Here's a couple pics of the design, 2.56 ft^3 tuned to 36hz w/45 sq inches of port area for two 10" Alphas:
My question is regarding the port length, i need it to be 31" long to tune to 36hz.
I've read you should start the port length halfway down the flare (flare radius = 3.5"), and then add on 1/2 the port width (3") if your port shares a wall with the box.
Does this picture look correct with regards to port length (the dashed line).
I also wasn't sure if the inside flare affected port length as well...
Thanks in advance for the help, this will be my first time doing a flare, and my first time doing a labyrinth type port.