I cannot find anything for the box requirements for any of the woofers, it'd be nice if you could post all of them up

Thanks!

It's fairly consistent regardless of the model in our line :

8s = 0.5 cubes ported / 0.25 cubes sealed

10s = 1.0 - 1.5 cubes ported / 0.5 to 1.0 sealed

12s = 1.5 - 2.0 cubes ported / 1.0 to 1.25 sealed

15s = 3.0 - 4.0 cubes ported / 2.0 to 2.5 sealed

18s = 4.0 - 5.0 cubes ported / 3.0 to 3.5 sealed

Ball-park figures that will work most of the time for you. the Nightshade and Z v.2 woofers don't really lean towards sealed but the SA line does work fine sealed.

It's fairly consistent regardless of the model in our line :

8s = 0.5 cubes ported / 0.25 cubes sealed

10s = 1.0 - 1.5 cubes ported / 0.5 to 1.0 sealed

12s = 1.5 - 2.0 cubes ported / 1.0 to 1.25 sealed

15s = 3.0 - 4.0 cubes ported / 2.0 to 2.5 sealed

18s = 4.0 - 5.0 cubes ported / 3.0 to 3.5 sealed

Ball-park figures that will work most of the time for you. the Nightshade and Z v.2 woofers don't really lean towards sealed but the SA line does work fine sealed.

on the ported sa-8 how long and wide should a round port be?

It's fairly consistent regardless of the model in our line :

8s = 0.5 cubes ported / 0.25 cubes sealed

10s = 1.0 - 1.5 cubes ported / 0.5 to 1.0 sealed

12s = 1.5 - 2.0 cubes ported / 1.0 to 1.25 sealed

15s = 3.0 - 4.0 cubes ported / 2.0 to 2.5 sealed

18s = 4.0 - 5.0 cubes ported / 3.0 to 3.5 sealed

Ball-park figures that will work most of the time for you. the Nightshade and Z v.2 woofers don't really lean towards sealed but the SA line does work fine sealed.

on the ported sa-8 how long and wide should a round port be?

Depends on the box volume and tuned frequency. Make a new thread under SPL & SQ / Fabrication