You have to factor in all open space when buying a sub pal. I'm not trying to discourage you, I'm trying to educate you so that you aren't buying a product that wont work for you.
I have replaced my 12 inch, 150W RMS, Sonance "The Sub" because after 3.5 years, it blew. I hooked up and tested my 12 inch, 250W RMS, PL-200 and WOW!!!!!! This thing rocks!!!!! When I first got my Sonance sub, I remember testing the sub with Star Wars III at the beginning. I did the same with this sub. I can't get over the amount of sound this thing puts out. My wife said that dishes in our kitchen were shaking (Our kitchen is downstairs below the 12 X 15 X 8 theater room). I have the sub firing through a cut out in the wall from inside a small equipment room. The equipment room is about 5 X 6 X 8. With the sub up near full power, my ears were hurting/uncomfortable inside the equipment room. This sub moves a lot of air. With the door closed, it was even rattling the door. I never got this kind of sound from my more expensive Sonance sub. I pushed this sub far and loud and never heard a hint of any issues like cracking. 25%-40% power is all I plan on using, except when I want to impress friends. I always thought my Sonance sub was nice, but I'd rate this sub much, much higher. This is my first BIC purchase, so the next big question is longevity. I'm hoping for a very long life. My Sonance "The Sub" retailed for $1200 and could be found for the $650 range new. Sonance offers a lifetime warranty, but I did not purchase it from a dealer, but from Ebay. The PL-200 has an 8 year warranty, but was only $270 shipped and it blows away the Sonance sub.
If you are in the market for a new or improved sub, buy the PL-200. You won't regret it. ...........I wish I was getting commisions on sales. I plan on telling everyone how good this sub is.