Boss CX2500D, CX3500D User Manual
CONTENTS
U S E R ’ S M A N U A L
2 Introduction
2 Features
3 What is included?
3 General precautions
3 Installation precautions
3 Mounting the amplifier
4 Connecting the amplifier
5 Important system considerations
5 Tips for a safe system
6 Low level input wiring
6 Speaker wiring
7 Power connections
Normal and with Stiffening Capacitor
8 Bridging two CHAOS EXXTREME
CLASS D Amplifiers
10 Troubleshooting
11 Specifications
Congratulations on your
purchase of a
CHAOS EXXTREME Class D
Amplifier.
It has been designed, engineered
and manufactured to bring you
the highest level of performance
and quality, and will afford you
years of listening pleasure.
Thank you for making
your choice for car audio
entertainment!
page
CX3500D
CX2500D
CLASS D MonoBlock
Car Audio Amplifiers
CX2500D • CX3500D Amplifier User’s Manual - page 1
CX2500D • CX3500D Amplifier User’s Manual - page 2
Introduction
With the CHAOS EXXTREME
Class D amplifier series, we are
introducing two new CLASS D
amplifiers, both designed in the USA.
These CHAOS EXXTREME models
feature variable low pass and subsonic
filters and a variable input gain control.
The CX2500D and CX3500D also
incorporate a phase selector switch
to help compensate for time delays in
subwoofer applications.
For further flexibility in the use of a
subwoofer, a variable 0-+18dB Bass
Boost control has been included.You
can control the subwoofer level with
the remote level control module.
understands that amplifiers are
placed in many different kinds of
installations, so we have also included
an input sensitivity control to help you
integrate the amp into your system
regardless of the nature of your input
source.
A special feature on this Class D amp
is DataLink circuitry, which allows you
to “strap” together two CX2500D’s or
two CX3500D models for an
astounding total maximum output
power of 5000 or 7000 watts,
respectively.
Features
Your new CHAOS EXXTREME amplifier
features the following:
• Class D operation
• MOSFET PWM (Pulse Width
Modulated) Power Supply
• One Ohm stable mono operation
• Thermal, overload and speaker
short protection
• Soft turn-on circuit
• Remote turn-on/turn-off circuit
• Variable input gain control
• Input voltage sensitivity selector
• Variable subsonic filter: 14-40 Hz,
12dB/octave
• Variable low pass filter: 50-150 Hz,
12dB/octave
• Variable 0-+18dB Bass Boost
• 0/180º Phase Shift selector
• Nickel-plated RCA low level inputs
• Nickel-plated speaker and power
terminals
• LED power and protection
indicators
• Black anodized heatsink
• Remote subwoofer level control
CX2500D • CX3500D Amplifier User’s Manual - page 3
Installation precautions
Before you drill or cut any holes,
investigate your car's layout very
carefully. Take special care when you
work near the gas tank, fuel lines,
hydraulic lines and electrical wiring.
Never operate the amplifier when it is
unmounted. Attach all audio system
components securely to prevent
damage, especially in an accident.
Before making or breaking power
connections in your system, disconnect
the vehicle battery. Confirm that your
head unit or other equipment is turned
off while connecting the input jacks and
speaker terminals.
If you need to replace the power fuse,
replace it only with a fuse identical to
that supplied with the amplifier. Using
a fuse of a different type or rating may
result in damage to your audio system
or your amplifier which is not covered
by the manufacturer's warranty.
Mounting the amplifier
1. Find a suitable location in the vehicle
in which to mount the amplifier.
2. Make sure there is sufficient air
circulation around the intended
mounting location.
General precautions
Before installing and using your new
amplifier, please become familiar with all the information contained in this manual.
Please keep this manual in a safe
place for future reference.
• Do not open or attempt to repair this
unit yourself. Dangerous high voltages
are present which may result in electric
shock. Refer any repairs to a qualified
service technician.
• To avoid risk of electronic shock or
damage to the amplifier, do not permit
any of this equipment to become damp
or wet from water or drinks. If this does
occur, immediately unplug the power
wires and send the amplifier to your
local dealer or service center as soon
as possible.
• If there is smoke or any peculiar odor
present during use or if there is damage
to any of the component enclosures,
immediately unplug the power cord
and send the amplifier to your local
dealer or service center as soon as
possible .
What is included?
When first unpacking your new
amplifier, please check first that the
package contains all of the items
below. If something is missing, contact
the store where you purchased the
amplifier.
• Class D amplifier
• Remote subwoofer level control
• Remote subwoofer control cable
• DataLink cable (for strapping two
identical CHAOS EXXTREME
Class D amps together)
• Four (4) mounting screws
CX2500D • CX3500D Amplifier User’s Manual - page 4
3. Mark the location for the mounting
hole screws by positioning the amplifier
where you wish to install it. Use a scribe
or mounting screw, inserted through
each of the amp's mounting holes, to
mark the mounting surface. If the
mounting surface is carpeted, measure
the hole centers and mark with a felt
tip pen.
4. Drill pilot holes in the mounting
surface for the mounting screws. Place
the amplifier in position, and attach
the amplifier to the mounting surface
securely using screws.
Before doing any wiring, look through
this manual and identify the diagrams
to follow for power, input and speaker
connections for your particular
installation. Be sure you understand
all the connections before you proceed.
1. Connect the amplifier’s power
ground terminal to the closest point
on the chassis of the car. Keep this
ground wire to less than 39" (100 cm)
in length. Use 4 gauge (or heavier)
wire.
2. Connect the remote terminal to the
remote output of the head unit using
16 gauge (or heavier) wire.
3. Connect an empty fuse holder within
18" (45 cm) of the car battery, and run
4 gauge (or heavier) cable from this
fuse to the amplifier location.
The purpose of placing a fuse in this
location is to protect your vehicle’s
battery in the event that this wire
accidentally touches the chassis
ground on its run to the amplifier.
Connecting the amplifier
4. Check that the fuse holder is empty.
Then connect the fuse holder to the
"BATT+" connection on the amplifier.
5. If multiple amplifiers are being used
in your system, either:
• Run a separate pair of cables from
the battery and a chassis ground point
to each amplifier. Each (+) cable must
have its own inline fuse.
-or-
• Run a #0 cable from the fuse holder
at the battery to a distribution block
at or near the amplifier's location. Then
run separate cables from the amplifier
to this distribution block and to
independent chassis ground points.
6. Connect all line inputs and outputs
(if used) using high-quality cables.
Connect all speakers, following the
diagrams in this manual. Be sure to
observe proper polarity to avoid audio
phase problems.
7. Insert fuse(s) into the battery fuse
holder(s).
8. Recheck all connections before
powering up the amplifier.
9. Set all level controls to minimum
position, and set all crossover
controls/switches to the desired
frequency points.
10. Power up the head unit and the
amplifier. Then set the volume control
on the head unit to about 3/4 volume,
and adjust the amplifier’s input level
control(s) to just below the level of
distortion.
11. Further fine tuning of the various
controls may be necessary to obtain
best results.
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