Dear all:

I purchased a well used pair of 4312A:s the other day. This is the utility black version. I finally managed to carry them to the car and home and found that the previous owner had a cat. The speakers came without grilles and the sticky pleated surrounds are full of catīs hair and other domestic remnants. Any ideas on how to clean up/remove and refresh the surrounds?
Also: one cabinet was buzzing on test and I lifted out the woofer. One screw was loose and the T-nut had fallen out which might explain the buzz. The magnet vent hole seen from behind is open and I can see a more or less disintegrated dust guard up towards the pole piece. Some black dust had fallen into the cabinet. Shall I leave it? Cover the hole with something permeable?