I agree. I couldn't hear it at all, and I just didn't feel that those two little speakers were giving me the most bang for my buck for all the airspace dedicated to the factory sub box.
I just installed a JL audio custom sub from crutchfield (the thing is HUGE, much taller than it looks in the picture below, when standing on the ground the top is waist high.) It uses up all the air space and hits like a teenagers lowered civic in front of 7-11. It's completely stealth as well and fits perfectly in the factory location. I don't drive around bumping beats like a highschooler, but I certainly could with this new sub, and it's nice to feel the bass in my lower back when listening at low volumes. I also like knowing that the bass is there in case I do want to revisit highschool for a song or two, and when I crank it up it thumps like you couldn't believe. All in all, I give it 5 stars; it completely exceeds my expectations. I replaced the factory amp too (actually the whole system) so that helps too of course...
Here's the sub:
http://www.crutchfield.com/p_1369428...+x5+sub&tp=113
It's awesome!