subwoofers and produce
hm
your new Planet Audio amplifiers.
high
Sound Pressure Levels
(SPL).
We are sure you will enjoy many years of high performance
I
This Planet Audio amplifier
Compromise" design philosophy. The built-in features provide optimum flexibility for system design.
When you review the features ad specifications for you PA1200D/PA2500D, you will agree
bs
set a new standards of excellence for car audio performance.
has
been built and tested to the highest standards. The amplifier follows a "Zero
that
Plaflet
Audio
I
This amplifiers design philosophy
be
adhered
to
at
all
times.
h4himum
and
mode of regulation requires that proper installation
h-ce
recommend
is
1
ohm.
and
load imwce instructions
This amplifier
r~m
has
tsn
~~ciatly
Be smaker(sS as Der the
the
Remote Lgvel Controller
the cable to-~lifier
fused
.?r
larger)
=
\-
at
wire
L.
90
amperes
to
the
witinn
and
lifier
remote
V
in
lug
(3x30).
uimm
'se
amplifiers are extremely heavy.
npWer,
on
the
12v
turn-on
diamams
"
he
car where
in
the
connector.
This
fuse
rating
imwce
so
as
not to
POSITIVE
lead
in this manual*
it
can easily
above
damage
Id
of the head unit.
should
)
these
the chassis
be
reached
be
sufficient
hses
from
under
ma1 working
may blow, therefore
with
a
drill
or screwdriver.
3
remove
the driver's seat.
.
This
the
vhich foll
-
1
1
Set
the
A
his
amplifier is designed to run with a minimum load of 1 Ohm. Operating this
controls as
amplifier with a load or speaker impedance less than 1 Ohm could result in
poor sound quality
desdribed
in the following sections of this manual.
andlor damage to amplifier.
continuous
-
-.
-
.
.
.
. .
''
fi:@o~tiunons
:4
.
over
Input
Impedan
Pm,
Power,
:
Low
Pass
imo
into
2
Olrm
1
81rm
50Hz
-
250Hz, 24dBlOctave
Peak
Current consumption,
Weight,
1k.
at
rated
power
into
4
Ohm
90
Amps
'Features
My regulated, Pulse-Wldth Modulated supply
.. .
*
battery
voltages Ween 11.5~
(r
Optically-isolated (from internal amplifier
.#
aUM.
designed,
dtifilar-wound power transformers
and
16v
assures
drcuitry)
constant
remote input
rcuits, uslng discre
powu
delivery at
all
Audio
@
Front
@
Low
@
Hlgh
;:.
High gain bias tracking circuit controls idling current within tight tolerances over the full
operating temperature range of the amplifier.
Amolifiers:
.
end
pass
crossover fixtures a 24dBloctave slope
pass
o
Amplifiers:
.
preamplifiers accept up to volts of
subsonic
Prearno Circuits
crossover
fm
Poluer
signal
input
a
24dBIoctave slope
Amplifier
Circuits
Amplifier will
not
power up*
Check for good ground connection.
Check that Remote Input (turn-on)
at amplifier has at least
Check that there is battery power on
3
volts DC.
High hiss in
speakers.
Disconnect all RCA inputs to the
amplifier(s) - if hiss disappears, then
plug in the component driving the
amplifier and unplug its inputs.
disappears, go on until the
faulty/noisy component is found.
It is best to set the amplifier's input
level as insensitive as possible. The
best subjective
this way.
SIN
ratio is obtainable
If
hiss
High squeal
noise from
speakers.
Distorted
sound
Amplifier(s)
gets very hot.
Engine noise
(static type)
This is almost 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 cirmits on the speaker
leads.
Check that the minimum speaker
impedance for that model is correct.
Check that there is good airflow
around the amplifier. In some
applications, an external cooling fan
may be required.
This is caused primarily by poor
quality RCA cables picking up radiated
noise. Route all RCA cables away from
power wires, and use only the best
quality cables.
Engine noise
(alternator
whine)
Check that the 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 correctly
grounded.
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