i have two 12" Audiomobile (they went out of business....once top of the line though) subs they have anywhere from a 7-10 inch mounting depth. I have a 2005 F-150 supercrew....is there any possible way to put these in?

 

Add the mounting depth + xmax+ 1.5 inch, and that should be the depth you need approximately to fully push the sub. My avalanche has a mounting depth of almost 7 inch and my box is about 9.5 inches deep

 

I am confused. How can they have anywhere from 7-10" of mounting depth? They should have one mounting depth length. Anyway without a seat lift, there is almost no way to get 7" of depth under the seat.

 

they are in a box already cause they wer ein my brothers land rover....so i dont know the mounting depth......o i should have also said im not moutning them so they fire to the floor....im mounting them in the side...so u can see the face of them when looking at the rear seat....if that makes any sense

 

You would need a seat lift, for example:
http://www.lmiwelding.com/kits_supercab.htm