I'm looking at inverting a sub to make my box lower and not deal with sub displacement. Does it matter how tall the enclosure is as long as the sub sees the correct amount of cubic space? My example would be lets say I have a sub that needs 2 cubic feet. If I built a box that was 2" tall but 40" wide x 40" long and the box came to 2 cubic feet, does the sub care if it's inverted? Is there a minimum amount of height that a sub needs even though it is inverted?