Hey guys need some help for a box for a Level 4 12". Im going to have 2 Lvl412's ported, giving them about 1200w each. On the DC site they recommend 1.5 cubes for Ported, and 2 cubes for SPL ported. I guess my first question is, is this measurement net or gross? Also, im kinda looking for a daily/spl setup, so would it be alright to go with 1.75 cubes per sub? And another thing i wasn't sure of, whats the recommended port tuning? for SPL or daily? Has anyone had a preference with these subs and has another recommendation? Thanks, Steven