Bose 901 Series II Owner's guide - Page 14

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FIG.

11

Since

the

second

pair

of

speakers

is

connected

in

parallel

with

the

first

pair,

a

second

Equalizer

is

not

required.

For

this

reason,

the

BOSE

901

is

available

at

lower

cost

as

an

"Add

-On

Pair,"

without

the

Equal.

izer.

To

connect

the

second

pair

of

speakers,

simply

connect

the

8

OHMS

terminal

of

the

second

left

speaker

to

the

8

OHMS

terminal

of

the

first

left

speaker.

Connect

the

COM

terminal

of

the

second

left

speaker

to

the

COM

terminal

of

the

first

left

speaker.

Follow

a

similar

procedure

for

the

right

speaker.

Note:

If

your

amplifier

has

separate

output

connections

for

different

speaker

impedances.

you

should

connect

each

pair

of

speakers

to

the

4

OHM

terminals

of

your

power

amplifier.

V.

IN

CASE

OF

DIFFICULTY

If

you

suspect

that

there

is

a

problem

with

your

901

system,

it

is

worth

a

few

minutes

of

your

time

to

determine

whether

your

901s

are

defective;

and

if

so,

that

you

return

only

that

part

of

the

system

which

is

defective.

If

one

speaker

sounds

defective,

switch

the

left

and

right

channel

speaker

cables

at

the

point

where

they

are

connected

to

the

amplifier

or

receiver.

If

the

trouble

moves

to

the

other

speaker,

it

is

not

in

the

speakers

or

in

the

speaker

wiring.

As

noted

earlier

in

this

manual,

if

you

hear

distortion

with

both

speakers

at

high

sound

levels

which

disappears

when

you

turn

the

volume

down

or

switch

the

BELOW

40

switch

to

CONTOUR,

you

are

probably

overloading

the

ampli-

fier.

If

this

is

the

case,

leave

the

BELOW

40

switch

in

the

CONTOUR

position

for

the

recording

you

are

playing.

(See

Section

IV,

O.1

If

the

trouble

seems

to

be

in

the

Equalizer,

be

sure

that

the

system

operates

properly

with

the

Equalizer

out

of

the

circuit.

Check

this

by

switching

the

preamplifier

or

receiver

TAPE

MONITOR

switch

to

the

OUT

or

NORMAL

position.

Be

certain

that

all

cables

are

connected

properly

and

that

the

cables

are

not

defective.

If

the

trouble

persists,

contact

your

dealer.

He

will

arrange

for

service

either

by

having

the

unit

serviced

at

a

Factory.

Authorized

Service

Agency

or

at

the

BOSE

Factory.

If

it

becomes

necessary

to

return

your

unit

to

the

Factory,

he

can

obtain

a

Return

Authorization

Number

which

must

appear

on

the

outside

of

the

carton

when

the

unit

is

returned

to

the

Factory.

Shipments

arriving

at

the

BOSE

Factory

without

a

RETURN

AUTHORIZATION

NUMBER

on

the

outside

of

the

carton

are

not

accepted,

but

are

returned

freight

collect

to

the

sender.

Units

must

be

returned

prepaid.

DO

NOT

SHIP

VIA

PARCEL

POST.

VI.

TECHNICAL

INFORMATION

A.

The

System

is

packed

in

Two

Cartons

Marked

"Part

1"

and

"Part

2"

Weight:

Part

1

—

44

pounds

Part

2

—

42

pounds

Carton

Dimensions:

22-3/4

-

W

x

15"

H

x

16-1/2"

D

14

Bose 901 Series II Owner's guide - Page 14

Difficulty, Technical, Information

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