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JMNLPINE.

cic

MANUAL

Bridgeable

Power

Amplifier

SOEARRES|

2

_

E

ea

ve

peat

3522S

|

Contents

Specifications

2/5

eis

s

ok

aus

wire

pede

aes

po

Oe

Wa

oa

OB

SHE

Ee

eee

oe

det

tesantien

Mat

Md

Mabk

eed

O80

Be

ec

eensee

3

FOOT

OS?

xc.

Sse

Br

a

Suda

sees

pate

Ses

oa

eee

Tate

dei

Son

GGUS

arte

ae

te

aac

ata

heat

ae

eves

at

tte

ea

ace

eich

Bienen

tear

ah

ate

nae

aeons

we

4to5

Switches

and

TerminalS

icc...

oss

asad

eeced

dwearee

Biwi

a

de

adie

a

hep

pre

re

Pee

hands

2b

Mie

GRAMS

ye

Sealed

Eee

6

Connections

...........

ese

ert

eibathe

Seats

pants

Ue

te

ateet

taelnad

ee

aaa

da

sees

Son

rae

el

Ee

6

to

9

SWitch

SettingS.4.i3-.2

inhi

tee

ae

eee

Nhe

a

teed

tga

a

eee

rardan

tee

eauntiged

4

hele

aageeieg

9

to

10

Characteristic

Curves:

aicacs

ae

ine

ca

ke

ee

ie

he

area

ted

Siel

neo

RR

Ne

Stee

aa ae

a

aa

a

we

a

id

ne

ee

ee

ed

11

eR

De

2

ERD

AMC

eee

Poa

thuttah

tre

eatin

Cepek

ctekca

Net

ene

ata

cater

yc

ts

Wien

u

tem

oa

Rice

12

Me

Ii

arnt

ede

eiecin

args

Eeranih

sud

Oe

ix

A

9b

SGN

BS

Had

BI

IRGS

ine

RA

ae

Maton

eae

WN

Te

Ge

also

aa

5

12

Pe

EVD

FAD

co

slips

woh

o

Melee

ge

ORES

deta

ete

We

dine

Cease

Menge

ewaaleer

ude

ts

LINE

grees

ees

13

TN

fateh

cae

Rieti

aU

nts

lata

Gla

ttde

Nita

cette

tel

Ooo

aa!

ote

ils

fare

hed

Ata

gat

nen

tat

A

nid

a

ded

ala

14

Pel

E

oe

sp

oeln

oe

ee

asize

At

eee

ath

atid

caclceaksed

aid

ta

Ue

dtnih

am

tah tate

ok

Wi

DU

ti

ela

alta

cae

15

NPS

es

Nc

Sehr

tah

knelate

gi

dished

es

dicta

fee

eee

we

se

We

eed

htaks

nacicna

ee

emcee

ete

Lace

15

Block:

Diagram:

<scavcwakmekt

Geek

i

eta

wept

ee

eee

oleae

tee

bP ea

Sig dee

Bat

Pasha

ae

ees

ah

ereow

Vinee

Grated

aca

Reha

17

Parts

Layout

on

P.C.

Boards

and

Wiring

Diagram

.....

6...

nett

ete

19

to

21

Schematic

Diagrams

vasa

Mae

wee

eee

a

tee

ee

oe

he

ye

Gea

eoces

hn

8

54

Ga

ee

oe

pI

aed

22

to

24

Electrical-Parts:

List’

264

¢

soe

we

oS

Rete

we

San

ue

eae

Mae

Gh

ed

ee

AAS

wae

aie

eh

a

eae

25

to

27

Cabinet

Assembly

Parts

List

2...

0...

ec

ec

eee

ee

ene

een

ene

e

ete

eens

28

Exploded

View

(Cabinet)

2.0.0.0...

cc

ccc

ccc

cece

ee

eee

e

eee

eee

e

tenn

eee

e

bette

eee

e

nes

29

to

30

Packing

Assembly

Parts

List...

