Sub placement with Vandy 2CE sigs

I bought a couple of subs from Paul and am wondering where they should be placed in relation to the Vandys. Any ideas or experience with this set up/
If you were brilliant enough to get Vandy 2WQ subs you can start behind them or in the corner adjust High pass to proper input Imp on amp and then volume on each and contour to preference.
Cheers John
No, unfortunately, I could not afford the 2WQ subs. What I am wondering is if placing the subs behind and close to the Vandys could degrade the sound of the vandys in any way...