AVS Special Member
Join Date: Jun 2001
Location: Not far from Atlanta - but far enough!
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I'm not sure whether to post this hear or in the sub thread so I'll start here.
Both the Harmon Papers and Geddes strategies recommend various sub placements for positioning multiple subs to achieve the most linear frequency response. In either of those two approaches (particularly Geddes), it will be likely that one or more of the subs will NOT be the same distance from the main LP as another sub. In fact, you could end up, in a four sub room, with all four subs different distances from the main LP.
While I understand the approach of EQing all subs as one, the Audyssey SubEQ provides the ability to deal with subs where two of them are different distances from the main LP. Products like the QSC DSP 30 also provide that capability. In my case, when (using the DSP 30) i delayed the rear subs to match the distance of my front subs, the un-EQ'd FR got slightly worse.
So my question is: How important is it to compensate for distance differences when dealing with multiple subs that are placed in such a way that they are different distances from the main LP. And I ask this not from some theoretical position but rather sonically ---- can you hear it?.
Anyone reading this using multiple subs where the distance to the LP is not the same, you have EQ'd them but have not compensated for the distance differences electronically?
(I've re-read this several times and I'm not sure how clear it is but I'm not sure how to re-word the question!)
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