6...

ccc

eee

eee

eee

eee

nen

ees

31

Packing

Method

View

..........

cece

ccc

cece

cece

eee

eee

ne

ee

nett

eaten

tee

e

ene

enna

eens

tetnees

31

Semi-Conductor

Lead

Identifications

.....

0...

een

ent

eee

e

nee

nnn

ee

ere

32

Additional

Schematic

Diagram

Inserted.

ei

te

tt

tt

‘

1

t

sl

:

f

4

|

3522S

Specifications

POWErSOULCE

diciie

sidcers,

Sodas

Raeeho

te

NEG

Sis

SP

ORNS

SoS

Aree

OE

RISES

OE

ES

Dao

R a

atiate

Sana

gia

eA

Eggs

FS.

ase

14.4V

DC

POWEr

OQULPULS

Sedce

cagteua

eae

ce

ook

ne

sbae

niin

ee

etataa

eee

ee

gees

4

ohm

2-Channel

(at

0.08%

T.H.D.)

:

25W/ch

(at

10%

T.H.D.):

35W/ch

2

ohm

2-Channel

(at

0.8%

T.H.D.)

:

30W/ch

(at

10%

T.H.D.)

:

40W/ch

4

ohm

BTL

mode

(at

0.8%

T.H.D.)

:

65W/ch

Input

Sensitivity

(at

30W/ch

Output)

...

20.0...

teen

nents

Speaker

Input

:

2V+2dB

RCA

Input

:

0.5V+2dB

Input

IMpEdaNnce:

sscscudeee

awe

dd

ahee

ob

velar

ete

eek

See

Oe

edi

alle

te

Pea

daida

eeeWae

rae

eee

eae

10£2k

ohm

Frequency

Range

(at

1KHZ41dB)

2.0.0...

ccc

eee

eee

ene

nett

eer

eee

nent

eben

ences

20Hz~40kHz

Channel

Separation

(Input

shorted,

at

D2)

oc

siete

deeds

hen

ea

oon

te

a

be

tainhcem

aa

dts

nda

eeus

55dB

S/N

Ratio

(Output

30W/ch,

Input

shorted)

00.0.6.

nnn

tte

tne

e

een

enn

tees

90dB

Residual

Noise

(Input

shorted,

4

ohm

2-channel)

.......

0.0

cece

cence

eee

eee

ene

eee

e

nee

1.2mV

Current:

Drain:

(at:

10%

TeHi

Dd!

s.2

52h

cata

enks

CAS

bin

ele

Heese

Sete

te

eae

RiwE

eee

Re

Ne

ee

4

ohm

2-Channel:

15A

2

ohm

2-Channel

:

20A

FUSE.

028

edict

dale

phcae

ad

Satin

anes

tet

ei

Gies

ele

eons

len

ea

ho

ndeck,

be

he

awtne

duals

gdlea

TRL

Rah

G

oF

15A

(Battery)

SEMICONAUCOMS:

cs:nc

er

ensetekstane

de

th

men

a

seed

cae

aw

eo

8IC’s,

25

Transistors,

2

FET’s,

13

Diodes,

4

Zener

Diodes

Dimensions:

(WICH

XD)

iccic.

8

cecscttee

Gbeacdes

Ha

Sats

ta

Roeede

de

Rho

tae

ch

ena

bee

Pea

a

Rigiee

tees

dau

Sauk

ete

22030

130mm

Weight):

s.ever

as

eaiie

oB

hea

ncigh

Abs

seen

ute

Pe

gine

dada

ting

ch

Rae

Cate

oadige

Rae

ete

Cae

E

dasa

gS

1.22kg

Note

:

Due

to

continuing

product

improvement,

specifications

and

design

are

subject

to

change

without

notice.

FEATURES

|

2/1

CHANNEL

OPERATION

The

3522S

can

be

used

as:

a.

2-channel

amplifier,

producing

30W

per

channel

into

4

Q,

or

40W

per

channel

into

2

Q.

b.

