Bose 501 Series II Owner's guide - Page 5

2.

Proper

Phasing

of

Your

501s

It

is

important

that

the

connections

to

your

speaker

and

receiver

or

amplifier

be

the

same

for

both

channels

so

that

both

speakers

are

in

phase.

(Incorrect

phasing

will

reduce

the

bass

output

of

the

speakers.)

The

two

terminals

on

the

back

of

the

501

are

marked

4

OHMS

and

COM.

Start

with

your

left

501.

Place

it

on

the

left

side

of

the

room.

Connect

this

speaker

to

the

left

channel

speaker

output

terminals

of

your

receiver

or

amplifier.

(If

there

is

a

choice

of

impedances

on

the

amplifier

output,

use

the

terminal

marked

"4

OHMS."

Connect

the

"COM"

terminal

of

the

left

speaker

to

the

"O"

or

"GROUND"

terminal

of

the

left

channel

output.

Connect

the

"4

OHM"

terminal

of

the

speaker

to

the

"PLUS"

or

"4

OHM"

terminal

of

the

left

channel

amplifier

output.

Connect

the

right

speaker

in

exactly

the

same

manner.

(Check

your

connections

carefully

by

observing

the

rib

marking

on

the

zipcord

wire,

allowing

you

to

determine

which

wire

is

connected

to

which

terminal).

If

stranded

wire

is

used,

be

certain

that

the

loose

strands

are

not

accidentally

touching

the

other

terminal

of

the

amplifier,

causing

possible

damage

or

a

short

circuit.

Also

make

certain

that

all

amplifier

and

speaker

terminals

are

securely

tightened.

3.

Fusing

Your

501s

Any

loudspeaker

is

subject

to

damage

if

the

amplifier

powering

it

should

fail.

Using

a

fuse

with

each

speaker

will

minimize

the

possibility

of

serious

damage

to

your

speakers.

Use

a

BUSS

AGC-3

Fuse

for

amplifiers

rated

less

than

50

watts

rms

or

a

MDL-2

Fuse

for

amplifiers

rated

over

50

watts

rms.

The

fuse

should

be

connected

in

series

with

either

of

the

two

wires

in

the

cable

to

each

speaker.

A

fuse

holder,

such

as

a

BUSS

-3383.1

or

a

LITTELFUSE

356001,

may

be

used

for

convenience.

IV.

IN

CASE

OF

DIFFICULTY

If

you

suspect

a

problem

with

one

of

your

501s,

it's

worth

a

few

minutes

of

your

time

to

determine

whether

the

defect

is

in

the

501

or

in

some

other

portion

of

your

high

fidelity

system.

If

one

speaker

sounds

defective,

switch

the

left

and

right

speaker

cables

where

they

are

connected

to

your

amplifier

or

receiver.

If

the

trouble

moves

to

the

other

speaker,

the

defect

is

not

in

the

speaker

or

the

speaker

wiring.

If

the

trouble

appears

in

both

speakers,

connect

your

501s

to

another

amplifying

source

or

high

fidelity

system

that

is

operating

properly.

If

the

trouble

is

not

apparent,

the

difficulty

is

not

with

the

speakers.

If

the

trouble

persists

in

one

or

both

speakers,

contact

your

dealer.

He

will

verify

the

defect,

and

will

arrange

for

service

either

at

our

Factory

-Authorized

Service

Agency

or

by

the

BOSE

Factory.

If

it

becomes

necessary

for

you

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.

BOSE

Corporation

will

make

every

effort

to

remedy

any

problem

within

the

terms

of

the

warranty

at

minimum

inconvenience

to

you.

(See

Section

VII.)

V.

TECHNICAL

INFORMATION

Speaker

Complement

Woofer:

A

10

-inch,

long

-excursion

woofer

with

a

specially

designed

high

-temperature

one

-inch

long

voice

coil,

long

-

throw

foam

surround

and

spider.

Using

a

high-energy

ceramic

magnet,

this

woofer

is

capable

of

extremely

high

power

output

at

low

frequencies.

In

addition,

the

cone

and

dust

cap

are

designed

for

exceptionally

smooth

frequency

response

throughout

the

middle

-frequency

range.

Tweeter:

Two

3.112

-inch,

high

-sensitivity

tweeters,

with

large

ceramic

magnets

to

minimize

power

dissipation

in

each

speaker.

Additionally,

they

are

designed

for

very

smooth

and

extended

high

-frequency

response.

These

speakers

are

carefully

matched

to

the

woofer

and

crossover

network.

5

Bose 501 Series II Owner's guide - Page 5

Difficulty, Technical, Information

Page 5 highlights