Downfiring dual 15" ported box

[LoudCrownVic 5,000+ posts]

I have looked over my available space in my trunk, and looked at my box design and scrapped it. Would it be wise or even sane to build a downfiring ported box in a sealed trunk environment, about 40 cubic feet of airspace, in a 2.7cube per woofer box? What hight from the floor do the woofers have to be from the floor and where should the port be placed???

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