BOSSCO CXX502 User manual

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User's Manual
2-CHANNEL BRIDGEABLE
4-CHANNEL BRIDGEABLE
CXX502 CXX1002
CXX1602 CXX2002
CXX2502
CXX1204 CXX1604
CXX2004 CXX2404
CXXM1250
CXXM1800
CXXM2200
•02 CXX1602 CXX2002 CXX2502
E POWER AMPLIFIERS 2-CHANNEL BRIDGEABLI
CXX1204 CXX1604 CXX2004
4-CHANNEL BRIDGEABLE POWER AMPLIFIERS
2404
CXX2705
5-CHANNEL BRIDGEABLE POWER AMPLIFIERS
CXXM1250 CXXM1800 CXXM2200
MONOBLOCK POWER AMPLIFIERS
BOSS Audio Systems
3451 Lunar Court • Oxnard, CA 93030
www.bossaudio.com
800.999.1236
AUDIO SYSTEMS
tech support: www.bossaudio.com/support

AUDIO SYSTEMS
CXX502
CXX1002
CXX1602
CXX2002
CXX2502
Two Channel
MOSFET Car Audio
Amplifiers
CXX1204
CXX1604
CXX2004
CXX2404
Four Channel
MOSFET Car Audio
Amplifiers
CXX2705
Five Channel
MOSFET Car Audio
Amplifier
USER’S MANUAL
page CONTENTS
2 Introduction
2 What is included?
3 Features
3 About 2 Q operation
4 General precautions
4 Installation precautions
4 Mounting the amplifier
5 Connecting the amplifier
6 Low level input wiring
9 High level input wiring
12 2 C H Power and Speaker wiring
2CH and Bridged Modes
CXXM1250
CXXM1800
CXXM2200
MonoBlock
MOSFET Car Audio
Amplifiers
Congratulations on your
purchase of a 10U
AUDIO SYSTEMS
CHAOS EXXTREME II Amplifier.
13 4CH Power and Speaker wiring
4CH and Bridged Modes
14 5CH Power and Speaker wiring
5CH and Bridged Modes
15 MonoBlock Power and Speaker wiring
16 Troubleshooting
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.
17 Specifications
Thank you for making 30H>
AUDIO SYSTEMS
your choice for car audio
entertainment!
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 1

Introduction
What is included?
With the 30US CHAOS EXXTREME II
MOSFET amplifier series, we are
introducing thirteen new amplifiers, all
designed in the USA. This new series
includes three monoblock amps,five
2-channel, four 4-channel amplifiers
and a 5-channel amp.
All CHAOS EXXTREME II models feature
variable low pass and high pass
crossovers and variable input gain
controls.
For further flexibility in the use of a
subwoofer, 0-+18dB Bass Boost
control has been included on all
amplifiers. You can control the
subwoofer level with the remote level
control module.
SsSS understands that amplifiers are
placed in many different kinds of
installations, so we incorporated a very
flexible system of controls in these
amplifiers in order to help you integrate
the amp into your system regardless
of the nature of your input source.
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.
• CHAOS EXXTREME II amplifier
• Remote subwoofer control
• High input cable with connector
• Four (4) mounting screws
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 2
Features
About 2 Q operation
Your new CHAOS EXXTREME II amplifier
features the following:
• Class A-B operation
• Bridgeable outputs
(except CXXM1250 CXXM1800
and CXXM2200)
• MOSFET PWM (Pulse Width
Modulated) Power Supply
• 2 Q stable stereo operation
with output power increase
• Thermal and speaker short
protection
• Soft turn-on circuit
• Remote turn-on/turn-off circuit
• Variable input gain control
• Variable low pass crossover(s)
• Fixed high pass crossover(s)
• Variable 0 to +18dB Bass Boost
• Nickel-plated RCA low level and
high level inputs
• LED power and protection
indicators
Your CHAOS EXXTREME II amplifier
has been designed to operate
efficiently at loads down to 2Q.
This means that you can install four
8 Q speakers per channel, when
using parallel wiring.
Increasing the number of woofers per
channel at low frequencies (below
100Hz) produces an acoustic coupling
effect. This acoustic coupling effect
increases your power output by about
3dB per speaker, or the equivalent of
an additional 10W per speaker.
When operating at 2Q, the
amplifiers will increase their output
power by approximately 50%. The
current draw will also increase by
about the same amount, so be sure
you have enough current to run the
amplifiers into a 20 load.
If you lack adequate current, your
music reproduction will be distorted.
• Silver anodized heatsink
• Remote subwoofer control
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 3

