building a 7 cu ft box for a 18" ssd tuned to 32hz. i was thinking like 110 sq in of port area and was wondering how much and how i should brace it, and if i need to double baffle it or anything. this is my first box bigger than a 15
I would add as much bracing as possible, and a double baffle would never hurt. Honestly you might not have a problem because of the power you would be giving it, but better to add too much than not enough.