Subwoofer change on B&O
 

I can only say that changing the subwoofer in the car with another doesn't do anything to make the stereo sound and better. An amp and a box in the truck is the way to go. I also found it very easy to plug back the stock woofer if I need the extra trunk space or track day racing. Kenwood Exelon and Kicker ported 12" is the way to go. Many comments on what Did I do to make it sound so wonderful. Also don't forget to change the audio gain in boot menu. Now putting out 1350 watts and it fits the car for sure. Next up Dynamat to stop the vibes.

Please post some pics. Espeically the dynamat to stop vibrations, its driving me nuts.

I respectfully disagree. The Pioneer Champion 10" sub has improved the sound in my car dramatically. The stock B&O sub is damn near useless. The Pioneer on the other hand has bass I can hear and feel, while not taking up much room.

depends on the sub and if its done right

I think the stock woofer is more than adequate if not
 

too bassy to begin with. I generally turn the bass down anyway. Loss of high frequency sensitivity with age generally means I jack up the midrange. Can't hear the treble either.