Subwoofer Box Built for the Below Listed woofers. Designed to optimize the performance of your  woofers. Built to last with quality in mind. These will outperform the standard prefab in sound and durability. 
2 Infinity Audio Kappa 8" Subwoofer Box
Outside Dimensions- 12H x 30W x 16D
Tuning- 34Hz
Net Volume- 1.85cuft
Construction- 3/4”  Birch
Baffle Thickness- 1.5"
Terminal Type- SMD 1 Channel Heavy Duty Speaker Terminal (Grade 8) (3/4" PVC Black) (Round)
Outside Finish- Bare Wood or Bedliner
Inside Finish- Bare Wood
FREE SHIPPING! LIFETIME WARRENTY! QUALITY GUARENTEE! 
****BUILT TIME- 2-6 WEEKS FROM TIME OF ORDER!*****
Enclosure is Based on Reccomended Manufature Specs
*May work for other 8" woofers, user caution advised*