General precautions
Before installing and using your
new 30M» amplifier, please be-
AUDIO SYSTEMS 1 71
come familiar with all the infor¬
mation 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 wire and send the amplifier to
your local dealer or service center as
soon as possible .
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.
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.
SHOCK HAZARD! Do not open the case
of this product. There are dangerous
voltages present within the unit. There are
no user-serviceable parts within the unit.
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 4
Connecting the amplifier
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 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 8
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
8 gauge (or heavier) cable from this
fuse to the amplifier location.
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 #4 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.
Don't misuse the
level control!
Do not mistake the input level control
for a volume control! It is designed
ONLY to match the output level of
your audio source to the input level
of your amplifier.
Do not adjust this input level to
maximum unless your input level
requires it.
Ignoring these instructions will result
in an input overload to the amplifier,
and excessive audio distortion. It
can also cause the protection circuit
to engage.
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 5

Low Level Input Wiring
Low-level (RCA) input wiring is preferred for best audio performance. Always use
a high-quality RCA cable for best audio performance.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
Remote
Subwoofer Control
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 6
Low Level Input Wiring
Low-level (RCA) input wiring is preferred for best audio performance. Always use
a high-quality RCA cable for best audio performance.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
Outputs of head
unit or signal
processor
Outputs of head
unit or signal
processor
O l I
□□□□□ a
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 7

Low Level Input Wiring
Low-level (RCA) input wiring is preferred for best audio performance. Always use
a high-quality RCA cable for best audio performance.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
MonoBlock Amplifier
CXXM1250
CXXM1800,CXXM2200
Ol
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 8
High Level Input Wiring
The high level input(s) should only be used when your head unit lacks RCA outputs.
If the RCA outputs are not present, connect the speaker outputs from the receiver
to the high level input connector of the amplifier. Be sure to observe polarity to
avoid audio phase problems.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
2-Channel Amplifiers
CXX502, CXX1002, CXX1602, CXX2002, and CXX2502
Remote
Subwoofer Control
To Speaker Terminals
of head unit
4-Channel Amplifiers
CXX1204, CXX1604, CXX2004 and CXX2404
Remote
Subwoofer Control
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 9

High Level Input Wiring
The high level input(s) should only be used when your head unit lacks RCA outputs.
If the RCA outputs are not present, connect the speaker outputs from the receiver
to the high level input connector of the amplifier. Be sure to observe polarity to
avoid audio phase problems.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
5-Channel Amplifier
CXX2705
Remote
of head unit
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 10
High Level Input Wiring
The high level input(s) should only be used when your head unit lacks RCA outputs.
If the RCA outputs are not present, connect the speaker outputs from the receiver
to the high level input connector of the amplifier. Be sure to observe polarity to
avoid audio phase problems.
NOTE: Do not connect BOTH the high level and low level inputs from your
receiver to your amplifier at the same time!
MonoBlock Amplifier
CXXM1250
MonoBlock Amplifiers
CXXM1800,CXXM2200
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 11

Power and Speaker Wiring 2-Channel Amplifiers
2 Channel and Bridged Modes CXX502, CXX1002, CXX1602,
CXX2002, and CXX2502
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 12
Power and Speaker Wiring
4 Channel and Bridged Modes
4-Channel Amplifiers
CXX1204, CXX1604, CXX2004 and CXX2404
Connect the Negative (-) terminal of the LEFT subwoofer to
the CH2 (-) amplifier terminal.
Connect the Positive (+) terminal of the LEFT subwoofer to
the CHI (+) amplifier terminal.
to REMOTE TURN-ON
terminal of head unit
SPEAKER
IMPEDANCE
4-8 Q
Connect the Negative (-)
terminal of the RIGHT
subwoofer to the CH4 (-)
amplifier terminal.
Connect the Positive (+)
terminal of the RIGHT
subwoofer to the CH3 (+)
amplifier terminal.
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 13

5-Channel Amplifier
CXX2705
Power and Speaker Wiring
5 Channel and Bridged Modes
Five
Channel
Connect the Negative (-) terminal of the LEFT
subwoofer to the CH2 (-) amplifier terminal.
CH5
Connect the Positive (+) terminal of the RIGHT
subwoofer to the CH3 (+) amplifier terminal.
CHAOS EXXTREMEII MOSFET Amplifier User’s Manual - page 14
Monoblock Amplifiers
CXXM1250 CXXM1800 and CXXM2200
Power and Speaker Wiring
MonoBlock Mode
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 15

