So my Jaguar has most options (nav, voice guidance, factory phone, Xenons), but only the base stereo, which in itself is pretty good, better than the Alpine stereo I had in my '05 X-Type VDP IMHO. However it does lack a bit in the bass department. So my question is how can I bring a bit more low-end to the stereo whilst keeping it stock looking? Not interested in junk in the trunk etc. Can I add a sub amp and speakers in the trunk where the bass drivers would go on the rear parcel shelf in the Alpine edition (are there holes already there, is there wiring in the accessory bay for the Sub amp? Also how feasible is it to change the drivers in the doors some something better?

Thanks

- Tim