OPERATI
INSTAl~
MANUAL
N/
N
Clarion
APX480M
Power System Amplifier
INTRODUCTION
is
The Clarion APX480M
a full-featured four-channel amplifier incorporating
the following features:
• Specially coated circuit boards, that resist mold, mildew and moisture
damage.
• Pulse-Width Modulated (PWM) MOSFET power supply for maximum
performance with minimal distortion.
• Remote turn-on with "soft start" muting to prevent turn-on
HthumpH.
• Advanced circuitry design featuring bridgeable and mixed mode operation
for use
in
various system configurations including4,3,
or 2 channel
systems.
• Variable high-passllow-pass electronic crossover with a 12dB per octave
slope (adjustable range: 55Hz to 5.5kHz).
• Variable bass boost circuit to reinforce low frequency signals that may be
lost due to subwoofer enclosure design.
• Adjustable input level controls with ground loop isolation to minimize noise
and distortion.
• 2-ohm stereo stable, 4-ohm mono stable.
• Gold-plated power, speaker, and RCA connectors.
• Speaker level input.
• Low profile construction with aluminum heat sink for efficient heat
dissipation.
ABOUT
THE MANUAL AND WARRANTY
This manual describes the basic requirements to install the Clarion
APX480M amplifier. The installation of this amplifier can be quite complex to
install, if you do not posses the necessary knowledge and tools to perform
this installation, please contact your local Clarion dealer.
Keep
all
instructions and sales receipt for future reference and warranty
information. Warranty information can be found
OF
TABLE
Description . . . . . , . . . . . . . , . . . . . . . . . . . . . . . . . . . . . 1
Input Connections and Audio Controls 1
Connections for Power and Speakers 3
Installation 4
Mounting Precautions 4
Wiring Precautions 4
Wiring and Applications
Setting the Gain 10
Setting the Crossover 10
Setting the Bass Boost 10
Final System Check
Troubleshooting
Product Specs 12
Clarion Limited Warranty 13
CONTENTS
on
page11of
75
11
11
this manual.
Owner's Manual
DESCRIPTION
The APX480M uses an unregulated MOSFET power supply for superior
sound and output wattage.Inaddition, a toroid-coil is used to transfer
power with minimal performance loss due to heat.Toavoid unwanted
noise, a double-sided conformal printed circuit board with strategically
placed components keeps AM RFI subdued.
All
of
the connections and controls for the APX480M are conveniently
located at the endsofthe amplifier and labeled appropriately.Toensure
the best possible electrical connections, the power, speaker, and RCA
inputs are gold-plated. An additional benefit
create a
2,3,or 4 channel amplified system with a flipofa switch (see
Application section).Inthe eventofcomponent failure or a short circuit, the
APX480M incorporates safe guards and an outboard ATC fuse to prevent
damage to the amplifier
INPUT CONNECTIONS AND AUDIO CONTROLS
The front panelofthe APX480M contains both connections for RCA and
speaker level inputs, along with the audio controls as shown below.
Figure 1-
2 3
of
this amplifier is the ability to
0 INPUT
CJ
}:~~~r~
• e
CH3
:@CH4
C; • e
~
(£)
CH1
~ ~
re
2CH-IN e
l
a~ a~
\!) \!)
CH2 CH4
e
,GAIN,
CH3 CH1/2 CH3/4 CH1/2
:':~
EX~:~gER
:':~d,:~
CH1/2
FREQ
CH1/2 FILTER
55
.110
:Q'"
LPHPOFF
t:Jj]
2CH
~H
'~t
BASS
CH3/4FREQ-RANGE-
55
.110
:Q'"
CH1/2-MODE-CH3/4
CH1/2
STEREO
MONO MONO
~.
c"EJil
MONO MONO
0:::::.
CH1
",1"
'~4
CH3/4 FILTER
LPHPOFF
rn
PO
OWER
0 D
~
,~:.~:
CH1
(BV~E~INPUT
c,,4i:
e •
-
~
(£)
~
C;1::::E:~~~~~~~~=t=~=I=~=t====1F==~F==~:::::::E~=:I~
11
12 13 14 15
1.CH3/4 Speaker Level Input
2.CH1/2 RCA Level Input
3.CH3/4 RCA Level Input
4.CH1/2 Gain Control
5.CH3/4 Gain Control
6.CH1/2 Bass Extender
7.
Source Select
8.CH1/2 Mode Switch
9.CH3/4 Mode Switch
10.
CH
1/2 Speaker Level Input
11.CH1/2 Frequency Control
12.
CH
1/2 Crossover Mode Switch
CH
13.
14. Frequency Range Multiplier
15.
3/4 Frequency Control
CH
3/4 Crossover Mode Switch
Clarion
The RCA connections are gold plated for optimum performance and low signal loss. The RCA connectors are labeled CH 1 (front left), CH 2 (front right),
CH
3 (rear left), and CH 4 (rear right).Inapplications where RCA signals are
not present, the speaker level output from the head unit can be used. (Use
one or the other input, not both.)
• Gain
the nominal operating level
250mV to 2.5V for RCA inputs and 500mV to 5V for speaker level inputs, can
accommodate input levels from virtually any head unit.
e
•
•
• CH 1/2 FREQ / CH 3/4 FREQ
• CH 1/2
Controls
Bass
Extender
band) Bass Boost circuit. It acts much like an equalizer with an adjustable
gain from 0 to +18dB fixed at 45Hz. Use this feature to tune low-frequency
audio response to compensate for a less than ideal subwoofer enclosure
design. The added boost produces rich, full bass tones that are normally
difficult to reproduce
undesired, set Bass Extender to
Source
2 CH BASS: Uses CH 1/2 inputs and has output from all 4 channels with
Bass Extender.
