Kenwood KR-897 - Manual (Page 25)

KFV897/KR-737 [EnJ
How to calculate the
proper delay time
Assuming that the distance from
the front speakers is A meters and
that from the surrourKf speakers is
B meters:
Front
speakers
® Use the delay time calculation
chart on the right.
Example:
When A * 3
■3 m.
the detay time is 20 ms.
What is delay time?
Surround
spealcecs
I' Use the following
formula for calculation.
Delay time = * '
20 + 3 X (A - B) (Unit: msl
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 volume level of each speaker.
O Ensure that 'TEST L' is displayed. Test
tone will be output from each speaker.
O Adjust the volume levels of the center
speaker and surround speakers with ref­
erence to the front speaker {left
& right)
levels.
(1) White test tone is output from the
speaker(s) to be adjusted,
(2) Adjust the speaker level.
To increase
LEVa
CONTROL
To decrease
O After having adjusted all of the speaker
levels, establish the setup.
SETUP
C3
After this, the unit enters the condition
for 'B Adjust the delay time'.
•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 B )
TEST R (Front speaker, right)
TEST S (Surround speakers)
(Only when PRO LOGIC is selected in step D)
Display when test tone is output from surround speakers
• Be sure to adjust from the listening position.
• Each press of a LEVEL CONTROL'key varies the level by 1 dS.
• 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.
Adjust the delay time.
• 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.
SUPnOUND
A/l _ n n
y\\
t
L. U
1
Adjustfneni
posrtkin
1
Delay time
From speaker
side
Surround speaker
side