I'm looking for a little more bass. I have upgraded the head unit, amp, and speakers in the front of my truck, still running the factory sub. I have 2-channels of my amp available for a subwoofer and would like some input on what to do. Believe it or not the factory rear speakers sound good with the new amplification and the factory 6" subwoofer is better but I want just a little more. Where can I get an enclosure to fit where the factory sub sets? I have a crew cab and a power sliding rear glass. Again, a 10" will more than likely suit my needs, I just need a box.