Join Date: Jun 2003
Location: Maple Grove, MN
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Why the denim and InsulShield? Seems redundant. You just need to fill the cavity to reduce resonances. Why denim? fiberglass would do the job too.
Wall should be as a stiff as possible. MDF and 2 layers of drywall with green glue in between. Cover with 1"-2" black 1.5pcf fiberglass to absorb reflections back off the screen.
Do you know where your speakers are going? If crossing at 80Hz, then keep them at least 3.5' from the side walls to prevent a cancellation from occurring. Subs may want to be kept within 3.5' of sidewalls for same reason, to keep the notch outside of their range.
Are the speakers crossed over for a baffle wall? Baffle step correction is applied to most speakers to account for the bass loss from a free standing speaker cabinet. Even some in-wall units may not have the proper crossover.