This is a ported downfiring enclosure for a pair of JL Audio 10w3v3-4 subs. This is made for a 2014 Jeep Wrangler, the downfiring enclosures work great with the open top environment to help direct the sound to the listener and keep the subwoofers hidden from the view of people walking by. 
 
Made to JL Audio spec for the 10w3v3 of 2.25 cubic feet total air displacement after port and subwoofer displacement are figured in. Port is 2" x 12.5" x 26" long for tuned frequency of 31.5hz as called for in JL Audios manual.

External Dimensions: 40" wide, 13" tall, and 16.5" deep. Terminal plate area will be recessed in the drivers side and come with terminal plates prewired for your subwoofers, one plate for each subwoofer. Port is downfiring on the passengers side.