Thank you for all of the suggestions guys! Let me try and answer a few more of your recent questions...
Max, the level matching was measured at both rows, give or take a db or two between the two sets of drivers so they are pretty close to each other. On the same note as the picture you posted, I did a little bit of testing with mic placement. In the front row, I get the 60hz peak across all three seats, at the ground and at the ceiing. This tells me that the 60hz peak is definitely length related, correct? I acknowledged the info on the BFD, thanks
I woud also like both rows to be good, at least in the low end, 30hz and below, I went with the IB's for that reason and I want everyone to feel what it's all about. I understand I won't get both rows identical but if I can tame the large peaks and have both rows within 5db of each other, I'm sure I can live with that, but then again, is that asking too much? I'm also not sure how to use the Spectrum function yet, actually never heard of it so I'm not sure how to detect distortion with that. And then there is integrating the mains... as soon as I plug those back in, bring on the cancelations once again. I have some serious tweaking there, but I guess when I'm happy with the subs only, I'll come back to you guys for help on implementing the mains
Lastly, Audyssey was not enabled during testing
FOH, I'm not sure what you mean by this...
"Again, as I've said, I believe there may be much more boundary interaction, both constructive and destructive, influencing things than modal issues."
"manual EQ'ing, in freq domain globally, ... and time domain as a group (ie rear subs as a group)"
I think I can time domain EQ only the rear subs (MFW's) via phase adjustment on the eq.2 box, but when I hook up the eq.2 box, I get a signal drop of a few db over the entire LF spectrum, I have to boost my gain on the EP4000 to cure that even though I don't like the idea. Regardless, time domain EQ would be phase adjustment, correct?
And speaking of location placement testing, I did a little more last night... I ended up trying to cancel the 60hz peak in the front row by placing one MFW on either side of the rear row firing at the IB's and it actually helped quite a bit but kind of reversed the results from having them in the back. So, I put one MFW at the side of the rear row and kept the other firing at one of the rear corners, decent compromise, but could be better. I'm thinking if I can pick up two more MFW's, I can have two firing at the corners to help the back row and then have two firing toward the front to help with the 60hz peak in the front row, am I thinking this correctly?
BassThat, I was about to tell you that I can only EQ the whole system as one or EQ the MFW's alone via the eq.2 box, but then, I technically could run from the AVR sub out, split that sub signal and run one line to the BFD and then to the IB side of the amp and the other sub out straight to the MFW side of the amp or to the eq.2 and THEN to the MFW side of the amp. If I do that, I can EQ for the IB's alone and or the MFW's alone, but., I'm not a fan of the eq.2 box yet so I would rather not use it.
Holy cow that was a finger full. I hope you understand it