Speaker Dimple

Used and not so sticky Scotch tape - try something not sticky at all first and gradually work at it using scotch that is newer or stickier until you can just get enough stick to pop it out.

Don't start with duct tape or something powerful as you may damage it. As far as audible - for sure this kind of thing is audible as you will get breakup modes that you normally would not see in a proper dome. It would sound like digital hash. As anyone who has pushed in a ping pong ball can attest to - once you break the spherical shape it loses strength/rigidity.

I've used the tape and vacuum methods over the years. For me, vacuum was easiest. As Elizabeth stated, just get close, don't touch the speaker dome. Use a guard of some type or rest your arm against the face of the speaker, hold the vacuum nozzle firmly in both hands and gently move the nozzle toward the dome. Don't get too close or you are going to have difficulty controlling the nozzle and you may end up causing more damage that you originally had on the dome!

BTW, it might help for you to practice first without the vacuum turned on. You can also just practice on any other surface with the vacuum tunred on so you will know at what distance the vacuum pressure becomes difficult to control.

Enjoy,

TIC

Use a guard of some type or rest your arm against the face of the speaker, hold the vacuum nozzle firmly in both hands and gently move the nozzle toward the dome. Don't get too close or you are going to have difficulty controlling the nozzle

I read about that method in Dr Comfort's "Joy of Audio" - never tried it though ;-)