I have 2 infinity Kappa Perfect 10.1 Subwoofer. One of the cones got a crack that goes about 1/4 of the way around the subwoffer dustcap. I apoxied this back together and it still bumps like before. Have pictures on my signuture just click on my cardomain site to see. I also have another one that has a small dent but no puncture to the cone and still bumps like new. They were both hooked up to alpine mrv-t420 amps(350rms). I am wanting to trade both of these subs if someone will build me a custom box to specs and carpeted 1.0cf for my Infinity Kappa Perfect 12. Prefer people who have expierence and box build photos so i can see your craftsmanship.