This is not just a simple question. Since I am in the car audio field I will say this. There are drivers on the market that will give you better bass. But getting good or great sound is more then just putting in a different driver. Altough it is a start, keep in mind! It is about equipment, power, & acoustics, and for bass...proper volume that the woofer are in is essential.

Having said this take a look at the following site: www.focal-america.com

Although Chrysler states there audio system is 240 watts I am sure that is a peak rating......as apposed to RMS.

Since I just purchased my crossfire I have not checked out the woofer cabnet behind the seats but I am sure I will.

The one thing I can say about the factory sound system for the position of the front speakers it has a good sound stage, and I agree that the woofers are weak. But what factory system is ever like your home or custom sound system......None of them.

Regards