A: With few exceptions, acoustically transparent projection screens are flush-mounted to the wall directly in front of the speakers but never in direct contact with them. The distance between the acoustic screen material and the speaker should be a minimum of about 5mm to several inches. A speaker’s voice coil vibrates in the process of producing sound. If the driver(contains voice coil) is in direct contract with your screen material, your picture will vibrate along with the sound creating poor picture quality.