Harman Kardon AVP-1A Owners Manual - Page 21

ADDITIONAL

HINT:

After

system

polarity

checks

are

completed,

use

the

internal

noise

generator

in

the

AVP1A

to

verify

proper

hookup.

The

burst

of

noise

should

start

at

left

front

and

move

clockwise

around

the

room.

The

Noise

Sequence

switch

on

the

rear

panel

of

the

AVP1A

should

be

set

to

turn

off

the

L

and

R

Side

outputs.

Note:

If

dual

-drive

surrounds

are

used

it

is

very

important

that

you

observe

proper

polarity.

Read

the

instructions

packaged

with

the

dipoles

for

addi-

tional

installation

and

hookup

or

if

you

are

only

going

to

use

the

dipoles

with

a

single

stereo

amplifier.

INPUT

LEVEL

CALIBRATION

It

is

necessary

to

adjust

the

input

level

of

sources

in

order

to

get

the

best

results

from

your

AVP1A.

This

adjustment

yields

the

best

dynamic

range

from

the

surround

decoder

circuitry,

preventing

overload

distortion

or

excessive

back-

ground

hiss.

Correct

cal

ibration

also

ensures

accurate

tracking

of

the

steering

logic

and

the

modified

Dolby

B

noise

reduction

system

in

the

Dolby

Pro

Logic

circuitry.

A

test

tone

(Chapter

5

on

WOW!)

can

be

used

in

conjunc-

tion

with

the

front

panel

LED

level

display

to

calibrate

the

system.

Feed

in

the

test

tone

and

adjust

the

input

level

so

that

the

0

dB

LED

just

reaches

full

intensity.

Under

normal

operating

conditions,

the

red

LED

should

never

do

more

than

flicker

occasionally

(which

indicates

input

overload).

If

no

test

tone

is

available,

you

can

still

calibrate

the

system

with

reasonable

accuracy

by

turning

up

the

input

level

con-

trol

until

the

0

dB

LED

glows

brightly

during

medium

level

passages

in

movies,

but

not

high

enough

to

illuminate

the

red

LED.

Movies

are

duplicated

at

slightly

different

audio

levels,

so

you

may

need

to

touch

up

this

adjustment

occa-

sionally.

You

may

expect

a

1

to

3

dB

variation

among

vari-

ous

film

transfers.

AUTO

BALANCE

/

INPUT

BALANCE

The

Automatic

Input

Balance

circuit

corrects

improperly

bal-

anced

software,

which

tends

to

pul

l

the

dialog

off

center.

These

channel

errors

occur

in

the

multiple

copying

stages

between

the

original

master

and

your

source.

In

most

cases

the

autobalance

circuitry

within

your

AVP1A

wi

ll

provide

extremely

accurate

correction.

Occasionally,

some

software

may

have

errors

beyond

the

correction

ability

of

the

internal

circuitry.

To

manually

correct

for

such

imbalances,

press

the

left

or

right

button

located

on

the

right

side

of

the

front

panel

of

the

AVP1A

to

turn

off

the

autobalance

circuit.

You

may

also

perform

these

same

functions

from

the

remote

control.

With

the

Center

output

on

but

with

the

Center

Speaker

amplifier

turned

off,

push

the

left

or

right

channel

button

to

minimize

leakage

of

center

channel

dialog

to

left

or

right

speakers.

The

liquid

crystal

display

will

indicate

the

amount

of

level

change.

Turn

the

center

channel

amplifier

back

on

to

restore

normal

system

operation.

When

your

wish

to

restore

Autobalance

operation,

push

the

AUTO

button

(located

between

the

left

and

right

buttons)

to

disengage

manual

balance.

OUTPUT

LEVEL

CALIBRATION

The

AVP1A

provides

individual

channel

output

level

con-

trols.

These

al

low

you

to

compensate

for

differences

in

amplifier

and

speaker

sensitivities

and

for

placement

varia-

tions

from

installation

to

installation.

These

set

-and

-forget

adjustments

are

essential

for

reproducing

proper

soundstag-

ing

and

image

localization.

These

controls

are

located

on

the

rear

panel

of

the

AVP1A

just

above

the

audio

output

jacks.

The

output

levels

are

adjusted

after

completing

the

input

level

adjustments.

Once

input/output

level

cal

ibration

is

completed,

system

volume

changes

are

made

using

the

up/down

buttons

on

the

infrared

remote

control.

The

best

way

to

adjust

the

output

level

controls

is

by

using

a

dB

Sound

Pressure

Level

(SPL)

meter

in

conjunction

with

the

internal

bandwidth

-limited

pink

noise

generator

in

the

AVP1A.

The

goal

is

to

set

the

volume

at

the

primary

listen-

ing

position

to

read

85

dB

SPL

(C

-weighted

low

mode)

from

each

speaker

in

sequence,

using

the

individual

output

level

controls.

You

should

use

the

meter

pointing

straight

up

towards

the

ceiling.

Harman Kardon AVP-1A Owners Manual - Page 21

Harman Kardon AVP-1A Manual

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