alpine's site says .6-1.25 for sealed so what do I use? want good deep base. going in a friends suv so there is a little room could go 1.25 but I was thinking 1.003 thats .80 plus .123 (displacement) plus 10% of .80(was told and have always added 10% for "dead air" in the corners). What do you guys think???Glasswolf?? Johnathan? anyone your help appreciated