Speaker Dimple

Appreciate the responds. Guess I'll try to vacuum method this weekend.

One other suggestion, in case the tape or vacuum methods don't work but you really want to get rid of the dimple: get the smallest sewing needle you can find and carefully pierce the area of the dimple with the very tip. Angle the needle about 45 degrees to the surface of the dome and very carefully pull the dimpled area outward. Then heat the dome with a hair dryer on the low setting to finish the job.

Be very careful with hair dryer method.

I had to remove a dome driver from Dynaudio in the past because the driver is glued on the cabinet. If silk dome is heated up too much, it will deform. Looking from side, you will not see a perfectly round circle. Like heat shrink, you will have area that are recessed after heating up.

Fortunately I was taking out bad drivers, but I wished Dynaudio would have warned me ahead of time in case I was dealing with new driver.