Harman Kardon AVR 4500 Owner'S Manual Download Page 25

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SYSTEM CONFIGURATION

System Configuration

2. Measure the distance from the listening/ view-

ing position to the surround speakers.

3. Subtract the distance to the surround speakers

from the distance to the front speakers and mul-
tiply the result by 3.

The optimal delay time is the result of that sub-
traction. For example, if the front speakers are 3
m away and the surround speakers are 1 m away,
the optimal delay time is figured as (3–1)x3=6.
Thus, in this example, the delay time for Dolby
Digital should be set at six milliseconds.

NOTE:

The DTS, Logic 7, 5/7CH Stereo, Hall and

Theater modes use a fixed, nonadjustable delay
time.

The Dolby Digital Mode also includes a separate
setting for the center channel delay mode, since
the discrete nature of these signals makes the
location of the center channel speaker more criti-
cal. To calculate the delay for the center channel,
measure the distance from the preferred listening
position in the center of the room to both the
center channel speaker and either the left or right
speaker.

If the distances are equal, no further adjustment is
required and the center delay should be set to
zero. If the distance to the front speakers is
greater than the distance to the center speaker,
you may wish to reposition the speakers by mov-
ing the front left and front right speakers closer to
the listening position or the center speaker further
away from the listening position.

If repositioning of the speakers is not possible,
adjust the center delay time, adding one milli-sec-
ond of center channel delay for every 30 cm clos-
er to the listening position the center speaker is
than the front speakers. For example, if the front
left and front right speakers are each 3 m from
the listening position and the center channel
speaker is 2.4 m away, the delay is figured as
300 cm –240 cm=60 cm, suggesting an optimal
center delay of 2 milliseconds.

To set the delay time, continue within the

MASTER MENU

(Figure 1). If the system

is not already at that point, press the

OSD

button

to bring up the master menu.To make the

delay settings for the Dolby Digital mode (this
will include the Center delay setting, and the sur-
round delay for the Pro Logic mode will be set
automatically), press the

Set

button and

select any input now that is associated with a
digital input and the Dolby Digital surround mode
(the surround mode associated with each input
selected will be indicated by the

Surround

Mode Indicators

in the front panel), then

return to the master menu. Press the

Button

three times or until the on-screen

›

cursor is

pointing at the

DELAY ADJUST

line. Press

the

Set Button

to call up the menu.

Figure 6

As the Dolby Digital mode is selected, the

C E N T E R D E L A Y

line is where the first

adjustment is made. Now press the

‹

›

Buttons

until the number calculated using the

formula shown above for the center speaker
appears in the display. When the

C E N T E R

D E L A Y

is entered, press the

Button

once to move to the next line.

Now the

›

cursor will be at the

S U R R

D E L A Y

line so that the delay for the surround

speakers may be set. Press the

‹

›

Buttons

until the number calculated using the

formula for the surround speakers shown above
appears in the display. When the delay settings
are complete, press the

Button

once so

that the cursor is next to the

BACK TO

MASTER MENU

line and press the

Set

Button

to return to the

MASTER

menu.

Note that the delay settings may also be adjusted
at any time when the Dolby Digital or Dolby Pro
Logic II modes are in use by pressing the

Delay

button on the remote

. Then press the

⁄

buttons on the remote to select the Center

or Rear channels for adjustment, followed by a
press of the

Set

button

. Next, press the

⁄

buttons

on the remote until the

desired figure appears in the

Main Information

Display

and press the

Set button

twice to confirm the setting and return to the
normal display.

Night Mode Settings

The Night mode is a feature of Dolby Digital that
uses special processing to preserve the dynamic
range and full intelligibility of a movie sound
track while reducing the peak level. This prevents
abruptly loud transitions from disturbing others,
without reducing the sonic impact of a digital
source. Note that the Night mode is only
available when the Dolby Digital surround mode
is selected.

To adjust the Night mode setting from the menu
press the

OSD

Button

so that the

MASTER

menu appears. Then press the

button

once and press

Set

to select

the

SURROUND SETUP

menu. Again

press the

button

once and press

Set

to select the

DOLBY

menu (see fig. 7).

Figure 7

To adjust the Night mode setting, make certain
that the

›

cursor is on the

NIGHT

line of the

DOLBY

menu. Next, press

‹

›

Buttons

to choose between the following set-

tings.

OFF

: When

OFF

is highlighted, the Night mode

will not function.

MID

: When

MID

is in the highlighted video, a

mild compression will be applied.

MA X

: When

MAX

is in the highlighted video, a

more severe compression algorithm will be
applied.

When you want to use the Night mode feature,
we recommend that you select the MID setting as
a starting point and change to the MAX setting
later, if desired.

When the setting has been made, press the

⁄

buttons

so that the

›

cursor is next to

BACK T O SURR SELECT

, and press

the

Set

button

to return to the