Troubleshooting
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.
SYMPTOM POSSIBLE REMEDY
Amplifier will not
power up.
Check to make sure you have a good ground connection.
Check that the Remote Input (Turn-On) has at least 3VDC.
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 LED is not illuminated. If it is lit, shut off
the amplifier briefly, and then repower it.
Protection LED
comes on when
amplifier is
powered 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 LED still
comes 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 settings.
Audio present in
only one channel.
Check the RCA interconnect cables.
Check all speaker wiring.
High hiss in the
speakers.
Disconnect all RCA inputs to the amplifiers. If the hiss disappears, then
plug in the component driving the amplifier and unplug its inputs. If the
hiss disappears at this point, go on until the faulty/noisy 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. Try 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.
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.
Amplifier gets
very hot.
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.
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 16
Specifications
MODEL
AUDIO SYSTEMS
2-Channel MOSFET Amplifiers
CXX502 CXX1002 CXX1602 CXX2002 CXX2502
RMS Power
into 4 O
100 W x 2 175 Wx 2 240 Wx2 300 Wx 2 500 Wx 2
MAX Power
into 2 Q
250 W x 2
500 W x 2 800 W x 2 1000 W x 2 1250 WX2
Bridged Power
500 W x 1
1000 Wxl
1600 Wxl 2000 W x 1 2500 W x 1
into 4 Q
Min. Speaker 2 Q Stereo
Impedance 4 0 Mono Bridged
THD + N 3 0.01%-
Frequency Response 9 Hz - 50 KHz
S/N Ratio 103dB -
Channel Separation 90 dB -
Low Pass Filter 35 Hz -160 Hz.
High Pass Filter Fixed, 80 Hz -
Bass Boost Variable 0 -+18 dB -
Fuse Rating 30 A 40 A
Dimensions (Length): 8.27"(L) 12.20"(L)
(Wx H)(11.00" x 2.87")
25 A x 2 30 Ax 2 40Ax2
13.78"(L) 15.75"(L) 19.69"(L)
4-Channel
MOSFET Amplifiers
5-Channel
MOSFET
Amplifier
MonoBlock
MOSFET
Amplifiers
MODEL
CXX1204 CXX1604 CXX2004 CXX2404 CXX2705 CXXM1250 CXXM1800 CXXM2200
RMS Power
into 4 Q
MAX Power
into 2 Q
Bridged Power
into 4 Q
Min. Speaker
Impedance
100 Wx4 150 Wx4 200 W x 4 300 W x 4 150Wx4 +
600 Wxl
300 W x 4 400W x 4 500Wx4 600Wx4 450Wx4 +
900 Wxl
600 W x 2 800 W x 2 1000 Wx 2 1200 W x 2 600Wx2
2 Q Stereo
4 Q Mono Brimged
0.01 % -
500 Wxl 700 Wxl 900 Wxl
1250WX1 1800 Wx 1 2200 Wxl
n/a n/a n/a
2 Q 2 Q 2 Q
THD+N
Frequency Response 9 Hz - 50 KHz -
S/N Ratio 103 dB -
Channel Separation 90 dB -
Low Pass Filter 35 Hz -160 Hz -
High Pass Filter Fixed, 80 Hz -
Bass Boost Variable 0 - + 1 8 dB -
Switchable 0 / +18 dB
Input Mode Selector n/a n/a n/a
Fuse Rating 25Ax2 30Ax2 35Ax2
Dimensions (Length) : 12.99" (L) 13.78"(L) 16.93"(L) 23.23"(L) 20.28"(L)
(WxH)(11.00" x 2.87")
9 Hz-130 Hz 9 Hz-130 Hz
n/a n/a n/a
0/+18 dB
n/a 4CH/5CH
30 A x 3 30A x 3
- 40Hz-130Hz 40Hz-130Hz
n/a n/a n/a
- 0 - +12dB 0 - +12dB
0/+18 dB
n/a n/a n/a
30A 25 A x 2 30Ax2
10.63"(L) 13.78"(L) 16.93"(L)
All specifications subject to change without notice.
CHAOS EXXTREME II MOSFET Amplifier User’s Manual - page 17