1-channel

amplifier,

producing

80

W

per

channel

into

4

Q.

MULTIMODE

CAPABILITY

Multimode

capability

allows

the

3522S

to

operate

in

its

2-channel

stereo,

and

bridged

mono

modes

simultaneously.

This-way,

the

amplifier

can

power

a

pair

of

satellite

speakers,

along

with

a

bridged

mono

subwoofer,

and/or

a

true

center

channel

speaker.

3,

2,

OR

1

CHANNEL

OPERATION

Thanks

to

its

Multimode

capability,

the

3522S

can

simultaneously

drive

a

pair

of

satellite

speakers

in

stereo,

along

with

a

bridged

mono

subwoofer

(and/or

center

channel

speaker)

for

a

total

of

3

channels.

In

addition

to

Multimode,

the

3522S

can

be

driven

in

a

conventional

2-channel

mode,

or

its

two

channels

can

be

bridged

into

a

single

channel

of

considerably

higher

power

output.

ACTIVE

DIVIDING

NETWORK

A

built-in,

switchable

electronic

crossover

network

at

80

Hz,

18

dB

per

octave,

can

be

used

to

set

up

the

amplifier

for

low-pass

(subwoofer)

or

high-pass

(tweeter/midrange

satellite)

applications.

This

network

can

also

be

switched

off

to

allow

full-range

signal

amplification.

DUO-B

FEEDBACK

CIRCUITRY

This

stabilizes

the

amplifier,

removes

DC

offset,

and

offers

excellent

total

harmonic

distortion

(T.H.D.)

characteristics.

It

also

provides

low

T.1.M.,

excellent

slew

factor,

stability,

and

musicality.

NO

CURRENT

LIMITING

Absence

of

current

limiters

in

the

audio

section

ensures

low

T.1.M.,

excellent

transient

response,

and

superb

sonic

quality.

S.T.A.R.

CIRCUITRY

The

Alpine-developed

Signal

Transit

for

Accurate

Response

circuit

topology

improves

sonic

properties

by

reducing

interaction

between

different

sections

of

the

circuitry.

INPUT

MODE

SELECTOR

This

switch

allows

the

user

to

specify

the

input

signal

entering

the

ampli-

fier.

Among

other

benefits,

it

eliminates

the

need

for

RCA-type

Y-

adaptors

when

bridging

the

amplifier.

DC-TO-DC

SWITCHING

MODE

POWER

SUPPLY

Provides

excellent

power

output

throughout

the

audio

bandwidth

20

Hz

to

20

kHz.

Its

soft

clipping

characteristics

ensure

superb

transient

response

and

musicality.

EXTRA

HEAVY

DUTY

CONSTRUCTION

SPEAKER

LEVEL

INPUT

CAPABILITY

FULLY

DISCRETE,

COMPLEMENTARY

OUTPUT

CIRCUITRY

GOLD-PLATED,

SCREW-DOWN

POWER

AND

SPEAKER

TERMINALS

INDEPENDENT,

CONTINUOUSLY

ADJUSTABLE

GAIN

CONTROL

HIGH

PERFORMANCE,

LOW

NOISE,

AUDIOPHILE

QUALITY

ACTIVE

AND

PASSIVE

COMPONENTS

VOLTAGE

REGULATED/FILTERED

INPUT

STAGES

GOLD-PLATED

RCA

INPUT

CONNECTORS

THIRD-ORDER,

(18

dB

PER

OCTAVE)

CAPACITIVE/INDUCTIVE

POWER

SUPPLY

INPUT

AND

OUTPUT

FILTERING

STATUS

MONITOR

This

indicator

illuminates

in

green

when

the

amplifier

is

on

and

opera-

tional.

This

light

will

turn

orange

if

any

internal

protection

circuitry

is

activated.

in

case

of

an

installation

problem,

the

STATUS

MONITOR

can

aid

jn

troubleshooting

the

system.

