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Message: <blockquote data-quote="jimmyjames1700" data-source="post: 1579707" data-attributes="member: 558886">is that 2 cubic feet net, like after port and sub displacement, or total?  If you it is net, minus sub displacement and assuming you are using 1/4" sched 40 PVC, you will be tuned at 48.22Hz.  That number will go up after mounting a sub in the enclosure unless you plan to invert.  I hope that is in the neighborhood of where you wanted to be.Also keep in mind, tuning will drop considerably after loading and it is interacting with it's surroundings.  Must designers tune about 10-13% high purposely to compensate for this.  Check JL's website if you are ever curious about this.  If you run the numbers for their recommended vented boxes for any of there subs, you will find that what you calculated is a lot higher than what the web site says you will be tuned at.</blockquote>

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