before displacement ? so do you mean build the box to 1.9 cubic feet and that wil account for the displacement of the subs?

 

how does the frequency response look at 1.9 cubic feet ? and how did you calculate that figure ?

 

I threw those paramaters into winisd and thats what it gave me for 2 10s sealed with a QTC around .707

That is the size you need before displacment.. the magnets, basket, ect take up some volume... Id just build one around 2cubes and that should be good enough....

 

bass box pro 6 gave me a QTC of .7 , but how did the frequency response look when you did it ? or will a roll off like that make much of a difference