heatsink101- how old is the speaker? Any chance that it's under warranty?
Also, who installed the system? If the amp's input level controls are cranked up, that's what really caused the problem. Setting these correctly means you should NEVER reach the level of distortion that may have killed your woofer. However, it's possible that the amp can output more power than the speaker can handle, so it would be best for the future longevity of the system that you make sure the system is dialed in so it's not overpowering the speakers.