Anyone know where I can purchase a box with a sub to put behind my backseat of my crew cab?? I do not want to do any kind of custom system. I want to keep it simple and just have a little thump of bass in my truck..

 

Move into the factory Audiophile system. Look for an OEM one on eBay or some other classifieds posting.

 

I think you can get one from JL Audio tooo.

 

I have my Audiophile amp/sub collecting dust in the closet. Mine is out of an 08 supercab.

 

I already changed the interior speakers, the head unit, and added an amp. I will most likely just make an enclosure to house a 10 or 12" sub.

 

Awesome! I was lazy. Since mine had the Audiophile speakers, I just pulled the amp/woofer out and installed an MTX Thunderform box with 10" Rockford Fosgate shallow mount subs and an Alpine PDX-1000 amplifier and it sounds really good to me.