Loudest setup for in the cabin build?

[I Like Waffle]

Im looking at doing a below the window line build in the backseat of my car, box will be extending from rear of trunk into cabin with 4 15"s ported, about 16cf.

What im trying to figure out is what the best placement for the subs and port would be, im thinking sub up port up would be the loudest? Ive done trunk wall setups before with 2 subs and port in the middle, but that isnt really an option with 4 15s below the window.

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[I Like Waffle]

I know someone has done this, itd be pretty much the same as ext cab truck i assume, what works best in those?

 

[keep_hope_alive Premium Member]

subs and port as close to the rear windshield as possible - load them off the rear glass - hatchback style. maybe even eliminate the rear deck so you can get them where the rear deck was.

face them forward behind the seats and you'll get more cancellation.

 

[thevic24 5,000+ posts]

subs and port as close to the rear windshield as possible - load them off the rear glass - hatchback style. maybe even eliminate the rear deck so you can get them where the rear deck was.
face them forward behind the seats and you'll get more cancellation.

This.

At least try to give the port some loading if you cant get the subs where you need them.