Harman Kardon HK230A Owners Manual - Page 3

INSTALLATION

PROCEDURE

VENTILATION

Although

your

new

Nocturne

Receiver

rarely

develops

high

heat,

it

is

still

recommended

that

you

leave

the

back

of

the

cabinet

open.

If

this

is

not

possible,

provide

several

large

holes

or

slots

as

low

down

and

as

high

up

in

the

cabinet

back

as

possible.

As

an

alternative,

holes

may

be

provided

in

the

sides,

bottom

or

top

of

the

cabinet.

Remember

that

really

effective

ventilation

requires

provision

for

cool

air

to

enter

at

the

bottom

and

hot

air

to

leave

at

the

top.

A

minimum

clearance

of

two

(2)

inches

should

be

allowed

on

each

side

and

in

the

rear,

between

the

chassis

and

the

cabinet,

and

three

(3)

inches

are

required

above

it.

Isolate

any

accessories

which

might

interfere

with

ventilation.

For

example,

do

not

drape

plastic

or

rubber

covered

interconnecting

cable

over

the

equip-

ment.

The

rear

panel

surface

of

your

receiver

has

been

designed

as

a

heat

dis-

sipating

device

for

the

output

transistors.

This

area

will

become

warm

under

normal

use

and

should

not

be

cause

for

concern.

POWER

REQUIREMENTS

Connect

the

AC

line

cord

to

any

outlet

furnishing

117

volts,

60

Hertz

AC

current.

The

voltage

may

vary

between

105

and

125

volts.

An

auxiliary

AC

power

outlet

is

provided

on

the

rear

panel

of

your

receiver.

Any

accessory

equipment

(tape

recorder,

phonograph

record

player,

etc.)

may

be

connected

to

this

receptacle

and

will

be

controlled

by

the

POWER

switch

on

the

front

panel.

SPEAKER

PHASING

When

more

than

one

speaker

is

used

in

a

music

reproducing

system,

the

speakers

must

be

connected

in

a

manner

which

will

allow

them

to

work

together.

Both

left

and

right

speakers

must

operate

in

perfect

unison,

moving

back

and

forth

together.

If

the

speakers

are

moving

in

opposite

directions,

the

result

will

be

diminished

bass

response

and

decreased

realism

of

sound.

When

this

occurs,

the

speakers

are

said

to

be

out

of

phase.

Checking

for

proper

phase

and

cor-

recting,

if

required,

is

quite

simple.

1.

After

connecting

your

speakers,

place

the

stereo

receiver

in

the

A

+

B

or

monophonic

mode

of

operation.

2.

Play

a

record

tape,

or

FM

broadcast

which

has

a

single

speaking

or

singing

voice,

or

a

solo

instrument.

3.

The

voice

or

instrument

should

appear

to

be

coming

from

an

area

directly

between

the

two

speakers.

If

the

speakers

are

out

of

phase,

the

sound

will

appear

to

be

coming

from

the

two

individual

speakers.

4.

If

you

determine

that

the

speakers

are

out

of

phase,

simply

disconnect

the

leads

from

only

one

of

the

speakers

and

reverse

them.

The

system

will

then

be

in

phase.

This

completes

your

speaker

connections.

Your

receiver

is

a

solid

state

device

which

does

not

contain

audio

output

transformers.

It

is

therefore

not

necessary

to

match

the

impedance

of

your

speakers

to

the

receiver.

Your

unit

will

perform

perfectly

with

any

speaker

which

has

an

impedance

of

4,

8

or

16

ohms.

2

Harman Kardon HK230A Owners Manual - Page 3

Installation, Procedure

Page 3 highlights