System still in progress. Room design by Rives. Octagonal design 22 X 19 X 9. Three layer drywall with soundboard center. Open channel around room - decoupled from house frame, sound-damped ventilation. Skylines, RPG B.A.D and sonex treatment. False ceiling behind listening position/absorptive. Quad.diffusors behind listening couch. AC via sub-panel, 4 30A lines, grounding grid. floor to ceiling passive traps in front corners. Nice family listening room replaces tv time most nights.