Sherwood XA-1141 Manuale utente

Sherwood

OPERATION

MANUAL

KA=-1141

4-CHANNEL

AUTO

SOUND

AMPLIFIER

INTRODUCTION

Thank

you

for

choosing

Sherwood

for

your

car

stereo

system.

doing

so,

you

have

opened

the

door

excellence

sound

reproduction.

We,

Sherwood

industries,

have

put

together

state-

of-the-art

circuit

and

component

technology,

along

with

the

best

car

stereo

eprocuenor

equipment

avail-

able

today’s

market.

Properly

installed,

your

Sherwood

product

will

give

you

years

the

sound

quality

you

have

always

wanted

car

stereo.

FEATURES

Your

new

high

fidelity

Power

Amplifier

has

thin

and

flat

design,

accommodate

any

style

floor

mount-

ing.

The

unit

designed

for

negative

ground

power

system.

Feature

highlights

are

follows:

Four

input

channels

(RCA

type)

Four

speaker

input

channels

Adjustable

input

sensitivity

control

for

each

pair

channels

Remote

power

ON/OFF

control

LED

power

indicator

High

convection

heat

sink

design

UNPACKING

AND:

INSTALLATION

Please,

unpack

your

unit

carefully:

eeoninead

‘that’

you

save

the

carton

box

and

packing

material.

They

will

helpful

you

ever

need

move’the

unit

or,

the:

event

you

need

return

service.

Your

unit

comes

with

complete

kit

that

Ineludes

mounting

screws.

Decide

where

you

are

going

install

the

unit.

Refer

Fig.

for

optimum

placement.

Fig.

Mounting

Position

Once

the

proper

location

secured

use

felt

tip

pen

outline

the

holes

drilled

for

mening

(Fig.

2).

Use

3.6mm

diameter

drill

for

the

holes:

Secure

the

unit

the

chassis

using

the

self-

‘tapping

screws.

FOUR

CHANNEL

CONNEC-

TION

SYSTEM

(Fig.

Use

CH1,

CH2,

CH3

and

CH4)

CAUTION:

Before

connecting

any

wire,

TURN

OFF

the

ignition

key

and,

the

power

switch

your

main

cassette

receiver.

Speaker

connections:

(To

See

Fig.

—

Speaker

Connect

the

Green

lead

CH1

the

speaker's

plus

(+)

terminal

and

the

Green/

Black

lead

CH1

the

speaker's

minus

(—)

terminal.

—

Speaker

Connect

the

Gray

lead

CH2

the

speaker's

plus

(+)

terminal

and

the

Gray/Black

lead

CH2

the

speaker's

minus

(—)

terminal.

—

Speaker

Connect

the

Blue

lead

CH3

the

-speaker’s

plus

(+)

terminal

and

the

Blue/Black

lead

CH3

the

speaker's

minus

(—)

terminal.

—

Speaker

Connect

the

Brown

lead

CH4

the

speaker's

plus

(+)

terminal

and

the

Brown/Black

lead

CH4

the

speaker’s

minus

(—)

terminal.

Caution:

not

commonly

ground

the

negative

wires

the

speakers.

This

amplifier

output

has

floating

ground.

For

all

speaker

connections,

make

sure

that

the

phas-

ing

correct.

The

left,

CH1

(or

CH3),

and

right,

CH2.

(or

CH4)

channels

the

amplifier

must

connected

the

proper

speakers.

Furthermore,

all

positive

and

negative

wire

connections

must

maintained.

Reversing

any

these

connec-

tions

will

result

the

speaker

cones

moving

out

phase,

which

causes

bass

cancellation.

Speaker

input

connections:

your

cassette

receiver

has

BTL

outputs,

connect

the

output

lead

the

receiver

the

speaker

input

located

the

front

panel

amplifier.

—

Connect

the

Green

lead

CH1

(+)

the

front

(+)

and

the

Green/Black

lead

CH1

(—)

the

front

(—)

the

receiver.

—

Connect

the

Gray

lead

CH2

(+)

the

front

(+)

and

the

Gray/Black

lead

CH2

(—)

the

front

(—)

the

receiver.

—

Connect

the

Blue

lead

CH3

(+)

the

rear

(+)

and

the

Blue/Black

lead

CH3

(—)

the

rear

(—)

the

receiver.

—

Connect

the

Brown

lead

CH4

(+)

the

rear

(+)

and

the

Brown/Black

lead

CH4

(—)

the

rear

(—)

the

receiver.

—

Connect

Black

lead

the

amplifier

the

chas-

sis

ground

the

receiver.

