JBL Arena X 12" Single Voice Coil, 2-Ohm subwoofer. It is truly a beast of a sub and can hold its own against the best in its class. Includes original trim ring, as pictured. I've only been using this sub for a couple of months, but I had to choose between keeping this and one of my old favorite Infinity Kappa subs, and I just can't let go of the Infinity.
eBay