SWITCHES

AND

TERMINALS

BPBSOQOQLVOOHOHO

Status

Monitor

Input

Gain

Adjustment

Control

Active

Dividing

Network

Mode

Selector

Switch

Input

Mode

Selector

Switch

RCA

Input

Connectors

Speaker

Input

Connector

Speaker

Output

Terminals

Fuse

(15A)

Battery

Lead

Terminal

Remote

Turn-On

Lead

Terminal

Ground

Lead

Terminal

(ofo)

Neg

ates

Before

making

connections,

be

sure

to

turn

the

power

off

to

all

audio

components.

Insulation

tubes

for

the

speaker

terminals

and

the

power

supply

terminals

are

supplied

with

the

3522S.

Make

sure

the

speaker

leads

and

power

supply

leads

are

routed

through

these

tubes

separately

before

making

final

connections.

CAUTION:

Always

keep

the

RCA

inputs

of

the

3522S

connected

to

a

signal

source

while

the

amplifier

is

in

operation.

@

Speaker

Output

Terminals

The

3522S

has

a

set

of

speaker

outputs.

Be

sure

to

observe

correct

speaker

output

polarity

and

phasing.

In

the

stereo

mode,

connect

the

left

and

right

speaker

outputs

to

their

respective

speakers.

Connect

the

positive

output

to

the

positive

speaker

terminal

and

the

negative

to

negative.

In

the

bridged

mode,

the

left

positive

output

is

connected

to

the

positive

terminal

of

the

speaker

and

the

right-negative

output

is

con-

nected

to

the

negative

terminal

of

the

speaker.

Do

not

use

the

negative

(-)

speaker

output

as

a

common

output

for

left

and

right

speakers.

Do

not

connect

the

speaker

outputs

to

the

vehicle's

chassis.

CAUTION:

Do

not

connect

speaker

leads

together

or

to

chassis

ground.

@

Speaker

Input

Leads

These

leads

are

input

leads

for

use

with

head

units

not

equipped

with

preamp

outputs.

When

not

using

the

RCA

Line

Input

connectors,

you

should

connect

these

wires

to

the

speaker

output

leads

of

your

head

unit.

The

3522S

accepts

input

from

high

power

or

standard

power

head

units.

®

RCA

input

Connectors

Connect

these

connectors

to

the

line

out

leads

on

your

head

unit

using

RCA

extension

cables

(sold

separately).

Be

sure

to

observe

correct

channel

connections;

Left

to

Left

and

Right

to

Right,

Front

to-Front

and

Rear

to

Rear.

@

Battery

Lead

(Yellow)

Connect

this

lead

directly

to

the

positive

(+)

terminal

of

the

vehicle's

battery.

Do

not

connect

this

lead

to

wiring

in

the

vehicle's

electrical

system.

Be

sure

to

add

a

25A

in-line

fuse

amp

as

close

as

possible

to

the

battery's

positive

(+)

terminal.

This

fuse

will

protect

your

vehicle's

electri-

cal

system

in

case

of

a

short

circuit.

If

you

need

to

extend

this

lead,

the

wire

gauge

should

be

10

AWG

or

larger.

.

SWITCHES

AND

TERMINALS

OO®d

®

cee

a.

©

O¢

0

»

[tet

Tel

et

teal]

|

(etal

s——

©

aes

@

os

?

oa

=

=

PSBOSOOPOOHHOHO

MUNPINE

as2zs,

FOE

ABLE

POWER

ane

CR

SO

©

©

i

egestas

al

Ea

ea

Ee

Maniyaaiiaainl

O

Status

Monitor

Input

Gain

Adjustment

Control

Active

Dividing

Network

Mode

Selector

Switch

Input

Mode

Selector

Switch

RCA

input

Connectors

Speaker

Input

Connector

Speaker

Output

Terminals

Fuse

(15A)

Battery

Lead

Terminal

Remote

Turn-On

Lead

Terminal

Ground

Lead

Terminal

CONNECTIONS

Before

making

connections,

be

sure

to

turn

the

power

off

to

all

audio

components.

