lol...you told the OP in another thread about an xs-12 to order one from Earmark, you might want to take your own advice
I assume your asking because of my comment? You mentioned sub displacement, but what about port displacement?
http://www.wakeworld.com/forum/showthread.php?t=793428
Here's the actual specs. Based on the T/S parameters the EBP is 54, so may be better sealed, but would need a larger box to perform OPTIMUM
Actual specs
Volume- 1.626^ft
Vb- 1.508^ft
Lv- 12.5"
Dv- 3"
Fb- 29hz