Manual Boss CX250 (page 18 of 24) (English)

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CH1/2 BRIDGED

GROUND REMOTE BATT+

POWER CONNECTIONS

FUSES

CH3/4

BRIDGED

SPEAKERS

Troubleshooting

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 20

Specifications

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 21

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 5

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 10

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 14

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 15

CONTENTS

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 1

U S E R ’ S M A N U A L

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 4

General precautions

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 3

FeaturesAbout 2 Ohm operation

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 6

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 13

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 12

Notes

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 7 CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 9

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 16

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 17

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 18

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 19

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 8

CHAOS EXXTREME MOSFET Amplifier User’s Manual - page 11

Notes Notes

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.

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.

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.

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.

Tri-Mode

Before installing and using your

new amplifier, please be-

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 .

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.

Your CHAOS EXXTREME amplifier

has been designed to operate

efficiently at loads down to 2 Ohms.

This means that you can install four

8 Ohm 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 2 Ohms, 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 2 Ohm load.

If you lack adequate current, your

music reproduction will be distorted.

Low-level (RCA) input wiring is preferred for best audio performance. Always use

a high-quality RCA cable for best audio performance.

Tri-Mode

RIGHT

Speaker

LEFT

Speaker

To Audio

Outputs of head

unit or signal

processor

amplifier

Low-level (RCA) input wiring is preferred for best audio performance. Always use

a high-quality RCA cable for best audio performance.

To FRONT Audio

Outputs of head

unit or signal

processor

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.

4-Channel Amplifiers

Power and Speaker Wiring

Tri-Mode

CX1800

5-Channel Amplifier

Tri-mode operation allows you to connect this amplifier to a pair of main speakers

plus a subwoofer on one pair of output channels. The main speakers will operate

in STEREO while the subwoofer simultaneously operates in MONO.

To set up the amplifier to run in this mode, put the crossover switches in the FULL

position. Insert high pass filter capacitors and a low pass filter inductor into the

wiring as shown below. Be sure to check the table at the bottom of this page to

determine the correct capacitor and inductor values for the crossover frequency

you wish to achieve.

To SUBWOOFER

Audio Outputs of

head unit or signal

processor (if

present)

CH5

Subwoofer

Tri-Mode

CH4

Speaker

CH3

Speaker

Low-level (RCA) input wiring is preferred for best audio performance. Always use

a high-quality RCA cable for best audio performance.

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.

MonoBlock Amplifier

To Speaker Terminals

of head unit

MonoBlock Amplifier

To Speaker Terminals

of head unit

2Introduction

2What is included?

3Features

3About 2 Ohm operation

4General precautions

4Installation precautions

4 Mounting the amplifier

5 Connecting the amplifier

6Low level input wiring

9High level input wiring

122CH Power and Speaker wiring

2CH and Bridged Modes

132CH Power and Speaker wiring

TriMode

144CH Power and Speaker wiring

4CH and Bridged Modes

154CH Power and Speaker wiring

TriMode

165CH Power and Speaker wiring

5CH Mode

175CH Power and Speaker wiring

Bridged Mode

185CH Power and Speaker wiring

TriMode

19MonoBlock Power

and

Speaker wiring

20Troubleshooting

21Specifications

Congratulations on your

purchase of a

CHAOS EXXTREME 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!

All specifications subject to change without notice.

page

RMS POWER

into 4 Ohms

MAX POWER

into 2 Ohms

BRIDGED POWER

into 4 Ohms

Min. speaker

impedance

THD

Frequency response

Signal-to-noise ratio

Channel separation

Damping factor

Crossover range

low pass

high pass

Bass boost

Fuse rating

Dimensions:

(11

-7/8

" x 2

-5/8

" x ...)

MODEL

4-Cha nnel

MOSFET A mplif ie rs

RMS POWER

into 4 Ohms

MAX POWER

into 2 Ohms

BRIDGED POWER

into 4 Ohms

Min. speaker

impedance

THD

Frequency response

Signal-to-noise ratio

Channel separation

Damping factor

Crossover range

low pass

high pass

Bass boost

Fuse rating

Dimensions:

(11

-7/8

" x 2

-5/8

" x ...)

MODEL

2-Cha nnel MOS FET Am plifiers

5-Cha nnel

MOSFET

Amplif ier

MonoBloc k

MOSFET

Amplif iers

500W x 1

2000W X 1

n/a

2 Ohm Stereo

4 Ohm Mono Bridged

0.01%

9Hz-50kHz

103dB

90dB

125+

35Hz-160Hz

200Hz (fixed)

Variable 0 - +18dB

25A x 2

16-13/16"

CX2000M

200W x 1

600W x 1

SYMPTOM POSSIBLE REMEDY

Two

Channel

Mode

MonoBlock

Mode

Five

Channel

Mode

Bridged

Mode

Connect the Negative (-) terminal of the RIGHT

subwoofer to the CH2 (-) amplifier terminal.

Connect the Positive (+) terminal of the RIGHT

subwoofer to the CH1 (+) amplifier terminal.

Connect the Negative (-) terminal of the LEFT

subwoofer to the CH4 (-) amplifier terminal.

Connect the Positive (+) terminal of the LEFT

subwoofer to the CH3 (+) amplifier terminal.

Component values for

6dB Passive Crossover

FREQUENCY INDUCTOR CAPACITOR

80 Hz

100 Hz

120 Hz

150 Hz

7.5mH

6.5mH

5.5mH

4mH

470uF

330uF

220uF

SPEAKER

IMPEDANCE

8 OHMS

Connect the Positive (+) terminal of the

subwoofer to the L (+) amplifier terminal.

Connect the Negative (-) terminal of the

subwoofer to the R (-) amplifier terminal.

Bridged

Mode

Four

Channel

Mode

Bridged

Mode

Connect the Negative (-) terminal of the RIGHT subwoofer to

the CH2 (-) amplifier terminal.

Connect the Positive (+) terminal of the RIGHT subwoofer to

the CH1 (+) amplifier terminal.

Connect the Negative (-)

terminal of the LEFT

subwoofer to the CH4 (-)

amplifier terminal.

Connect the Positive (+)

terminal of the LEFT

subwoofer to the CH3 (+)

amplifier terminal.

To FRONT Audio Outputs of

head unit or

signal processor

Remote Subwoofer

Level Control

To Audio Outputs of head

unit or

signal processor

To REAR Audio Outputs of

head unit or

signal processor

To Speaker Terminals

of head unit

To Speaker Terminals

of head unit

To Speaker Terminals

of head unit

CH1

Speaker

RIGHT

Subwoofer

SPEAKER

IMPEDANCE

8 OHMS

MINIMUM

SPEAKER

IMPEDANCE

4 OHMS

Low pass

filter inductor

High pass filter

crossover

CH2

Speaker

LEFT

Subwoofer

–

High pass filter

crossover

Low pass

filter inductor

High pass filter

crossover

MINIMUM

SPEAKER

IMPEDANCE

4 OHMS

High pass filter

crossover

To Speaker

Terminals

of head unit

to REMOTE TURN-ON

terminal of head unit

Chassis

ground

point

Battery

FUSE

CH5

Subwoofer

SPEAKER

IMPEDANCE

2-8 OHMS

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