I plan on making a new sub for my audio. I plan on using an adire audio tempest. What would be a good box for that sub. I do 50/50 ht and audio. How big should the box be. I can make a pretty big box. If possible i would like the thing to get low. All i need someone that has tried this before. Tell me how much the box should be after displacement and the tuning freq. Thanks so much.