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KG4 Midrange Surrounds


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Sorry for posting this question in two forums, but now I'm a little concerned and time is of the essence. Thank you much.


I recently aquired another pair of KG4s. This pair

has a very light grey/green substance on the surrounds at rather random


I am familiar with the normal white powdery splotches in

the black, like that one sees on an inner tube, but I've never seen


The grey/green areas are smooth to the touch, and the surrounds seem to be intact with no splits.

Is this normal?

Thank you.

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