Thanks Monte and Guy13.
Brad, they definitely have some great DIY projects. My experience is only positive. Who knows, a subwoofer might be next for me.
JK, I got my neodymium magnets from Parts-Express. In fact they are so strong that it was hard to pull them apart. Also, they attach very securely to iron screws and it is not always necessary to have them on both the baffle and grill.