A black speaker cone in a wooden setting. The central part of the cone is inverted instead of forming a smooth spherical mound.
https://linernotes.club/system/media_attachments/files/107/796/183/580/575/247/original/494f65a2c32893cf.jpeg
This doesn't look good does it? It sounds bad too.
Any ideas what to do with a #speaker cone that has this kind of inversion in the centre piece?
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