Insulation

tubes

for

the

speaker

terminals

and

the

power

supply

terminals

are

supplied

with

the

3522S.

Make

sure

the

speaker

leads

and

power

supply

leads

are

routed

through

these

tubes

separately

before

making

final

connections.

CAUTION:

Always

keep

the

RCA

inputs

of

the

3522S

connected

to

a

signal

source

while

the

amplifier

is

in

operation.

@

Speaker

Output

Terminals

The

3522S

has

a

set

of

speaker

outputs.

Be

sure

to

observe

correct

speaker

output

polarity

and

phasing.

In

the

stereo

mode,

connect

the

left

and

right

speaker

outputs

to

their

respective

speakers.

Connect

the

positive

output

to

the

positive

speaker

terminal

and

the

negative

to

negative.

In

the

bridged

mode,

the

left

positive

output

is

connected

to

the

positive

terminal

of

the

speaker

and

the

right-negative

output

is

con-

nected

to

the

negative

terminal

of

the

speaker.

Do

not

use

the

negative

(~)

speaker

output

as

a

common

output

for

left

and

right

speakers.

Do

not

connect

the

speaker

outputs

to

the

vehicle's

chassis.

CAUTION:

Do

not

connect

speaker

leads

together

or

to

chassis

soured

@

Speaker

Input

Leads

These

leads

are

input

leads

for

use

with

head

units

not

equipped

with

preamp

outputs.

When

not

using

the

RCA

Line

Input

connectors,

you

should

connect

these

wires

to

the

speaker

output

leads

of

your

head

unit.

The

3522S

accepts

input

from

high

power

or

standard

power

head

units.

@

RCA

Input

Connectors

Connect

these

connectors

to

the

line

will

leads

on

your

head

unit

using

RCA

extension

cables

(sold

separately).

Be

sure

to

observe

correct

channel

connections;

Left

to

Left

and

Right

to

Right,

Front

to

Front

and

Rear

to

Rear.

@

Battery

Lead

(Yellow)

Connect

this

lead

directly

to

the

positive

(+)

terminal

of

the

vehicle's

battery.

Do

not

connect

this

lead

to

wiring

in

the

vehicle's

electrical

system.

Be

sure

to

add

a

25A

in-line

fuse

amp

as

close

as

possible

to

the

battery's

positive

(+)

terminal.

This

fuse

will

protect

your

vehicle's

electri-

cal

system

in

case

of

a

short

circuit.

If

you

need

to

extend

this

lead,

the

wire

gauge

should

be

10

AWG

or

larger.

CONNECTIONS

©

RCA

Input

Connectors

Let

©

(White)

Speaker

©

(White/Black)

Right

©

(Gray)

Speaker

@

Speaker

Input

Leads

©

(Gray/Black)

@

Battery

Lead

(Yellow)

©

Remote

Turn-On

Lead

(Blue/White)

©

Ground

Lead

(Black)

©

Remote

Turn-On

Lead

(Blue/White)

Connect

this

lead

to

the

remote

turn-on

or

power

antenna

(positive

trigger,

(+)

12V

only)

lead

of

your

head

unit.

@

Ground

Lead

(Black)

Connect

this

lead

to

a

clean,

bare

metal

spot

on

the

vehicle's

chassis.

Verify

this

point

to

be

a

true

ground

by

checking

for

continuity

between

that

point

and

the

negative

(—)

terminal

of

the

vehicle's

battery.

Ground

all

your

audio

components

to

the

same

point

on

the

chassis

to

prevent

ground

loops.

@

Insulation

Tube

Use

these

tubes

to

cover

the

power

and

speaker

terminals

after

connec-

tions

have

been

made.

This

will

prevent

inadvertent

shorting

of

the

terminals.

