I have 2 infinity kappa 12's in a sealed enclosure, about 3.1 cubes (not seperated). I want to port this box, but I dont have the tools to make a good hole thats like 4 inches in diameter. Can I do something like (4) 1 inch diameter ports, or 2 inch diameter ports? How do I know how long they have to be? Im hoping to tune to about 35hz.
Im doing this because I want to know how the ported box sounds, so when I build my new box for my new vehicle, i can decide between ported and sealed.