Do you happen to have the measurements of the box? Did you have to raise the seat any?? I havent been able to find box's that fit underneath the back seat without having to raise the back seat. Thanks for the help.
here are the specs, they are Q-logics but have been discontinued from crutchfield, and the fit perfectly under the rear sets with no modifications at all
General
Box Type Sealed
Number of Boxes 1
Number of Speakers Per Box 1
Speaker Size 8
Cutout Diameter or Length (inches) 7 1/8
Maximum Speaker Depth (inches) 5-1/4
Box Volume (cubic feet) 0.35
Height (inches) 12-5/8
Width (inches) 16-3/8
Depth (inches) 7-3/8
Second Depth (inches) 4-3/4
Wood Thickness (inches) 5/8
Speaker Wire Connectors Spring Post
Box Color Gray/Black
Box Finish Carpet/ABS
hope this helps!