February 27, 2005

Screen Weights

A while ago I posted about how I completed a DIY projector screen. What I didn't mention is that it was not perfectly planar. To try and correct this, I braced it against the back wall with some 13" rods and the left, center, and right speakers pushing up against the frame. But I didn't want this to be the final situation, as that meant vibrations in the speaker cabinets would be affected by the frame and the other speakers. So today I built some weights to take the place of the speakers in pushing against the frame.

I built two of these weights. The construction is very simple. I purchased two 12" diameter melamine boards to serve as the base, and screwed a 3" black ABS cap into the center using 3/8" machine screws, washers, and nuts. I then leveled the base with level-adjusting floor protectors, 120° apart and 2" in from the edge. A 3' long section of black ABS pipe was inserted into the base cap, filled with sand, and then I put a cap on the top to close it off. No glue necessary; everything fits snug.

The resulting pipes are not very heavy, but have decent mass, and are capable of holding the screen's frame against the 13" rods. So the four corners of the frame are equidistant from the back wall, and the plane of the frame is relatively parallel to the back wall.

Posted by josuah at February 27, 2005 5:00 AM UTC+00:00

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