OK, so I've had a few drivers with foam surrounds (2245s, 411s) reconed recently and I was wondering if the new foam will last any longer than the foam they used from the factory +20 years ago?

I assume there have been advances in foam technology; right?

What factors contribute to foam deterioration:

  • humitity
  • sunlight
  • over excursion (abuse)?
Thx..