I have had these subs for over a year now, and I can't tell the difference in power or quality since the first day that I hooked them up. If you are looking at getting some subs that will absolutely blast for a long time, I would highly recommend these. If you have a little bit more money and want superior quality (minus some spl) I would recommend that you get the JL12W7. Please comment on this topic if anyone thinks otherwise. Thanx.
Great subs. Not a great sounding sub, but they hit like crazy and will take all the power and abuse you can give them. They are power hungry. The new 06 version changed a little from the 04-05 series. Little bit more throw, less mms, and a little lower resonant freq. The 12w7 is a pretty good sub, over priced in my opinion for what you get. Just my two cents.