It is a 12, but as best I can tell, Redford's right; The motor isn't that of a 9 series; I snagged a few pics from DDAudio.com, and distorted them in Photoshop to the closest perspective I could muster; And the curve on the magnet of the 9 series is much less agressive than that of this sub; So surely it's of a lesser variety.
16 hours left at the time of posting. If you look at the bid history, you'll notice some kid with bad feedback inched up to my bid five dollars at a time : ) So keep that in mind if you plan to bid; I'd snipe it; The seller also has some other noteworthy items for sale, including Crossfire amps.