Dean has an excellent idea in listening to the speakers, IF any weird sounds are heard, then swapping the driver(s) into an M60 to see if the weird sound follows the driver(s). (Dean, good one :o) ). If they sound fine and it is the center dome dust cover that is pushed in a bit, you can use the patented Ken method. You take a vacuum cleaner and VERY CAREFULLY use the suction to pull the dent out. I would only try this if you have a way to reduce the vacuum at the end of the nozzle significantly lower than normal, GENTLY approach surface of dust cap until it JUST makes contact. If more suction is needed, increase suction a little bit at a time, until enough to pop dent out (but not enough to damage the speaker.
This is JUST A COSMETIC fix. The dent in a dome should not impair the speaker's sound quality. If you are (whacked) like me, you'll risk ruining a speaker to repair a visual only blemish.
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