Welcome to the SMD forum!
Hay bro do i saw a box build you made for one 15 zvx I think it was a 6th order and it was Rhino lined so the question I have is are some idea of your Dimensions mainly cubic feet for the Small side and large side And tunning frequencies of each and port area of small port and larg port. I am designing one myself I am using as of now 3 ft.² cubic small size 6 ft.² cubic large side (2) 3inch ports small side a 108 square inch port on the long side. 28hz small and 55hz large side. Any thoughts. I am using zvx v2 15 dual 1ohm
your box looked absolutely amazing by the way