so i designed a box for my fi q 18. its 7.1 cu f before displacement which is .25 or something close to that. this is going to be a sub up port back setup.
using 3/4 inch mdf
dimensions
34 width 14 height 32 deep (inches)
Port
6 wide 12.5 high 24 long (inches) port area is 75" is that a good number. and i feel like 6 inches wide is really big. will i be ok? Someone told me i should have at least 80^2 of port area but to achieve that my port has to be 6.5 inches wide and i feel like 6 is already to big so i thought i'd ask.
alternate Port with *81^2
6.5 wide 12.5 high 26.35 long
also do you think i need internal bracing? if so where, how, and what kind?