Harman Kardon A401 Owners Manual - Page 9

Operating

the

A-401

harman

karcton

Familiarize

yourself

with

the

front

panel

controls.

There

are

five

knobs

and

six

pushbuttons

controlling

al

l

the

features

of

the

amplifier.

Each

of

the

controls

performs

a

different

function,

but

instead

of

discussing

each

control

separately,

we

will

illustrate

how

they

work

together

to

control

the

reproduction

of sound

through

the

A-401.

Find

the

VOLUME

control

and

turn

it

down

(counterclockwise).

Push

the

POWER

switch

to

turn

the

A-401

on.

Playing

Records

with

the

A-401

Five

basic

controls

are

used

to

play

back

disc

recordings

through

the

A-401.

FUNCTION,

VOLUME,

BALANCE,

TREBLE

and

BASS.

Make

the

following

adjustments

to

these

controls

and

the

SPEAKERS

switch

after

activating

your

turntable

or

record

changer:

(1)

SPEAKERS

1

—

On

(Push

"in")

(2)

FUNCTION

—

"Phono"

position

(3)

BALANCE,

BASS,

TREBLE

—

Neutral

position

(12

o'clock)

(4)

VOLUME

—

Advance

(clockwise)

to

comfortable

loudness

level.

You

should

now

hear

sound

from

the

disc

through

your

system.

To

increase

or

decrease

the

loudness

of

the

playback,

the

VOLUME

control

may

be

advanced

(clockwise)

or

turned

down

(counter-

clockwise).

The

BALANCE

control

if

turned

counterclockwise

will

shift

the

loudness

to

the

left

speaker

by

attenuating

(reducing

the

loudness

of)

the

right

speaker.

When

turned

in

the

other

direction,

it

has

the

opposite

effect.

The

SPEAKER

1

pushbutton

connects

or

defeats

the

loudspeakers

connected

to

SPEAKER

SYSTEM

1.

(If

you

have

speakers

connected

to

SPEAKER

SYSTEM

2,

they

are

controlled

by

the

SPEAKERS

2

pushbutton

on

the

front

panel).

control

anvil/ler.

A

•

4

3

2

01

Play

a

stereo

disc

with

strong

bass

passages.

Listen

carefully

to

the

bass.

If

you

don't

think

it

is

as

full

as

it

should

be

reverse

the

speaker

connections

for

one

speaker.

If

the

bass

response

improves

your

speakers

were

out

of

phase.

If

the

bass

response

is

poorer

re-

connect

the

speaker

as

it

original

ly

was.

Push

the

POWER

switch

off.

Recheck

your

connections

both

at

the

rear

of

the

A-401

and

at

the

terminals

of

both

loudspeakers.

If

you

are

using

two

dissimilar

loudspeakers,

it is

possible

that

their

internal

connections

have

reverse

polarity,

causing

them

to

be

out

of

phase.

Reverse

the

connections

made

at

the

speaker

or

the

amplifier

(NOT

BOTH)

for

one

channel

ONLY.

The

system

should

now

be

in

phase.

Push

the

MONO

switch

to

return

it

to

stereo

position.

The

phasing

test

can

be

done

with

any

program

material,

but

disc

recordings

are

the

recommended

method.

Stereo

material

is

suggested

to

make

the

effect

more

obvious.

If

you

do

not

get

sound

at

this

point,

check

the

control

positions

given

above.

Also,

be

sure

the

TAPE

MONITOR

switch

is

in

the

"out"

position.

Leave

the

volume

control

at

the

9

o'clock

position

while

you

are

adjusting

the

other

controls.

If

you

still

get

no

sound,

check

the

back

panel

connections

for

PHONO,

then

check

the

turntable

itself.

NOTE:

Whenever

you

check

connections

at

the

back

panel,

always

push

the

POWER

switch

off.

If,

at

average

l

istening

levels,

you

hear

an

objectionable

(i

.e.

easi

ly

audible)

amount

of

hum,

try

disconnecting

the

ground

wire

from

the

turntable

to

the

A-401.

Some

turntable/cartridge

com-

binations

actual

ly

produce

less

hum

this

way.

Another

source

of

hum

is

inadequate

seating

of

the

phono

signal

cables

in

the

receptacles

of

the

A-401.

Check

this

thoroughly.

Harman Kardon A401 Owners Manual - Page 9

turntable/cartridge

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