Ported Box help!!

[DangerCDV 10+ year member]

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I have made a ported box just over 1 cubic foot. This is for a 400rms, 10 inch sub.

For a 2.5 inch wide pipe, I need 11 inches long for a 32 hz tune. IS IT OKAY TO USE 2 PORTS? and what type of pipe do I get?

Can I just run to home depot, find a strong looking 2.5inch wide pipe, and go from there? and are 2 ports okay to use, even if there the same length?

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[DangerCDV 10+ year member]

Well, I have all the wood and pipe now.

Iv decided to go with a single 2 inch pvc pipe in each box.

Building starts tomorrow