AVS Special Member
Join Date: Jun 2005
Location: Northern, VA - Washington, DC
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With the projector on a tight mount to the ceiling - about 3" or so of stack height, plus the height of the projector to the center of the lens, call it 6" total, the top of the image will be 7" from your ceiling.
A cheap screen ill have a black border that's about 3" wide, so that means the actual top of your screen will be 3" from the ceiling.
A 120" screen is about 5' tall, add 6" for the screen border and 3" for the space above the top of the screen, and that means that between the floor and the bottom of the screen you have 1'2". That's not a lot of space, but it's certainly enough to put a center channel on a low speaker stand which is angled up to the listeners. It also is not at all the wrong place to put the screen and the center channel.
AV Integrated - Theater, whole house audio, and technology installation in the Washington DC metro area.