I thought that the distance from the rear wall was a suggested distance as opposed to that being totally arbitrary.
that's right - it's not arbitrary. you can see that 3'-4' is recommended in Diagram 4 as well.
I guess the thing that throws me off about the chart is the blank spaces under the 4' column. Have any light to shed there?
no idea why they left these 2 positions empty. Several thoughts crossed my mind:
* you cannot sit 6' or 8' away & have the speakers 4' from the rear wall (this seems ridiculous!)
* if you sit 6' or 8' away the tilt remains fixed at 5" for both (agaain, this makes little sense)
* from the 3' column note that the tilt angle increases 1" when distance is reduced 10'->8' & another 1" when distance is decreased from 8'->6'. Thus, for the 4' column, the tilt-back for the 8' distance = 6" & for the 6' distance tilt-back is 7".
Thanks you for your detailed explanation above.
no problem. good to note that you found it somewhat useful.