Fixing a dent in a whoffer cone

Don't know what your woofer cone looks like but there are some possibilities - I'd probably try putting a piece of lightly adhesive tape on the dented portion and gently pulling it out. As an alternative you can try a vacumn cleaner hose, BUT just don't get that sucker too close to the cone or you'll destroy it. Turn the VC on then start approaching the cone slowly. Remember if the cone should pop out suddenly if the hose is too close it will be sucked tight to the hose. Not good! Come to think about it, perhaps that method is only for the brave or foolish.

Perhaps if you could ID the woofer you might get something from someone who has one and has done this. Good luck.

The simplest remedy would be to push the other one in so they match. On secong thought, perhaps you should wait for some better advice. My boy pushed in a 15 inch JBL2225 and I've tried everything to fix it...no luck yet. I am eager to see what other people have to say.

Adhesive tape works for mild dent. But, generally, a dented dustcap in the center of the woofer does no harm so it is probably better to ignore it.

Is the dent in the cone or the dustcover at the center of the cone?

Another alternative is to "french kiss" the cone. Not just another way to get close to your system, but by gently sucking while puckering your lips against the cone you can work it back out.
Just don't let your spouse catch you doing it. She will undoubtedly grow jealous and never let you have private listening sessions alone anymore.