Harman Kardon PA2400 Owners Manual - Page 4

Connecting

a

Preamplifier

In

order

to

obtain

the

best

sound

quality

from

the

PA2400,

it

is

recommended

that

high

quality

interconnection

wires

be

used.

Their

quality

can

have

a

large

effect

on

the

quality

of

the

total

system.

Connect

the

wires

from

the

output

terminals

of

the

preamplifier

to

the

left

and

right

channel

power

amplifier's

INPUT

terminals.

Push

the

plugs

in

all

the

way.

Poorly

seated

plugs

tend

to

cause

hum,

noise

or

intermittent

operation

which

may

damage

the

speakers.

NOTE:

Do

not

interwind

the

preamplifier

connection

wires

with

the

power

cord.

It

may

degrade

the

sound

quality.

Do

not

turn

on

the

power

amplifier

before

turning

on

the

preamplifier,

and

always

turn

off

the

power

amplifier

before

turning

off

the

preamplifier.

The

speakers

or

power

amplifier

may

be

damaged

by

the

turn-off

transients

created

by

some

preamplifiers.

Auto

-Standby

Feature

Operation

The

PA2400

has

a

unique

ability

to

sense

when

it

is

not

receiving

a

music

signal

and

can

automatically

switch

into

a

"Standby"

mode.

When

this

happens,

the

power

amplifier

circuitry

completely

shuts

off

and

the

front

panel

power

indicator

color

changes

from

green

(for

"On")

to

amber

(for

"Standby").

When

the

amplifier

again

receives

a

music

signal,

it

will

return

to

the

"On"

state.

The

Auto

-Standby

feature

instantly

switches

the

amplifier

"On",

and

switches

it

to

"Standby"

approximately

2

minutes

after

the

incoming

music

signal

stops.

The

2

minute

time

before

switching

to

"Standby"

is

to

prevent

the

amplifier

from

unnecessarily

switching

between

modes

during

use,

or

while

the

user

is

changing

inputs

or

selecting

software.

This

feature

allows

leaving

the

amplifier

power

switch

in

the

"On"

position

when

the

amplifier

is

not

in

use.

This

can

be

a

benefit

in

many

systems

and

installations

where

the

amplifier

is

not

located

within

reach

or

is

in

another

room.

The

"Auto

-Standby"

feature

is

also

defeatable,

for

those

customers

that

prefer

the

amplifier

to

behave

in

a

conventional

way.

The

"Auto

-Standby"

defeat

switch

is

set

in

the

"Off"

position

at

the

factory.

Connecting

the

Speakers

CAUTION:

The

rated

impedance

of

the

speakers

to

be

connected

should

be

in

the

range

of

4

to

16

ohms

(8

to

16

ohms

for

bridged

mono

operation).

Connect

the

speaker

wires

carefully

to

the

SPEAKER

terminals

so

as

not

to

mistake

the

left

and

right

channels

or

reverse

the

speaker

polarities

(+

and

—).

Use

sufficiently

thick

wire

(16

gauge

minimum)

with

low

electrical

resistance.

It

is

recommended

that

color

-coded

wires

be

used

for

easy

determination

of

polarities.

Speaker

wires

should

be

as

short

as

possible,

and

the

left

and

the

right

channel

wires

should

have

the

same length.

3

Harman Kardon PA2400 Owners Manual - Page 4

Connecting, Preamplifier, Standby, Feature, Operation, Speakers

Page 4 highlights