I should mention that I have previously provided these distances to the 861 when specifying the speakers configuration in set up. I guess my quesiton is wether the 861 will automatically provide the correct time delays based on this information, or whether I need to go back into each preset and manually enter the necessary delays based on some formula. If the 861 automatically performs these calculations, does anyone out there make changes manually? If so, with what intentions and results? Thanks!