well we cant tell about the box he showed u unless we demetions. so i could say buy it they fit. but u can buy a peace of 3/4 mdf for about $50 if that i think i got mine for $30 at my local lows. then all u need is some wood glue, screws, ect. and the dementions best for those subs, which u can find at alpine.com its not hard at all, and u will like it much better. because u made it.