Bose Model 301 Owner's guide - Page 4

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1.

INTRODUCTION

Thank

you

for

purchasing

the

BOSE

Model

301

Direct/Reflectinge

speaker

system.

Your

Model

301s

are

the

product

of

many

years

of

BOSE

research

and

dedication

to

the

art

of

bringing

superb

musical

reproduction

into

your

home.

PLEASE

TAKE

TIME

TO

READ

THIS

MANUAL

CAREFULLY.

It

will

help

you

obtain

the

full

benefits

of

the

Model

301's

unique

design.

2.

UNPACKING

INSTRUCTIONS

Two

Model

301

speakers,

marked

"Part

1"

and

"Part

2,"

are

packed

in

a

single

shipping

carton.

Unpack

both

speakers

care-

fully,

saving

the

carton

and

packing

materials

for

possible

trans-

portation

or

shipment

at

a

later

date.

If

either

of

the

speakers

has

visible

damage

when

you

unpack

it,

do

not

place

the

damaged

speaker(s)

in

operation.

Repack

the

speaker(s)

in

the

original

carton

with

the

complete

packing

material

and

notify

your

dealer

immediately.

WARNING

—

DO

NOT

HANDLE

THE

SPEAKERS

BY

THE

FOAM

GRILLE.

GRASP

ONLY

THE

CABINET

WHEN

MOVING

OR

PLACING

THE

SPEAKER.

3.

DESIGN

FEATURES

The

BOSE

Model

301

Direct/Reflecting

loudspeaker

incorporates

several

features

that

make

its

operation

and

placement

different

from

other

loudspeakers.

The

exceptional

performance

of

the

Model

301,

to

a

great

degree,

can

be

attributed

to

Asymmetrical

Design,

the

Direct

Energy

Control,

and

a

Dual

Frequency

Crossover

Network.

ASYMMETRICAL

DESIGN

The

Asymmetrical

Design

of

the

Model

301

provides

a

high

proportion

of

reflected

sound

at

high

frequencies

and

contributes

to

the

exceptionally

spacious

stereo-

phonic

reproduction.

To

provide

balanced

spatial

properties

in

stereo

reproduction,

the

Model

301

stereo

pair

is

designed

so

that

the

speaker

used

on

the

left-hand

side

of

the

room

(this

4

speaker

is

called

"Part

1")

is

a

mirror

image

of

the

speaker

on

the

right-hand

side

(this

speaker

is

called

"Part

2").

The

Asymmetrical

Design

and

mirror

image

construction

of

the

Model

301

are

shown

in

Diagram

1

(page

5).

The

tweeters

direct

most

of

their

energy

toward

the

side

walls

of

the

room.

The

side

walls

reflect

high

frequency

energy

uniformly

throughout

the

listening

area,

resulting

in

a

stereo

image

extending

from

one

wall

of

the

room

to

the

other

(Diagram

2,

page

6).

The

advantage

of

this

design

is

that

minimum

reliance

is

placed

on

the

rear

wall

of

the

room

for

providing

reflections.

This

maximizes

the

flexibility

of

placement

of

the

loudspeaker.

DIRECT

ENERGY

CONTROL

This

control,

located

at

the

top

of

the

cabinet,

allows

you

to

select

the

proportion

of

direct

to

re-

flected

sound

at

high

frequencies

to

produce

the

optimum

spatial

characteristics

for

your

particular

room.

If,

for

example,

the

side

walls

of

the

room

are

absent,

too

far

away,

or

covered

by

absorbing

material,*

the

control

can

be

set

to

provide

predominantly

direct

sound

at

high

frequencies.

A

predominance

of

direct

sound

results

in

a

stereo

localization

of

sounds

primarily

to

the

area

between

the

two

speakers.

Sometimes

this

more

"inti-

mate"

sound

is

preferred

for

soloists

and

small

groups.

If

a

reflecting

side

wall

is

present,

and

a

more

spacious

sound

presentation

is

desired

(such

as

for

an

orchestra),

the

control

can

be

set

to

provide

a

larger

proportion

of

reflected

sound

at

high

frequencies.

This

results

in

sound

that

actually

extends

beyond

the

spacing

of

the

speakers.

DUAL

FREQUENCY

CROSSOVER

NETWORK

Contrary

to

tradi-

tional

design

philosophies,

the

crossover

network

of

the

Model

301

deliberately

overlaps

the

response

of

the

woofer

and

tweeter

by

over

an

octave,

and

adjusts

the

amplitude

and

phase

response

of

the

woofer

and

tweeter

to

provide

exactly

complementary

'Any

surface

that

feels

hard,

such

as

wood,

glass,

wallboard,

plaster

or

brick,

is

a

good

reflector.

A

soft

surface,

such

as

acoustic

tile,

drapery,

or

upholstered

furniture,

will

absorb

sound.

Bose Model 301 Owner's guide - Page 4

Bose Model 301 Manual

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