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:
What is delay time?
Front
speakers
Am
Bm
Surround speakers
1Use the delay time calculation
chart on the right. |
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Example: |
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When A = 3 m,B = 3 m, |
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the delay time is 20 ms. |
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2 Use the following | 29 | 26 | 23 | 20 | |
formula for calculation. | 5 | 4 | 23 | ||
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Delay time = | A (m) | 3 | 2 |
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20 + 3 x (A - B) (Unit: ms) |
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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.
4Adjust the volume level of each speaker.
1Ensure that “TEST L” is displayed. Test tone will be output from each speaker.
2Adjust 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.
To increase
LEVEL
CONTROL
To decrease
3After having adjusted all of the speaker levels, establish the setup.
SETUP
After this, the unit enters the condition for “5 Adjust the delay time”.
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)
SURROUND
T E S T 5
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 dB.
÷The volume level can be adjusted in the range from
÷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.
5Adjust the delay time.
1 Ensure that the delay time adjustment display is displayed.
2Adjust the delay time.
To increase
LEVEL
CONTROL
To decrease
3Establish the setup.
SETUP
This is the end of setup (the unit returns to the condition before starting the setup operations).
÷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.
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Front speaker | Surround speaker | |||||
side | side |
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