Ok guys, i know that this will affect my speakers in some way, but i want to know how badly. Im redoing my door trims, and i have my expensive speakers to go into the car. I really dont want to have them on display, especially considering how easy our cars are to break into. My question is, will one sheet of vinyl really affect the mid-low tunes coming out of the 6.5" cone. The tweeter is going to be flush mounted, so its only the mids and lows that need to "surpass", if you shall call it, the vinyl. I dont think it really will. This way you cant really tell that my speakers are expensive, and lets me mount them solidly in the doors.