For what it is worth my recent experience of upgrading the stereo in our Boxster led me, in utter frustration after changing out head unit and all speakers, to try an under-seat subwoofer.
In terms of bang for bucks and obvious improvement it was miles more obvious an improvement over everything else and left me wishing I had tried it out first.
Here is a link to a recent review
https://www.10tenmag.com/under-seat-subwoofer/
In terms of bang for bucks and obvious improvement it was miles more obvious an improvement over everything else and left me wishing I had tried it out first.
Here is a link to a recent review
https://www.10tenmag.com/under-seat-subwoofer/