Originally Posted by raptor660
But anyhow I was thinking about building a ported enclosure for my 2 15" JL W0'*
I think i like these dimensions
36 inches wide X 30 inches deep X 17 inches tall
with port dimensions of
3 inches tall X 34 inches wide X 22 inches deep
Which will give me 8.82 cu feet total. And a tuned frequency of 36.34
Should work about perfect for these subs
Let me know what u think.
When you're building a box, the important spec to pay attention to is net volume, not gross. Net volume is the final internal volume your speakers will "see". Gross volume is about as useful as the max power rating on an amp.
In order to give you any real help or suggestions I'd need to know what type of box you're building and it'* orientation, how much power you're going to be giving the subs and the sub specs. As for box, it'* obvious it'* a ported box so that'* not the answer i'm looking for. I mean are you doing a standard ported box w/subs and port on the baffle? Are the subs going to be firing up with the port coming out the bottom of the box and is that port firing out the back or the front?
When building a box that big and with subs that big, it would be a good idea to add some bracing to the box so it doesn't flex, that'* going to take up internal volume as well as the subs themselves so obviously that'* going to change your net volume and tuning. Also, you have to consider how many baffles you're going to have because that will effect your measurements and volume too. Double baffles are good for two things, being able to flush mount your subs and strengthening the baffle so it doesn't flex.
You also have to be aware of how many "common port walls" your box will have, that also affects tuning and volume. You have a long way to go before you're ready to start cutting and building. You really need to get sub specs so you can find out their displacement, calculate bracing displacement, rethink your specs. Let me know if you have any questions though, I got you