I need a box for my 2 Kicker CVX12's. I am trying to decide to go with the subzone ZV212-2030 or the probox 212SPB. The probox has 2.25 cu. ft. per side which is perfect for the CVX's, the subzone has 2 cu. ft per side. I'm not to familiar with the probox HDF. Shed me so light please!!