Port Suggestions

[ChanzSafari 10+ year member]

I am getting a box built for 4 Fi Bl18's in the back of a tahoe and was wondering which type of port should i do. The big square in the center of the box facing the rear hatch or several small holes? I am tuning it to around 32-36 hz. Any suggestions would be great.

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[dman4486 5,000+ posts]

port(s) to the rear.

 

[ChanzSafari 10+ year member]

I am facing them to the rear regardless, i was just wondering would one huge port or a couple decent size ones be better?