oh i nearly forgot. yes i do have a sub but when i placed it in the boot is was nearly inaudible. pic of the sub is attached.
then i put it on the back seat and it was awesome
so i had to think of a place inside the cabin, and ended up putting it behind the passenger seat, facing the passenger seat, making the passenger feeling like he/she is in a street party
int he pic i had moved the front seat fully forward while working. when i moved the seat back, front legroom is sacrifised to say the least, but this is the price i have to pay.
of course, if i had know this beforehand, i would have made the face of the sub box slanting so as to win more space.
btw that is a sealed enclosure of 28 litres.
hope this helps