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  1. Closed box wall flextural strength.

    DIY Subwoofers - General Discussion
    OK, I've built the box 7.2 cu. ft., H22.5" x W22.5" x D24.5". Material is 3/4" MDF. Box is glued and screwed with additional reinforcing strips of 1.5" x 3/4" MDF along all wall, top, bottom, back, and sides. There are additional interior 1.5" x 3/4" MDF braces installed from sidewall to...
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