I made this enclosure for a single 10" subwoofer. It is designed based on a 10w6 suggested enclosure and I made a few adjustments to the enclosure to feature a countersunk subwoofer baffle, rounded over port end, and a long switchback style port to get the 31" long port to hide in the relatively small enclosure. 

External Dimensions:
13.75" Tall
19.5" Wide
11.5" Deep
9.125" Cutout diameter
11" Countersunk cutout diameter
0.75 Cubic Feet
38hz tuned port
1.125" x12.25" port 31" long

Enclosure pictured is made from 0.75" MDF and has Terminal Plates and Black Carpet.
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