Polk Audio I-Sonic 2 - Manual (Page 20)

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1. Play a Dolby Digital source and push the DELAY button on the
remote control. This menu will appear on your TV screen:
2. Measure the distance from your main listening position to the
center speaker in feet (Fig. 6).
3. Measure the distance from your main listening position to the front
speakers in feet (Fig. 6).
4. Subtract the center distance (B) from the front speaker distance (A).
In the example in Fig. 6, that would be 20 - 18 = 2.
5. Use the ▲ up and ▼ down arrow keys on the remote to move the
arrow shaped cursor on the menu to CENTER.
6. Use the g left and h right arrow keys to select the correct center
delay time. For every 1 foot of difference, select 1 mS of center delay.
The range of choices are 0,1,2,3,4, and 5 mS. In this example you
would select 2mS. (20 - 18 = 2).
7. Use the down arrow key on the remote to move the arrow shaped
cursor on the menu screen to SURROUND.
8. Measure the distance from your main listening position to the surround
speakers in feet. Subtract the surround distance (C) from the front
distance (A). In the example in Fig. 6, that would be 20 - 10 = 10.
9. Use the chart to determine the correct surround delay. For every
1 foot of difference, select 1mS of center delay. In this example, the
correct surround delay is 10mS.
10. Use the g left and h right arrow keys to select the correct
surround delay time shown on the chart. In this example, select 10ms.
The range of choices are 5, 10, and 15mS.
11. Use the ▼ arrow key on the remote to move the arrow shaped
cursor down to EXIT. Make sure SAVE is highlighted.
12. Push the ENTER button on the remote.
13. If at any time you wish to return to the preset factory defaults,
return to this on-screen menu, select DEFAULTS ON, save and exit.
The factory settings will be restored.
Front Minus Surround Dolby Digital Pro Logic
Distance (feet) Surround Delay Setting Surround Delay Setting
1 - 3 feet 5ms 15mS
4 - 6 feet 5ms 20mS
7 - 11 feet 10ms 25Ms
12 feet or more 15ms 30mS
Setting Dolby Pro Logic Delay
The channel delay function for Dolby Pro Logic exists for a somewhat
different reason than for Dolby Digital. There is a different default
surround delay value than that for Dolby Digital. Dolby Pro Logic does
not require a center channel delay. The factory preset delay default
values are Center = None and Surround = 30mS.
(Fig. 6)
1. Play a Dolby Pro Logic source and select Surround “On.” Push the
Delay button on the remote control and this menu will appear on your
TV screen:
2. Measure the distance from your main listening position to the front
speakers in feet (Fig. 6).
3. Measure the distance from your main listening position to the
surround speakers in feet (Fig. 6).
4. Subtract the surround distance (C) from the front distance (A).
In this example, it is 15.
5. Use the chart to find the proper surround delay time.
6. Use the down arrow key on the remote to move the arrow shaped
cursor on the menu screen to SURROUND.
7. Use the g left and h right arrow keys to select the correct
surround delay time shown on the chart. In this example, select 25ms.
The range of choices are 15, 20, 25, and 30mS.
8. Use the ▼ arrow key on the remote to move the arrow shaped cursor
down to EXIT. Make sure SAVE is highlighted.
9. Push the ENTER button on the remote.
10. If at any time you wish to return to the preset factory defaults,
return to this on-screen menu, select DEFAULTS ON, save and exit.
The factory settings will be restored.
Dolby Digital
Center delay = 2ms
Surround delay = 10ms
Pro Logic
Surround delay = 25ms
A
20'
B 18'
C 10'