Thank you for all your knowledge on these REW type details guys.

Having an Anthem Mrx720 I'm still not sure how they deal with subs.
Followed their instructions {set subs SPL to 71 for dual EP500\SVS PB1000} should get them to 75DB. paired. Though I don't think they are treated separately as Denon does.

To Trevor would the Phase adjusting method you explained to us around a year or so ago, Raising the sub distance to the highest SPL. Still be effective in this situation? Or would it just add more delay?