I did the dual discreet setup last night to fine tune my dual subs as outlined originally in post 3110.
I did something a tad differently though.
First thing I did was a tech version of a sub crawl.
I set up my EQ so it thought I had one sub, I ran the test and measurements until I had perfected the sub placement on SUB A. Then I switched to SUB B as a single and did the same tests and measurements until I had used the placements of the subs for the flatest (least need of adjustment) placement.
I then centered my microphone measurements all within a 6 foot radius of my seat in the center of the theatre seating.
Then added 4 more measurements at the edge of the seating for my guests, I have three large seats with mine being the seat centered to the screen in a slight fan shape.
A total of 10 measurements, after doing proper sub placement on each of two subs, then I ran the final measurements and saved the results.
I had two nearly 8db fluctuation from sub to sub even after proper placement in the 50hz range!
I then turned the subs away from each other so I wasn't getting a cancelling effect, turned one in one out, put them both straight etc until I found the right placement AGAIN.
It turns out the subs placed straigh ahead with just inches off center worked best.
I re-ran all of the tests and I am 100% certain my subs have the best sound as of right now.
I had 3db spikes in the 20hz range as opposed to initial pre-EQ days of 10db spikes at 20hz.
I had one sub down 10db at 50hz and one down 5db in reference to the flatline "after" adjustment of the EQ.
I had as much as 12db difference at 100hz from sub to sub, all with proper calibration and room placement.
I am going to summize that even with the most careful room placement and the most careful directional placement, the EQ STILL made my system smoother with less peaks and valleys.
In the end, I am pretty much done with fooling around and fiddling with it all.
I just wanted to mention that at 6 different frequencies there was as much as 12db of variation that was corrected.
This with two "identical" (for mass production anyways) subs....
The bass is incredible!
I watched T2 ROTF and the chairs and my chest shook for the entire movie, I might just sell my massage chair