Bose 201 Series II Loud Owner's guide - Page 3

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•

•

\\\)

I-3

feet

(30-90

cm)

(.7)

CEILING

1

Minimum

18

inches

(45

cm)

Left

Speak.

3.12

leer

10.9.3.6

m)

BACK

WALL

Minimum

18

smiles

(45cm)

Righ

Speaker

FLOOR

a

FIGURE

3.

RieGf

offil(kffifltafnen!

n

average-siax1

hslervng

rOOMR

(45.00

cm).

Large

objects

(furniture.

etc.)

should

not

be

placed

in

front

or

to

the

far

sides

(the

lar

side

of

each

speaker

is

the

side

furthest

away

from

the

other

speaker)

of

the speakers.

NOTE:

A

large

portion

of

the

sound

energy

radiated

by

your

201

Series

II

system

comes

through

the

far

sides

of

the

speakers.

For

this

reason,

it

is

important

not

to

block

or

cover

the

far

-side

grille

panels.

Always

try

to

allow

at

least

12

inches

(30

cm)

of

clear

space

to the

outsides

of

the

speaker

cabinets.

In

addition.

place

your

speakers

so

that

the

fronts

and

far

sides

are

at

least

two

feet

from

any

absorbent

furnishings

(stuffed

chairs,

heavy

drapes,

etc.)

which

can

soak

up

high

-frequency

sound.

It

is

not

always

possible

to

follow

placement

direc-

tions

exactly.

If

your

listening

area

necessitates

a

compromise

in

speaker

placement.

make

your

first

priority

the

maintenance

of

proper

distance

between

the

speakers

and

side

walls.

This

will

maximize

per-

formance

in

your

listening

area.

B.

Room

Acoustics

I

Your

Bose'

201

4

Series

II

system

performs

best

when

sound

energy

G

given

room

to

develop

"around"

the

speakers,

reflecting

off

nearby

walls.

The

speakers

will

sound

best

when

they

are

posi-

tioned

to

reflect

off

hard

surfaces

such

as

wood,

brick.

glass,

plasterboard.

and/or

sturdy

paneling.

2.

Your

201

Series

II

speakers

are

designed

to

provide

optimum

sound

reproduction

when

placed

in

a

room

with

an

average

amount

of

sound

-absorbent

furnishings

(Cc

-

UP/Ming,

wall

hangings,

and

drapes).

If

your

room

contains

few

furnishings

and

has

bare

walls

and

floor,

the

music

may

sound

unnaturally

shrill

or

bright.

A

slight

decrease

in

treble

(use

the

control

on

your

amplifier

or

receiver)

should

improve

the

sound.

3.

II

your

listening

room

contains

more

absorbent

fur-

nishings

than

normal

(stuffed

furniture.

unusually

heavy

carpeting,

or

many

drapes).

Ihe

music

may

sound

dull

and

lifeless.

A

slight

increase

in

treble

(again

using

the

control

on

your

amplifier

or

receiver)

should

improve

the sound.

4.

If

your

music

seems

to

be

lacking

in

bass.

improve-

ment

can

usually

be

heard

by

moving

toe

speakers

closer

to

the

wall

behind

them

and/or

nearer

to the

corners

of

your

listening

room.

Heavy

"booming"

bass

can

be

tamed

by

moving

the

speakers

away

from

walls.

If

moving

the

speakers

is

not

feasible,

a

slight

increase

or

decrease

in

bass

(using

the

control

on

your

amplifier

or

receiver)

should

improve

the

sound.

Inadequate

bass

response

can

also

be

caused

by

improper

speaker

phasing.

Section

5.

Phasing

Test,

gives

details

on

proper

phasing.

4.

Wire

Selection

If

the

wire

used

to

connect

your

speakers

to

your

amplifier

or

receiver

is

too

small.

audible

coloration

of

the

sound

and

power

loss

can

occur.

The

accompanying

table

spe-

cifies

the

minimum

thickness

of

aconductor

wire

recorn.

mended

for

various

speaker

-to

-amp

distances.

Standard

2

-conductor

apcord

(common

lamp

cord)

can

be

used

for

speaker

connection.

This

wire

is

often

color

coded.

or

has

a

ribbed

line

or

lines

running

along

one

conductor

for

easy

identification

of

trio

pentive

and

negative

leads.

NOTE

ON

WIRE

SIZES:

As

the

gauge

number

of

a

wire

gets

smaller,

the

wire

itself

gets

larger.

For

in-

stance.

when

a

mnimum

gauge

of

18

is

suggested,

an

acceptable

substitute

s

16

gauge.

not

20

gauge.

RECOMMENDED

WIRE

SIZES*

Maximum

Length

30

feet

(9

m)

Wire

Gauge

18

(.75

rum)

45

feet

(14

m)

16(1.5mm-)

70

led

(21

m)

14(20P1151)

Llt.

ff:cler

(pe

f

3ytlb

5.

Phasing

Test

If

you

are

not

certain

that

the

speakers

are

connected

to

your

amplifier

"In

phasv:

-

i.e..

positive

to

positive,

negative

to

negative.

perform

this

simple

test:

1.

Set

your

sound

system

for

MONO

(monophonic)

repro-

duction.

Be

sure

the

balance

control

is

centered

or

set

to

normal.

2.

Temporarily

place

the

speakers

so

that

they

are

facing

each

other

closely.

3

Play

music

containing

deep

bass

notes

through

the

system.

II

the

speakers

are

phased

correctly.

the

sound

will

appear

to

come

from

a

point

between

the

speakers

with

full,

natural

bass

response.

4.

If

the

music

seems

to

be

lacking

in

deep

bass.

reverse

the

wire

connections

to

one

speaker

and

repeat

the

test.

Use

the

connection

that

produces

the

most

power-

ful

bass.

Bose 201 Series II Loud Owner's guide - Page 3

Selection, RECOMMENDED, SIZES, Phasing

Page 3 highlights