I appreciate the feedback. Thanks.
Free Air Sub, never heard of such a thing until now. I guess you could say it is free air in that it is not a totally sealed unit, there was a small gap at the top of my MDF. I ended up filling the cavity with some pink insulation which brought out the bass and in turn this sealed my gap at the top I mentioned.
I think it sounds great, it doesn't thump like the 12" in a box that I had, but it doesn't take up any room either and it is a 10". It has no problems hitting the lows and minimal to no rattles or vibrations.
It is a Rockford Fosgate P110S4 - 150W RMS with a Pioneer GM7200M 250W RMS feed off my Scion H/U.