@

insulation

Tube

SEH

|

3522S

ST

TYRES

AE

OS

RRCAESSP

i

i

i

i

i

i

i

a

i

'

i]

é

i

IE

EME

YO

SES

I

TPES

OCI

IEE

SSE

PACT

LESS

POSER

STS

‘-rcunarmcmntrntntat

més

rR

IR

PHEASANTS

i

CORPO

3522S

|

“2.

CONNECTIONS

Please

check

your

head

unit

for

the

conditions

listed

below:

a.

The

head

unit

does

not

have

a

remote

turn-on

or

power

antenna

lead.

b.

The

head

unit's

power

antenna

lead

is

activated

only

when

the

radio

is

on

(turns

off

in

the

tape

or

CD

Mode).

.

The

head

unit's

power

antenna

lead

is

logic

level

output

(4)

5V,

negative

trigger

(grounding

type),

or

cannot

sustain

(+)

12V

when

connected

to

other

equipment

in

addition

to

the

vehicle’s

power

antenna.

If

any

of

the

above

conditions

exist,

the

remote

turn-on

lead

of

your

3522S

must

be

connected

to

a

switched

power

source

(igni-

tion)

in

the

vehicle.

Be

sure

to

use

a

3A

fuse

as

close

as

possible

to

this

ignition

tap.

Using

this

connection

method,

the

3522S

will

turn

on

and

stay

on

as

long

as

the

ignition

switch

is

on.

*

If

this

is

objectionable,

an

SPST

(Single

Pole,

Single

Throw)

switch,

in

addition

to.the

3A

fuse

mentioned

above,

may

be

installed

in-line

on

the

35225

turn-on

lead.

This

switch

will

then

be

used

to

turn

on

(and

off)

the

3522S.

Therefore,

the

switch

should

be

mounted

so

that

it

is

accessible

by

the

driver.

Make

sure

the

switch

is

turned

off

when

the

vehicle

is

not

running.

Otherwise,

if

the

amplifier

is

left

on

for

an

extended

period

of

time,

the

car's

battery

may

be

drained.

eed

(Blue/White)

ruse

(24)

ignition

|

l

Source

Power

|

As

close

as

ev

Antenna

SPST

Switch

eee

is

tional)

yee

(op

ignition

tap

Remote

On

To

other

Alpine

components’

Remote

On

leads

“CONNECTIONS.

2-Channel

Stereo

System

(Full

Range,

Tweeter/Midrange

Satellite,

or

Subwoofer)

Position

of

the

Position

of

the

input

Filter

Switch:

Mode

Selector

Switch:

@

Full

Range

®©

Tweeter/Midrange

Satellite

(MONO)

ST

CHi)+@)

@

Subwoofer

Position

of

the

*

Position

of

the

Input

Filter

Switch:

Mode

Selector

Switch:

CHO}MONO)

ST

CHG)-(2)

Single

Channel

System

(Full

Range,

Midrange

Satellite)

Position

of

the

*

Position

of

the

Input

Filter

Switch:

Mode

Selector

Switch:

1(MONO)

@

Full

Range

[a_]

ra]!

ease

|

CHOKMONO)

st

cHO}E

@

Midrange

Satellite

CHOMONO)

ST

CHOM+2)

|

3522S

3522S

|

Input

Mode

Selector

Switch

a)

Select

the

“ST”

position

(center)

when

the

Left

(CH

1)

and

Right

|

channels

are

used

in

stereo.

es

CH{T}(MONO)

ST

CH{[i]+

b)

Select

the

“{1]

(MONO)”

position

when

only

one

channel

(Left

or

will

be

used

for

both

outputs

of

a

stereo

system

or

the

mono

out

bridged

system.

1

CH[I}(MONO)

ST

CHE)

+[2]

c)

Select

the

‘[1]

+

[2]”

position

when

the

Left

(CH

1)

and

Right

(Cr

channels

will

be

summed

for

a

subwoofer

system.

-T

CH[i](MONO)

ST

CHE)+E2]

Input

Gain

Adjustment

Control

After

setting

your

head

unit's

volume

control

1/4

of

a

turn

down

f

maximum

output

level,

rotate

the

Input

Gain

Adjustment

Control

wit

flat

blade

screwdriver

and

adjust

the

input

gain

to

the

point

where

tt

maximum

volume

with

no

distortion.

