
on until the faulty/
noi
sy
component
is
found.
It is
best
to
set the amplifier's
input
level
control
as
low
as
possible. The
best
subjective signal-to-noise ratio
is
achieved in this manner
Tr
y to set
the head unit
as
high as possible (without distortion)
and
the
amp
input
level
as
low
as
possible,
Squealing noise
from speakers.
Check for improperly
grounded
RCA interconnects.
Distorted sound.
Amplifier
gets
very hot.
Check that the
Input
Level Control is
set
to
match
the signal level of the
head unit. Always try to set the Input Level
as
low
as possible.
Check that all crossover frequencies are properly set.
Check for short circuits on the speaker leads,
.--
Check that the minimum speaker impedance for the
amp
model
is
correct.
Check that there
is
good
air circulation
around
the amp.
In
some
applications, it
may
be
necessary to
add
external cooling
fan(s),
Engine noise
(static type)
This
is
usually caused
by
poor
quality RCA cables, which can
pick
up
radiated noise, Use only the
best
quality cables,
and
route them away
from
power
cables,
Engine noise
(alternator
whine)
'---
-
, -
Check that speaker leads are
not
shorted
to
the vehicle chassis.
Check that the RCA grounds are
not
shorted to the vehicle chassis.
Check that the
head
unit
is
properly grounded,
-
--
EVOLUTION
MOSFET
Amplifier
User's
Manual -
page
13
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