sub hole size???

[Sweet 0]

i want my ported box to be 2 cubic feet i want it tuned to 34hz so far i have 30Wx14Hx?D

I cant figure out with a box calculator what my depth is, if i put it at 13.5 i get 21 square area for the port but if i put it at 14 i get 19 square area. so my question is what should my depth be for a box that is 30 w x 14 h so i have 21 square area port

sounds confusing sorry.

[Sweet 0]

nevermind i got it

but one more question since my sub isn't here what size is the hole i need to cut for the sub 12"

[SoundSplinter 1]

The mounting cutout for the RL-p12 is 281.4mm (11.08")

[Slumpin 0]

i got mine in ok, and i'm pretty sure they are airtight, but i was wondering if there is an easier way to cut out a speaker hole? what i did was set the speakers upside down on the box where i wanted them, draw the outline, mark where the screwholes would be, then connected them with lines.

at the x in the center, i nailed down a craftsman circle hole guide, and used a craftsman professional scrolling jigsaw. i dont have a compass that will go out that far, so i measured 5.5 inches from the center and marked it every half inch or so to have something to guide me. when i finished, they werent perfect circles, but where close enough i fixed them up with a small dremel drum attachment. surely there is a more accurate way?

[ANeonRider 3]

Ya... a router w/circle jig.