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2014 Toyota Avalon Limited
608 Posts
The biggest issue with prefab ported boxes is they’re tuned way too high (about 40Hz)… unless you like that type of sound. Do you have the ability to cut a hole for some PVC pipe perhaps? I’ve had very good luck in the past getting a slightly larger sealed box, then cutting some holes for some PVC pipe to tune it to about 30-32Hz.

By the looks of the box mentioned above you could cut a hole or 2 for some 3” or 4” PVC with a hole saw on the long “leg” side.
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