Re: (Probably Stupid) Thiele-Small Specification Question
You might want to consider learning a bit more before designing/building your own enclosure if this has you tripped up. But the net volume is after sub/bracing/port displacements are subtracted. The gross volume is prior to displacements being subtracted. Every manufacturer's recommendation that I've ever seen is a net volume. And, generally, the manufacturer is recommending the smallest possible size. Most subs like much more than the recommended. And, fyi, this is not a t/s question.... I was directed to the pro designers on this site after attempting this myself when I knew nothing about the subject. They were right to do it, so I'll do the same. Hit up a pro, man.
Front stage: Phd FB 6.1PRO KIT, Active
Sub stage: 1st gen RE XXX 12" w/Fi recone
Highs Amp: Kenwood Excelon XR-4S
Lows Amp: Mmats D300hc
The Rest: AT 60 mil, Optima Redtop underhood and Yellowtop in trunk, Big 3 and front to rear +/- runs in Monster Cable 1/0