Apogee stage manual speaker distance chart

09-13-11: Whiznant
Anybody check out that chart in the above link? Able to make any sense of it?

yeah, it's easy! ;-)

OK, so I'm assuming that "Diagram No 4" (which seems to be page 7 of 14 in the PDF) you comprehend, correct?

you must be talking about the table/chart on page "-7-" (which is page 10 of 14 in the PDF)?
Basically this chart is telling you how much tilt back you need to have - the 6 1/2 inches, 5 inches is the tilt back.

So, let's take an example: the 1st row - if you are seated 6' from the speaker and you have the Stages 3' from the wall behind the speaker, make sure that you have 6 1/2 inches of tilt back.
He's shown you how to measure tilt back - go back one page & you'll see that diagram of the Stage speaker. Towards the bottom, you'll see "Refer to text" near the arrow. That distance is measuring the linear distance between the plumb-bob & the rear of the Stage speaker, which is a measure of tilt-back.

Another example: if you are seated 14' from the speaker & have the Stages 3' from the wall behind the speaker, then, make sure that you have 4" of tilt back.

In Apogee speakers tilt back ensures that the drivers integrate at the listening position. The further away you sit from the speakers, the less the tilt back (4" vs. 6 1/2 inches).
Capiche??

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.