I haven't yet. I like it way it is now. Not sure if ill be able to notice a difference. If i do go inverted i wont be able to wire it the way it is now, so ill be sending less power. Would only be able to run at 2 ohms on one channel. the amp rates that at ~160 watts, compared to what i have now; rated at 100 watts per coil. If i mount the sub normal it would take even more power to get as loud because of the lack of volume, so i think ill keep it this way. I'm happy, why fix something that's not broken   It's within the recommended size for the 12, POSSIBLY a little on the larger side. The new X series call for .6-1.1 ft^3, this box is .93, so i'm golden  Hope i got your name right  This is true..  Thanks   Anything backwards seems weird that's the kewl part about in mang!!   As do i, thank you