Home Theater Acoustic Panel Wall Build-Out

I am converting a 14 by 11 foot basement room into a dedicated home theater and need a carpenter or acoustic installer to build and mount custom soundproofing wall panels from scratch. The room shares one wall with a bedroom above and another with a shared stairwell, so the main goal is stopping mid and low frequency bleed from a 5.1 speaker setup and a subwoofer, not just cosmetic foam tiles. I am picturing a two-layer build: a base layer of 2-inch rigid mineral wool set inside resilient sound clips and hat channel to decouple the panel frame from the drywall studs, then a finished face of fabric-wrapped fiberglass panels in a dark charcoal acoustic cloth, framed with thin wood trim so the seams look intentional rather than patched. Panels need to cover roughly 220 square feet across three walls, leaving clear zones for the projector screen, two doorways, and an HVAC vent that cannot be blocked. I would like corner bass traps built into two of the room corners using the same rigid mineral wool core, plus a removable panel section over the equipment rack for cable access. All materials should be fire-rated for residential use, and I need help choosing an adhesive or mounting hardware that will not damage the drywall if panels are ever removed. Please include in your bid: rough framing and clip layout, panel fabrication method, fabric wrapping quality, how you plan to seal the door gap for the theater door, and an estimate of how many decibels of reduction a build like this typically achieves for mid-range dialogue leakage. Timeline target is under two weeks since a home theater seating delivery is already scheduled. Photos of the empty room, stud layout, and vent locations can be shared once we connect. Prior experience with recording studio or listening room builds is strongly preferred over generic drywall work.