I leave Sox on my Dbots all the time too. The blue Sox match the Malibu blue pretty good & I think it looks as good as the black/chrome speakers.
You could spray just about any waterproofing on the Sox & it would help them repel more water if thats a concern. As mentioned in another thread,
this Aqua-Tite stuff would make a paper towel totally waterproof. The possible problem is that it could seal water INSIDE too.