just stupid software.Wow I do owe you...thanks man, your a life saver.....but being the dummy I am, I have a few more questions....why do they say to cut box left plate 15.25x12x15.25x12, why not just 15.25x12, like the top plate (LxW), why did they repeat it twice, same goes for the box right plate and the port 1. Also the cut angle is 90, that just means a normal straight across cut right. Whats the best material to use, I've been told 3/4 mdf, and other people say 3/4 plywood. I know you glue it together, but which is better, screwing it together, if so, (something like gyprock screws) or lots of brad nails...I'm sorry for being so dumb, but I just want to do it right the first time, and i'm new to all this..I really appreciate all your help!!!
3/4 mdf will work, 3/4 birth is best but it is expensive. It is lighter and a little more durable. I would also suggest doing a double maffle for the sub, that thing is heavy.
Use wood glue and construction silicone to make box airtight at the seems. Glue is what holds the box together, but nails/ screws will help holding it together.
pm me if you want any more help