I've heard an IB setup as you've described and I think it works very well!
When playing into the back of the seat you will, in some cases, get compounding due to the rigidity of the seat the close proximity of the cone.
In my IB setup I have removed the steel out of the back seat and replaced it with speaker grille to eliminate this issue.
The only issue I have now is I can still pump the seat against the latches that lock them in position. So… I normally will not latch my rear seat to avoid this issue.
I think turning the subs around and/or letting them breathe through the rear deck works much better with less effort.
Raise Fs ?? From reduced volume... maybe after you have stuffed the trunk to the point nothing else will fit.
When playing into the back of the seat you will, in some cases, get compounding due to the rigidity of the seat the close proximity of the cone.
In my IB setup I have removed the steel out of the back seat and replaced it with speaker grille to eliminate this issue.
The only issue I have now is I can still pump the seat against the latches that lock them in position. So… I normally will not latch my rear seat to avoid this issue.
I think turning the subs around and/or letting them breathe through the rear deck works much better with less effort.
Raise Fs ?? From reduced volume... maybe after you have stuffed the trunk to the point nothing else will fit.