Be sure to look at the graph representing 0* and the corresponding impedance plot. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif Temperature changes the T/S parameters.
I've never had a problem, and I have the eclipse titanium which has been known for having the cones crack in the past. I just use armorall on the cone every now and again and that seems to work fine