As the title states I am thinking about adding a little more oomph... Right now I have a 10" Diamond audio sub. What's the biggest sub anyone has put in a roadster? I'm wondering if a box could be built in the tire well big enough to be ported. I listen mainly to rock but every so often I like to get some hip-hop in there to get the subs banging. No matter what I'm listening to I like A LOT of bass. What I'm basically looking for is a sub that will hit hard and low.