I'm sure one of you guys had the door cards off and the speakers looked pretty decent, good material and not some flimsy paper effort. It could also be that the front and rear speakers are cancelling each other out, could be worth turning the rears right down and see if the perceived bass from the fronts improves.
Can't understand how a Sony branded system can sound worse than a standard Ford system and whoever makes it!
Unfortunately not the best pic bit it did look reasonable. had a decent size magnet at the rear and the cone was plastic rather than the cheaper paper.