Help with Box specs

[CaviHitts 10+ year member]

I have a box that I've actually been using for a while now that I got when I bought my subs. I bought it from car audio dealer, not a big box store like Best Buy. Its prefab for me as in I didn't build it but the installer said it was built to spec from TREO. I am trying to get the specs and most importantly trying to figure out what it is tuned to. I didn't think to ask when I bought and honestly didn't really care to bother with it until now.

The subs: 2 TREO SSi 12.44s

The box is a slot ported box with 1 single port in the middle.

The dimesions are:

Width : 34.25"

Height : 13.75"

Depth : 17.5"

Wood thickness : .75"

Again 1 singe slot port in the middle with the port dimensions of:

Width : 3.5"

Height : 12"

Depth: 14.75"

The woofer displacement according to TREO's site is .096ft3 each so .192ft3

I used http://www.the12volt.com's box calc and got volume of 3.7147 before displacement and 3.523 after.

I have no idea how to get the tuning frequency. Can anyone verify the above and help with the tunning freq?

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