I just got a kappa perfect 12.1 for christmas with a box but my sub doesn't fit in the box i need a spacer to lift the magnet up off the back does anyone know if they make like a 12" spacer to go around the hole or something???
you never want to use a spacer when installing subwoofers, you are going to have to buy a new box. (typically) you have to buy a box that has about 3" of clearance from the magnet to the back of the box
if you dont use a spacer try sanding out a grove where the magnet would go. as long as you dont get carryed away it should work fine. but if the box is that small you might consider a bigger box