Sub forward(sealed off) ports through rear deck?

[Kybasshead75]

I have an 07 Civic SI coupe thinking sub forward ports through rear deck sealed off from trunk would be my best bet. I'm sure loading the corners and glass on the rear deck will help and sub forward means less rattles.
Got about 4.5cubes to work with net and using 3-4" aeroports flared out and out of box through rear deck loading onto back glass.
Has anyone had experience with this setup in a coupe car before all responses appreciated thank you!

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