What happens when you combine years of product design with ultimate material quality? The perfect sub box! Our dual 12" transmission series enclosure ideal for mid to high end subwoofers and features a patent pending vent design that simply cannot be found elsewhere. So what is so special about the port? If you were to cut open the enclosure you would notice a snake like shape that channels the airflow from the interior of the box outward. The purpose of this is to tune the frequency of the enclosure and also increases the back pressure to create the absolute maximum bass output! This baby is made from 3/4" MDF wood all around so you know it is one tough hard hitting bass machine! Our boxes are made from precision cuts of MDF. They are then liquid nailed, nailed and completely sealed. We then wrap them with high quality carpet that matches most vehicle interiors. All Boxes feature high grade spring loaded terminal cup(s) for the absolute best connection possible. All the custom series enclosures are made to fit precisely into your vehicle to the get the max performance from every extra inch of wasted space. We guarantee you will not only see a difference in the quality of the boxes we build, but you will hear the difference and that is what is it is truly all about.