Stevie, the pry bar and lever guy had a good idea. I would start with an ice pick and see if you can break the seal of the adhesive by scoring around the perimeter of the tweeter's outer edge. Another idea is a paint can opener they give you for free at the paint store. Once you get enough goop cleared to get a good(purchase),that little end, not the beer bottle opener, just might give you enough pull power to get the tweeter out. If you use the ice pick in any way put your free thumb over it for the safety factor, in case you slip. I learned the hard way ....Mark Korda