cones pushed in speakers, can i push out again?

The center of the cone is called a "dust cap" to keep dust and particles out of the voice coil. Having them pushed in forutnately does not effect the operation or sound quality of the speaker. However, if it is a problem for you visually there isn't much you can do but maybe try to carefully use tape to essentially pull out the dimple in the dust cap

Robo
November 2007