Wait till you get the subs in, and set them in the holes..Im betting that will be too small/have a gap around the sub/speaker.If so, easiest thing would be to go to Lowes/Home Depot, and go to the precut wood section, and find a small piece to cover the to cover the speaker holes up with, or take the measuremets of the face of the box, and the center of the opening, and get them to cut it out,or sometimes you can go to school in town and get one of the kids in the work shop do it for free...I use to bring stuff to school in the Mechanics/Carpenter shop, and they would cut it out /weld, ect.I got alot of stuff dome free that way,and even the Kids enjoyed seeing me come up there, as I always had some new project going on of some sort.Just a suggestion, if you do not have the tools/ to do.