Alright so I am trying to build a box for a Fi Car audio Q 12" woofer.

They recommend I build a box using 1.8-2.5 cubic feet @ 28-33Hz (32hz tuning is optimal, and has the most output and is still the most musical daily driving), and to use 12-16 square inches of vent area per cubic foot of volume.

I am talking to Chris at fishercustoms, and he is helping me design a box. I was using the RE Enclosure Calculator, and I'm not sure what he uses.

I gave him my max specs, 23" long x 15.5" wide x 16" high, and he came up with:

1.8 cu ft, 33 hz, 1.74" x 14" port ( 13.53 sq in vent area per cu ft)

When i put those dimensions into the RE ported enclosure Calculator, i got:

2.068 cu ft, 31 hz, 1.74" x 14" port ( 11.79 sq in vent area per cu ft)

His port size keeps his idea that a 1" to 8" port ratio is optimal


Now I am wondering if the RE enclosure calculator is correct or his? 1.8 cu ft seems so small with those large of dimensions. I trust his port calculations, but if that ratio is wrong, put your two cents in on what you feel is right.

If the RE port calculator is correct, then the port size is way to small.


Let me know what all of you think.

 

i was looking and found a website that looks good and fair price's
http://www.mobilesoundworks.com/Prod...F0%2Dmsw%2D112

 

The RF calculator does work... my friend has built boxes for him and myself (for RF subs) and it was right on the money.