2 CH: Uses CH 1/2 inputs and has output from all 4 channels. The Bass
Extender will work only on
4 CH: Uses all 4 channel inputs and has output from all 4 channels. The
Bass Extender will work only on
Output
STEREO: Full left and right stereo operation.
CH 1Mono / CH 2 Mono: Single channel input for bridged operation. This
especially usefulinhigh-powered systems. (Uses
CH
1/2 Mono / CH 3/4 Mono: Allows for a stereo input to be summed into a
mono output.
adjustable from 55Hz to 550Hz. While CH 3/4-crossover frequencies are
adjustable from 55Hz to 5500Hz (via the Frequency Range Multiplier) for a
wider range
manufacturer's recommended crossover frequencies to quickly design a
more advanced system.
set to OFF, varying the frequency control will have no effect.
CH 3/4 filter switch to either HP or
55-550Hz (via CH 1/2 Freq) and CH 3/4
(via CH 3/4 Frequency and Frequency Range Multiplier). Use this feature
along with your speaker manufacture's recommended crossover
frequencies to design a more advanced system.
Select
Mode
Filter
APX480M
- Separate CH 1/2 and CH 3/4 gain controls allow you to set
- The amplifier features a "high-Q" (i.e. narrow frequency
Selector
of
crossover points. Use this feature along with your speaker
I CH 3/4
Power
of
the amplifier. The amplifier's input range,
in
the car audio
CH
Switch:
NOTE: If either
Filter
- A filter is activated by sliding the CH 1/2 and
System
environment
OdS.
1/2 and have no effect on
CH
1/2 and have no effect on
(CH 1/2
..
The CH 1/2-crossoverfrequencies are
LP.
CH 1/2 is fully adjustable from
Amplifier
NOTE: If bass boost is
CH
3/4.
CH
and
CH 3/4)
CH
2 and CH 4 inputs.)
of
the Crossover Mode Switches is
is
fully adjustable from 55-5500Hz
3/4.
is
2
clarion Operation/Installation
•
CH
3/4
Frequency
increases the crossover frequencyofCH
Example: If the frequency hertz dial is set to 240Hz, pushinginthe
Frequency Range Multiplier changes the setting to 2400Hz.
Range
Multiplier
- When engaged, this switch
3/4 by a factorof10.
Manual
CONNEcnONS
The rear panelofthe APX480M contains power and speaker connections as
shown below.
FOR
POWER
AND
SPEAKERS
Figure 2
7
1.CH1 Speaker Output
2.
CH2 Speaker Output
3.
Ground Input
4.
Remote Turn-on Input
8
5.
Battery + 12v Input
6.
(2) 25Amp Fuses
7.
CH3 Speaker Output
8.
CH4 Rear Speaker Output
Figure 3 - Electrical connections
Right FrontSpeaker (-)
leftFrontSpeaker(-)
3
clarion
INSTALLATION
This section suggests Mounting and Wiring Precautions for installing the
Clarion APX480M amplifier. If you do not posses the necessary tools and
installation experience, do not attempt
tact your local Clarion dealer to perform the installation.
APX480M Power System Amplifier
to
install this amplifier. Instead, con-
MOUNTING
Prior to mounting the amplifier, make sure itissafetomount the amplifier in
that location. Failure
addition, stainless steel hardware should be used to mount the amplifier and
additional accessories. When possible, use a nut and bolt with a lock washer to secure the amplifier. Extra care and attention
installations due to the uncertainty of water conditions.
Additional precautions and suggestions:
1.
For the most efficient cooling, mount the amplifier so cool air runs along
the length
movement and circulation, a cooling fan can be installed.
2.
Mount the amplifierona rigid surface; avoid mounting to subwoofer
enclosures or areas prone
3.
Prior to drilling and holes, make sure the proposed mounting holes will not
cut into the fuel tank, fuel lines, electrical wiring, or through the boat.
4.
Do
not mount the amplifier where itissusceptibletowater.
WIRING PRECAUTIONS
Read allofthe wiring precautions priortomaking any connections. If you
are unsure and/or don't have the necessary installation hardware, contact
your local Clarion dealer to perform the installation.
1.
Before you begin the installation, make sure the source unit Power switch
isinthe OFF position.
2.
Disconnect the negative (-) leadofthe battery (or batteries) before making
any power connections.
3.
When making connections, be sure that each connection is clean and
secure. Insulate final connections with electrical tape or shrink tubing.
Failure to do so may damage your equipment.
4.
A good groundiscritical for the performanceofthe amplifier. A ground
wire should be run directly from the battery to the amplifier. Use black
insulated 10-gauge or larger wire for the amplifier's ground (-) power lead.
5.
Addanadditional fuse holder and fuse at the positive (+) terminal of the
battery. The fuse rating should equal the total current consumption at full
output
amplifie(s positive
complete installation has been performed.
PRECAUTIONS
to
do so can result in serious damage to the boat.
is
necessaryinmarine
of
the heat sink, rather than across them.Toincrease air
to
vibration.
of
the amplifier(s). Use red insulated 10-gauge or larger wire for the
(+) power lead. Do not install the fuse until the
In
4
Loading...