Yamaha NS-A1738 Owners Manual - Page 2

CAUTIONS:

READ

THIS

BEFORE

OPERATING

YOUR

UNIT

•

Please

read

Unpacking

Procedure

first.

•

These

speakers

feature

a

magnetically

shielded

design,

but

there

is

still

a

chance

that

placing

them

too

close

to

a

TV

set

might

impair

the

picture

colors.

Should

this

happen,

place

the

speaker

away

from

the

TV

set.

•

In

order

to

maintain

the

speaker

cabinet's

finish,

prevent

it

from

coming

into

contact

with

water

vapor,

alcohol,

benzene,

insecticide,

etc.

To

clean,

wipe

with

a

dry,

soft

cloth.

•

To

prevent

the

enclosure

from

warping

or

discoloring,

do

not

place

the

speaker

in

places

where

it

will

be

exposed

to

direct

sunlight

or

excessive

humidity.

•

Do

not

place

the

speakers

where

they

are

liable

to

be

knocked

over

or

struck

by

falling

objects.

Stable

placement

will

also

ensure

better

sound

performance.

Please

install

stabilizer

bars.

•

Never

touch

the

speakers

under

the

grille cloth

with

your

hands

or

expose

them

to

excessive

shocks.

If

they

are

dented

or

bent,

the

sound

will

be

distorted

as

well.

•

When

an

amplifier

with

a

rated

output

power

higher than

the

recommended

power

of

the

speaker

system

is

used,

care

should

be

taken

never

to

exceed

the

speaker's

maximum

CONNECTIONS

TO

THE

AMPLIFIER

•

Before

making

connections,

make

sure

that

the

receiver/amplifier

is

switched

off.

•

CONNECTIONS

FOR

SINGLE

PAIR

OF

SPEAKER

CABLES

(WIRES)

Note:

10

feet

of

speaker

cable

is

supplied

for

each

speaker.

However,

for

longer

cable

needs

(up

to

20

feet),

it

is

recommended

to

use

a

minimum

of

14

gauge

high

quality

speaker

cable/wire.

Please

consult

your

retailer

for

your

particular

installation

requirements.

•

Using

speaker

cable,

connect

the

output

terminals

of

the

receiver/amplifier

and

the

input

terminal

of

the

speakers.

•

Connect

the

(+)

terminals

on

both

receiver/amplifier

and

speaker.

Connect

the

(-)

terminals

on

both

receiver/amplifier

and

speaker.

•

Reversing

polarity

(+/-)

will

result

in

unnatural

sound

reproduction.

•

PROCEDURE

1.

Loosen

the

speaker

terminals

by

turning

the

knobs

counterclockwise.

2.

Insert

the

lead

portions

of

the

speaker

cable

into

the

terminal

holes.

3.

Tighten

the

speaker

terminals

by

turning

the

knobs

clockwise.

4.

Lightly

pull

the

speaker

cable

to

make

sure

connections

are

secure.

5.

Repeat

for

all

cables.

(Note:

For

receiver/amplifier

connections,

please

refer

to

the

proper

owners'

manuals.)

Note:

Keep

the

NS

-A1738

gold

plated

jumpers

in

place

and

make

the

connections

on

either

the

top

or

bottom

pair

of

connectors.

Be

sure

the

jumpers

remain

securely

connected

between

the

two

pair

of

binding

posts.

input.

•

Lower

the

power

amplifier/receiver

volume

control

before

changing

input

sources.

Never

change

input

sources

(for

example,

FM

to

CD)

at

high

listening

levels.

Always

turn

the

receiv-

er/amplifier

unit

off

when

installing

or

removing

input

cables.

•

Anytime

you

note

distortion,

reduce

the

volume

control

on

your

power

amplifier/receiver

to

a

lower

setting.

Never

allow

your

power

amplifier

to

be

driven

into

"clipping."

•

Connections

to

the

amplifier

speaker

terminals

depend

on

the

particular

amplifier

you

are

using.

Please

check

the

amplifier's

owner's

manual

before

making

speaker

connections.

•

Before

making

any

connections

to

the

speaker

system

or

amplifier,

make

sure

to

turn

off

the

power

of

the

amplifier

to

avoid

any

damage.

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CONNECTOR

NUTS

GOLD

PLATED

JUMPERS

NOTE.

USE

TOP

OR

BOTTOM

CONNECTORS.

LEAVE

JUMPERS

SECURELY

IN

PLACE

NS

-A

I738011JA

RECEIVER

/AMPLIFIER

BACK

PANEL

TYPE

OF

AMPLIFIER

/

RECEIVER

These

Natural

Sound

Home

Theater

Entertainment

Speakers

are

designed

to

compliment

any

of

Yamaha's

receivers

or

amplifiers.

To

assure

low

distortion

on

program

peaks,

the

amplifier

or

receiver

should

be

capable

of

delivering

at

least

10

watts

(continuous

sine

-wave

power)

per

channel.

These

speakers

can

be

used

safely

with

amplifiers

rated

at

up

to

the

maximum

wattage

shown

in

the

specifications

table.

Amplifiers

rated

at

higher

than

the

recommended

maximum

power

per

channel

may

be

used

with

care.

Program

material

is

not

a

continuous

sine

-wave

input,

and

even

with

a

100

watt

amplifier,

average

levels

will

remain

somewhere

between

1/10

-watt

and

10

watts.

If

you

do

use

a

large

amplifier,

be

careful

never

to

change

input sources

before

reducing

the

volume

level

to

prevent

transients

from

damaging

your

speaker.

II

CONNECTIONS

FOR

BI

-WIRING

(NS

-A1738

ONLY!)

The

NS

-A1738

is

designed

to

work

with

a

single

set

of

speaker

cables,

however

some

may

prefer

to

bi-wire

their

speaker

system.

The

concept

of

bi-wiring

is

that

higher

sonic

performance

is

achieved

by

utilizing

two

sets

of

wires

to

connect

the

mid/hi

frequency

input

(top

connectors)

and

the

other

to

the

low

frequency

input

(bottom

connectors).

Bi

amplification

is

the

use

of

multiple

amps

to

handle

different

fre-

quency

ranges.

To

bi-amp

the

NS

-A1738,

first

remove

the

gold

jumpers

by

loosening

the

con-

nector

nuts

on

the

back

of

the

speaker.

Next,

connect

the

speaker

cables.

Make

sure

that

both

the

red

(+)

mid/hi

input

and

red

(+)

low

frequency

(subwoofer)

input

of

the

left

speaker

are

connected

to

the

red

(+)

terminal

of

the

left

channel

of

your

receiver

and

amplifier

(or

receives

2nd

speaker

input).

Repeat

procedure

for

the

right

channel.

(See

diagram

on

right)

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2.

Yamaha NS-A1738 Owners Manual - Page 2

Cautions, Before, Operating, Connections, Amplifier, Receiver

Page 2 highlights