Power

supply

connections:

—

Secure

the

BLACK

WIRE

(Ground)

the

chas-

sis

using

screw

already

attached

the

chas-

sis

the

car.

screw

not

available

near

your

amplifier,

drill

3.6mm

diameter

hole

the

chassis

the

car

and

secure

the

ground

lead

using

the

self-tapping

screw

provided

with

the

unit.

—

Connect

the

RED

WIRE

(Battery

directly

the

positive

lead

the

battery.

not

connect

the

ignition

key

controlled

positive

lead.

—

Connect

the

YELLOW

WIRE

(Remote

ON/OFF)

the

remote

power

control.

lead

(or

power

antenna

control

lead)

your

main

cassette

receiver.

this

case,

the

power

the

unit

will

automatically

controlled

the

power

switch

your

main

cassette

receiver.

FRONT

PANEL

CONTROLS

Line

input

—

Connect

the

preamplifier

jacks

your

cas-

sette

receiver

and/or

equalizer

these

input.

See

the

speaker

connections

for

details.

Adjustable

Input

Level

Sensitivity

Control!

—

These

controls

located

bottom

allow

you

individually

adjust

each

channel's

input

level

sen-

sitivity

from

200mV

(mark:

‘H’)

(mark:

‘L’).

You

can

now

perfectly

match

your

amplifier

system

with

any

component

your

choice

—

cassette

players,

tuners,

receiver,

CDP,

etc.

Speaker

input

—

your

cassette

receiver

does

not

have

RCA

jacks,

connect

the

speaker

outputs

your

receiver

the

speaker

input

the

amplifier.

You

can

adjust

the

input

level

sensitivity

from

5V.

Caution

not

use

both

line

inputs

and

speaker

inputs

sil:

taneously.

REAR

PANEL

CONTROL

Speaker

Connections

—

See

the

speaker

connec-

tion

section

for

details.

(Fig.

3-1)

(@)

Power

Supply

Connection

(Red)

—

Connect

the

battery

B+

(12V).

Chassis

Ground

Connection

(Black)

—

Connect

the

metal

part

your

car

chassis.

Remote

Control

Connection

(Yellow)

—

Connect

the

remote

control

car

receiver..

The

1141

will

turn

on/off

automatically

with

your

car

stereo

receiver.

Power

Indicator

—

Lights

when

‘the

unit

operation.

REAR

SIDE

Remote

On/Off

Yellow

SHIELD

RED

CABLE

nent

FUSE

10A

Green/Black

—

]

—

Front

Gray/Black

—

Jace

Gray

Omm

SLACK

Blue

12V

;

aal|

ipo

Blue/Black

—

CHASSIS

Rear

GROUND

WITT

Brown/Black

CHASSIS

GROUND

bie

RCH

Brown

INSTALLATION

PROCEDURE

BLACK

WIRE

THE

CHASSIS

GROUND

metal

car)

RED

WIRE

THE

BATTERY

B+

YELLOW

WIRE

—

THE

CAR

RECEIVER

REMOTE

WIRE.

Fig.

3-1.

Line

Input

Connection

REAR

SIDE

RECEIVER

RED

FUSE

10A

[1]

‘12

Battery

CHASSIS

GROUND

RECEIVER

Blue/Black

Brown/

Black

CHASSIS

GROUND

INSTALLATION

PROCEDURE

BLACK

WIRE

THE

CHASSIS

GROUND

metal

car)

RED

WIRE

THE

BATTERY

B+

YELLOW

WIRE

THE

CAR

RECEIVER

REMOTE

WIRE.

Fig.

3-2.

Speaker

Input

Connection

SPECIFICATION

(

AMPLIFIER

SECTION

AVERAGE

POWER

OUTPUT/CH

INTO

OHMS

20Hz-20KHz,

0.5%

THD

TKHz,

10%

THD

COW

FREQUENCY

RESPONSE

(

—

3dB)16Hz~37KHz

SIGNAL

NOISE

RATIO

(IHF

90dB

OINPUT

SENSITIVITY/into

10k

ohms

load

impedance

RANG

DOV

LOW

SPEAKER

INPUT

SENSITIVITY

HIGH

LOW

DAMPING

FACTOR

GENERAL

OPERATING

VOLTAGE.

——s«éDC.:

14.4

(10.8V~15.6V

allowable

range)

SPEAKER

IMPEDANCE

____.

Minimum

ohms

OFUSES_._

COAX,

Ncormaall

Blow

DIMENSION,

W____

165mm

(61)

37mm

(123%)

230mm

(94,6)

NET

WEIGHT

1.4Kg

(3.1

Ib)

NOTE:

Specification

design

are

subject

change

without

notice

for

improvements.

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