Samsung HT-DB650 - Manual (Page 46)

Setting the Delay Time
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Setting up the Speaker Delay Time
When 5.1CH Surround Sound is played, you can enjoy the best sound if
the distance between you and each speaker is the same. Since the sounds
arrive at the listening position at different times depending on the
placement of speakers, you can adjust this difference by adding a delay
effect to the sound of the Center and Surround Speakers.
2 1
Press MENU button.
Press Cursor button
to move to ‘Audio’ and
then press ENTER
button.