Pro-Driver gaskets?

[rich31td]

I have noticed that a lot of Pro-Audio drivers allready have a firm paper gasket on both the front and back of the basket.

My question is how well do these paper gaskets actually seal, in a sealed enclosure for instance, in comparason to the neoprene foam which is deisgned to compress to 1/3rd of its original thickness for a good seal?

 

[gmphadte]

Some molecules going in and out of the box will not affect the sound, but the neoprene will isolate the vibrations better.

Gajanan Phadte