AVR 35 (serv.man4) - Harman Kardon Audio User Guide / Operation Manual. Page 23

System Configuration

21

Delay Settings
One aspect of the surround modes is the
delay of audio signals between the front
speakers and the rear speakers. Each
surround mode is factory preset with a
specific delay time, but it is possible to
individually adjust the delay timing to
custom tailor the sound to your individual
taste and the acoustic conditions in your
listening room or home theater. 

The factory setting is appropriate for most
rooms, but some installations create an
uncommon distance between the front and
surround speakers that may cause the
arrival of front channel sounds to become
disconnected from surround channel
sounds.

To resynchronize the front and surround
channels, follow these steps:

1. Measure the distance from the
listening/viewing position to the 
front speakers in meters.

2. Measure the distance from the
listening/viewing position to the
surround speakers. 

3. Subtract the distance to the surround
speakers from the distance to the front
speakers and multiply the result by 3.

a. When setting the delay time for the
Dolby Digital surround mode, the
optimal delay time is the resulting
figure. For example, if the front
speakers are 3m away and the
surround speakers are 1m away, the
optimal delay time is figured as 
(3-1)x3=6. Thus, in this example,
the delay should be set at six
milliseconds.

b. When setting the delay time for
Dolby Pro Logic take the result of the
calculation above and add 15 to
obtain the optimal delay time. For
example, if the front speakers are 3m
away and the surround speakers are
1m away, the optimal delay time is
figured as (3-1)x3+15=21. Thus in
this example, the delay should be set
at twenty milliseconds.

NOTE: The Theater, Hall 1 and Hall 2
modes use a fixed, non-adjustable delay
time.

The Dolby Digital mode also provides a
separate setting for the center channel
delay mode, since the discrete nature of
Dolby Digital signals makes the location of
the center channel speaker more critical.
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 moving
the front left/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 so
that you add one millisecond of center
channel delay for every 30cm that the
distance to the center speaker lags behind
the front speakers. For example, if the
front left/right speakers are each 3m from
the listening position and the center
channel speaker is 2.4m away, the delay is
figured as 300cm-240cm=60cm,
suggesting an optimal center delay of 
2 milliseconds.

To set the delay times, follow these steps:

1. Put the AVR35RDS in the Dolby Pro

Logic mode by pressing the 

Ó

on the front

panel, or by pressing the 

g

on the remote,

followed by the 

⁄

¤

buttons 

h

until

PRO LOGIC

appears in the 

V

and the

indicator 

F

lights.

2. Press the 

button 

x ı

on the

remote or front panel. The words 

S DELAY TIME

(Surround Delay

Time) will appear in the

V

.