2-Channel

Stereo

System

(Full

Range,

Tweeter/Midrange

Satellite,

or

Subwoofer)

Position

of

the

Position

of

the

Input

Filter

Switch:

Mode

Selector

Switch:

@

Full

Range

®

Tweeter/Midrange

ST

Satellite

CH(](MONO)

ST

CHL]

®

Subwoofer

‘

Position

of

the

*

Position

of

the

Input

Filter

Switch:

Mode

Selector

Switch:

Subwoofer

Single

Channel

System

(Full

Range,

Midrange

Satellite)

Position

of

the

*

Position

of

the

input

Filter

Switch:

Mode

Selector

Switch:

1(MONO)

ayes

CHE(MONO)

ST

CHO]

ations

‘dr

:

®

Midrange

Satellite

aah

fe

ag

lf

eS

OFF

HP

uP

CHE(MONO)

ST

CHE}

@®

Full

Range

|

35228

=

3352.28

|

SWITCH

SETTINGS

~—

Input

Mode

Selector

Switch

a)

Select

the

“ST”

position

(center)

when

the

Left

(CH

1)

and

Right

(CH

2)

channels

are

used

in

stereo.

el

ie

CH

[i]

(MONO)

ST

CHE}

+2]

b)

Select

the

“{1]

(MONO)”

position

when

only

one

channel

(Left

or

Right)

will

be

used

for

both

outputs

of

a

stereo

system

or

the

mono

output

of

a

bridged

system.

To

CH[T](MONO)

ST

CH[i]+2]

c)

Select

the

‘{1]

+

[2]”

position

when

the

Left

(CH

1)

and

Right

(CH

2)

-

channels

will

be

summed

for

a

subwoofer

system.

{

-—

|

—

CH(AJ(MONO)

ST

CH{t]+{2]

Input

Gain

Adjustment

Control

After

setting

your

head

unit's

volume

control

1/4

of

a

turn

down

from

the

maximum

output

level,

rotate

the

Input

Gain

Adjustment

Control

with

a

#0

flat

blade

screwdriver

and

adjust

the

input

gain

to

the

point

where

there

is

maximum

volume

with

no

distortion.

"SWITCH

SETTINGS

Active

Dividing

Network

Mode

Selector

Switch

a)

Select

the

“LP”

position

when

the

amplifier

is

used

for

the

low-pass

(subwoofer)

system.

The

frequencies

higher

than

80

Hz

will

be

cut

(ata

rate

of

18

dB

per

octave).

a

OFF

HP

LP

b)

Select

the

“HP”

position

when

the

3522S

is

used

for

the

high-pass

(tweeter/midrange)

system.

The

frequencies

lower

than

80

Hz

will

be

cut

(at a

rate

of

18

dB

per

octave).

L—

PLP

L

+

mm

OF

c)

Select

the

“OFF”

position

when

the

3522S

is

used

for

the

regular

stereo.

system

with

full-range

speakers.

The

full

bandwidth

will

be

output

without

cutting

the

high

or

low

frequencies

eee

3

OFF

HP

LP

Status

Monitor

This

indicator

lights

in

green

when

the

power

is

on.

The

3522S

has

built-

in

protection

circuitry.

If,

for

some

reason,

this

protection

circuit

is

activated,

the

indicator

turns

orange.

If

this

happens,

turn

the

system

off,

find

the

cause

of

the

problem

and

remedy

the

situation.

This

includes

checking

all

your

connections

and

wiring.

If

the

indicator

remains

Orange

when

the

system

is

turned

on,

consult

your

authorized

Alpine

dealer.

NOTE:

The

indicator

will

illuminate

in

orange

for

a

few

seconds

when

the

power

is

turned

on

as

the

turn

on

muting

circuit

is

activated.

This

is

normal.

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