Is there any real advantage to that? In other words, why do some people mount the sub facing in and thus the magnet out? I'd thought about flipping two of my 12"s around 'cuz to me it does kind of look neat, but wouldn't it hurt the performance of a sub? Especially one designed for a sealed enclosure??
I've done it. It sounds the same... maybe a little different just because of the box tuning changes slightly, but most people can't tell. You also don't have to take subwoofer displacemnt into account (box building) when you invert the sub. Plus, you get a nice look at the motor when you do it that way.
i also if its a new unresined box you can be sure you dont get sawdust where it shouldnt be, other than that its mostly for looks and so you dont have to account for displacement, thats why i do it sometimes at least
it wont make any difference at all sealed, it takes about .5 cu/ft or larger to noticable change the effect of a sealed enclosure but ported it will change the tuning of you enclosure which might change the sound a little. Read what Rovin posted its some good stuff, also check out www.bcae1.com