Having a single cab short bed i have had trouble finding a sub box that works for me. I like a lot of bass so i wanted to use JL AUDIO 13TW5 shallow mount subs. So i decided to design my sub box i drafted the sub box to JL AUDIO recommended specs. It can house two 13TW5 which will fit behind the seats. In the center of the box i left space so i could mount two amplifiers one for the highs and the other for the lows. I used rockford fosgate sincle i plan to use their amplifiers. I just wanted to share these drawing with all of you so u can build it for yourself and modify to fit your application. i can email them in PDF format if someone needs them.