I got a 2007 tbss with the bose nav. Im looking to add some quality stuff instead of what I have now. I currently have an audiophipe 1500 a power acoustic 12 in a 2cubic feet box tuned to 32 hrtz and a c2i to drive it. I put a list of things together of some stuff and want to know what you guys think. Crescendo Audio BC2000D, ZCON 12, XS Power D3400 12V AGM Battery with the BIG 3. I want to keep the factory nav so what else would i need to get the most out of this setup? Also with my current setup i used the smd dd-1. After it is set distortion free I cant add not one notch of bass on the head unit. It just sound like it should be louder because a friend of mine have the same amp in his denali and its louder. Please help.

First off the DD1 is a joke. Second the gear you are looking at is all quality stuff.

So what should I use to hook this up to the factory nav to get all the bass out of my system?

Also who makes a good box for this sub?