Kenwood KR-797 - Manual (Page 25)

KR-897/KR-797 (En)
25
How to calculate the
proper delay time
Assuming that the distance from
the front speakers is A meters and
that from the surround speakers is
B meters:
Adjust the volume level of each speaker.
4
1 Ensure that “TEST L” is displayed. Test
tone will be output from each speaker.
2 Adjust the volume levels of the center
speaker and surround speakers with ref-
erence to the front speaker (left & right)
levels.
(1) While test tone is output from the
speaker(s) to be adjusted,
(2) Adjust the speaker level.
3 After having adjusted all of the speaker
levels, establish the setup.
After this, the unit enters the condition
for “
5 Adjust the delay time”.
Front
speakers
Surround
speakers
What is delay time?
The sound entering the ears include the direct sound coming from the sound source and the indirect sounds reflected from the walls, floor,
ceiling, etc. The indirect sounds are delayed because they travel longer distance required for reflection before they reach the ears. The delay
time is the difference in time between the direct sound and indirect sounds.
Adjust the delay time.
5
1 Ensure that the delay time adjustment
display is displayed.
2 Adjust the delay time.
3 Establish the setup.
This is the end of setup (the unit returns
to the condition before starting the setup
operations).
SETUP
÷ Check the proper delay time for your listening room by referring to
“How to calculate the proper delay time”.
÷ Select an integer value which is closest to the value obtained with
“How to calculate the proper delay time”.
÷ The delay time can be adjusted to 15, 20, 25 or 30 ms.
Delay time
Surround speaker
side
Adjustment
position
Front speaker
side
LEVEL
CONTROL
SETUP
LEVEL
CONTROL
To increase
To decrease
÷Noise-like test tone moves across speakers at intervals of 1.5 seconds.
TEST L (Front speaker, left)
TEST C (Center speaker)
(Only when NORMAL or WIDE BAND is selected in step 2)
TEST R (Front speaker, right)
TEST S (Surround speakers)
(Only when PRO LOGIC is selected in step 1)
÷ Be sure to adjust from the listening position.
÷ Each press of a LEVEL CONTROL key varies the level by 1 dB.
÷ The volume level can be adjusted in the range from -10 to +10 dB.
÷ The front speaker (left & right) levels cannot be varied with the LEVEL
CONTROL keys.
÷ Adjust the volume level from each of the center speaker and surround
speakers while test tone it output from the corresponding speaker.
Display when test tone is output from surround speakers
SURROUND
T E S T 5
SURROUND
- X - - 2 0 11
1 Use the delay time calculation
chart on the right.
Example:
When A = 3 m,B = 3 m,
the delay time is 20 ms.
2 Use the following
formula for calculation.
Delay time =
20 + 3 x (A - B) (Unit: ms)
To increase
To decrease
07.6.11, 5:06 PM 25