I've had a bit of a look around, but I haven't been able to quite lay my hands on the exact information i'm after.

I want to build an enclosure for my 9512 that's on its way.
Some testing with my 3512, in the Getz, at different angles reveals that sub and port firing straight at the ceiling seems to yield the best numbers.

To make the best use of the limited amount of space, if I can, I want to angle the rear of the box so that it will sit flush against back of the rear seats.

Having the port following the contour of the rear of the box, thus getting slightly wider as it goes in, is a real no-no right?

So instead, I have to make it so that it's more like a 'sleeve', so the rear of the port has a wall that is seperate to the back of the enclosure?
Will this lower output or have an effect on quality (it's SPL biased, but I still want it to sound good) due to some sort of turbulence?

Or should I just build a box with 90 degree angles, forget about that little bit of extra space gained and keep things simple? (Note: I'd rather do this than use an aeroport, if this is a suggested way to solve this dilema)

Hope this makes sense.

Port it on the rearward-facing wall of the box... that way you'd be using two straight sides and you can still port it upwards.

I get around 2.5dB higher with sub and port firing straight up, on the same face of the box, than I do with them on the front face or one on each (although, having the port firing up with the sub at the front does get within about .5dB).

is still firing upwards
use wedge for angled side so port is same
that way keep most volume

Aeroport is louder and will work better than the slot port. Sorry to say it

for some Slot Ports work better then aeros depends on the car, the box ect.

Aeros dont always yeild the best result.

but i reckon build just ya everyday regular box.

Hmmm.... I reckon i'll have to try an aero port or just use 'square' angles.
I don't really have the right tools on hand to cut at the required angles anyway.

I'll do some measuring as soon as I get some time.