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<blockquote data-quote="winkychevelle" data-source="post: 8825387" data-attributes="member: 611804"><p>I do not think a metal floor would work well at least not without some stiffening bracing. And some stout deadener. </p><p></p><p>And mdf doesn't absorb sound. It rejects sound. </p><p></p><p>The whole point of the box is to separate the rearwave from the front wave or in the case of ported enclosures use the rearwave to couple with the front through tuning.</p><p></p><p>Birch is one of the best building materials because it is light and strong and fairly water resistant. </p><p></p><p>Mdf is adversely heavy and while it doesn't absorb water any faster the glue fails and it swells. </p><p></p><p>Birch swells when wet but when it dries it shrinks back mdf does not. </p><p></p><p>Honestly which would you use is pretty irrelevant for the most cases as long as the box is sufficiently braced. </p><p></p><p>Infinite baffle could be a candidate for you but most people don't like permanent modifications to cars.</p></blockquote><p></p>
[QUOTE="winkychevelle, post: 8825387, member: 611804"] I do not think a metal floor would work well at least not without some stiffening bracing. And some stout deadener. And mdf doesn't absorb sound. It rejects sound. The whole point of the box is to separate the rearwave from the front wave or in the case of ported enclosures use the rearwave to couple with the front through tuning. Birch is one of the best building materials because it is light and strong and fairly water resistant. Mdf is adversely heavy and while it doesn't absorb water any faster the glue fails and it swells. Birch swells when wet but when it dries it shrinks back mdf does not. Honestly which would you use is pretty irrelevant for the most cases as long as the box is sufficiently braced. Infinite baffle could be a candidate for you but most people don't like permanent modifications to cars. [/QUOTE]
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