Fi BL 15" Box Design

[Maddenkid2011 3]

Do they just help durability? And will i just have to lengthen the port length to make up for the 45's area?

I would suggest finding a way to make them.

I guess i'll have to lol

How do i figure out how the tuning will be affected?

Figure you net volume and plug it into a calculator and see what it is.. If you want it to be tuned a little higher, take a inch or two off of the port then. Now recalculate the net volume (will be larger than before), and plug it into a calculator. If its tuned too high for your liking, do the same process, just take off less port length in the beginning

Alright, now do u think (1) 48x96 sheet will suffice?