Have you seen the new Kicker line up? They have a new line called Solo X. It has an 18" sub that has 5,000 watts RMS, 10,000 watts peak. This thing weighs 100 pounds. Even their 10" and 12" are 2,500 watts RMS, 5,000 peak. That is insane! It says on their site that many cars interiors have buckled because of the pressure that it puts out. That's just too much.

they've been around.. its pretty bad subs.