Help identifying OEM / Original or Aftermarket JBL cones

[GordonW]

If you're concerned about dust... while you have the foilcal off, you can glue a small square of grille fabric on top of the screen wire in the center of the foilcal, so that it's underneath the foilcal when it's glued back on. That will do 99% of what the foam filter did.

[ivica]

If you're concerned about dust... while you have the foilcal off, you can glue a small square of grille fabric on top of the screen wire in the center of the foilcal, so that it's underneath the foilcal when it's glued back on. That will do 99% of what the foam filter did.

Thanks, for suggestion, but I have put "internal 'filter'". we shall see how it would last.