my theory may be sloppy and wrong - but here it goes when people start talking about speakers and thier enclosures there are generally two types used, ported and sealed. sealed being just that, and airtight box with a speaker in it. but a ported box is far from air tight instead they put a hole in a box so that when the speaker travels out it can suck air in and when the speaker travels in it pushes air out( HERE for a pic of a ported box). now here is my question. if the speaker pushes out a compression, then technically wouldn't a a rarfacation be pulled in at the same time, causing there to be canceling/distorting of a wave (at least in theory)? but i know for a fact it is no cancled these boxes are know to be louder, why?