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Join Date: Aug 2004
Location: sierra ecuadoriana
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Well, ideally the in-walls should be in their own back boxes, set into the stud spacings.
But placing 2x pieces forming the top/bottom of the "box" will work, just make sure you seal the framing members to the back.
And you do want insulation in the box. That does two things. First it increases the virtual volume of the box, and provides damping that cuts down resonance frequencies.
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