Any one know if you can just swap out the factory sub woffer for a better one. Any need of an amp or any thing else?

 

It would be best to amp it and put it in it's own enclosure. If you dig out the sub, you'll notice it's very slim and only has small speaker wire going to it. Plus, the enclosure it's in is thin sheet metal and has tons of volume. Not good for a low displacement subwoofer.

 

Not to mention that subs probably only getting 30watts, if even that.

 

I would really lke to keep the stock location. Any way to utalize it to its fullest extent?
Also would different speakers make any difference if I keep the origional Head Unit?

 

Anything is possible with enough money. I have no idea where the sub is, but that doesn't really matter. It would take a lot of custom fabbing and a lot of work, but it's possible. Would I recommend it definitely not. I have plenty of trunk space with a single sub, and a smart layout. Unless your rich and wouldn't mind dropping a few hundred on that then yea someone can do something like that for you sure.

 

The sub is located right between the two speakers behind the rear seats. (Under the rear windshield) The only concern I have is not blocking the 60/40 seats because my gun and guitar cases are to long for just the trunk or just the back seat. So I would like to keep it on the rear deck where it is but the stock one sounds horrible.

 

Assuming that sub is set up in an infinite baffle, than it may actually be easier than I thought to replace the sub. If you can see the back of the sub in the trunk, and the front from the inside it is setup for IB. Correct me if I'm wrong but a W1 is compatible with an IB setup. I forget how to read the stats to see if it can do IB, so I have to find the online calculator.

EDIT: This is a long shot though, I'm sure there is something that will make this complicated but there is potential it's sort of easy. Below is a link to info on IB setups, IB is the most complicated setup.

http://home.comcast.net/~infinitelybaffled/