Before I begin I would just like to say hello to everyone as I been lurking around for a little while. I recently got the mobile audio bug again and I'm going to do a custom job on the 2001 VR6 jetta. I will be going with MB Quaty components front and back, single RF 12" and the reference 4 channel from MB quart RA4200 for the mids and highs and a RF 700s for the sub. My question is mainly about the door baffles and how to protect the speakers from the environment?? I bought some XTC foam baffles to protect the speakers in the doors from water and crud, mainly slush in the winter months that may get into the doors. How will these things affect the SQ of the speakers?? Is there something else I should use?? Any and all comments are welcome.