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