Optimus 4-Inch Flush-Mount Speaker System (120-1746) Preparation Faxback Doc. # 34216 CHOOSING A LOCATION For the best performance, install these speakers on a solid, firm surface that does not vibrate at high volume levels. We recommend you mount the speakers in the door panels or the rear deck. NOTE: Cardboard or fiber panels are not good mounting surfaces. As you are deciding on a location, carefully inspect the area behind the proposed mounting surface. There must be a clear unobstructed area of at least 2 inches (50.8 mm) behind the panel. If it is a door location, check to be sure the window, window mechanism and window handle will clear the speaker. NOTE: Make sure the window opens and closes properly. (YO/EB 7/29/96)