Problem is that you are effectively locating your subwoofer outside of the vehicle, which makes it loud for people near you, but quiet for you. (the reverse of what you want) The premium sound subwoofer locates in one of the side wells in the trunk, that should work even with kids in the back. If you need a bigger subwoofer than that, I recommend one on quick disconnects that can be removed when the kids are in the car so as to leave room for their seats (and not to damage their hearing.)