Mechanically yes, thermally... not so much. If you want to get picky, the size of the box will be more of a determinate of mechanical power handling than which box type. Of course, also speaking in terms of vented systems and mechanical limits, this would be even more complicated by the fact it would be frequency dependant. So generally when someone asks this type of question, I assume we are talking about thermal limits. If you want to complicate that issue, lets talk square waves. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif