Summary: Stop researching because you have found the best sub for its price. This sub is much better than any other sub I have purchased. I am using it with a 1500 watt amp in my Honda Civic, and it overpowers my car. I've spent almost $30 on soundproof foam just to keep the sub from rattling my whole car. Definite buy for anyone.
Summary: I put these in my 20 year old stereo speaker in my house. They sound great, especially for the price. It was a pretty easy install. I stripped the wires and put them in the clamps on the back of the speakers. I needed to file out the hole in box about a 1/4 inch but that only took about 20 minutes each. Lastly, I drilled pilot holes for the mounting screws and screwed it together. I was a little afraid that this install would be more difficult then it was.