The ONLY problem I had with my subwoofer is the magnets depth hitting the backside of the box. You can't see it in the pics since I've coated the box with a rubberized coating, but I had to cut about a 1" notch and move the woofer down that distance so it would clear, then I took that notch, woodglued and resprayed the whole box for the repair. Since you're making the boxes for basically Pioneer shallows, that shouldn't cause any problems for anyone like it did me as long as they stick with a shallow subwoofer.

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