Will sun exposure damage my speakers?


I have a window next to one of my newly purchased JM Lab Electra 926s and since I like their look without the grill, I was wondering if I was hardening my cone surrounds or not. They are fiberglass "W" cones so I suppose they are ok but I don't know for sure. Has anyone looked into this before? Thanks! Arthur
aball
Get yourself some liquid latex.  Foam surrounds that are failing absorb it like a sponge.  A few coats works wonders and adds years to the drivers. 
Yes keep them out of the Sun. As an engineer of 20 years in the polymer field you should keep your speakers out of direct sunlight.