My 6.5" speakers are under my bench seat. On the back of the speakers there is a white plastic cover to protect the magnet/cone from debris, water, etc. What in the world are these covers called? I am trying to find 2 more as I added 2 more speakers however, can't find anything online. I saw where it might be called a baffle however, that returns a bunch of in-wall items. Anyone know the proper name so I can google and find what I want? Better yet, anyone know where I can get some of these?

www.ssicustomplastics.com, speaker back covers

they are called, Marine water resistant capacitve inductorizing ionic shields , "AKA" speaker back cover.

Are they mainly for protection or do you get a better sound with them?

For protection
Worse sound

you can get them at pep boys, $9.95

Dragonheart...you are the man! These are the exact match of what I have...thanks much!