I have a MDF box made by cherry man customs .the box is 3 cubic ft with 2 XFL 10”s .I am having problems with box vibration. The box man told me putting drywall screws in the box where the go through the first wall and hit the port wall.Will these screws actually help prevent the box vibration at all or will I need to go back in the box and add some more internal bracing such as dowels? When I put my hand on the box when playing loudly it’s almost hard to even keep my hand on the box
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