I just put some new polk component and some polk 6x8's speakers in my 3 over the weekend and noticed that I get a lot of sound but hardly any bass. So i started looking into some subs and picked out some nice 12" alpine type-E and a pretty good 500watt amp. However my question is do i have to get a new deck for my 3 for the subs/amp or can i run it without. And if i were to run it with out a new deck would it sound crappy?