Hmmm... some tough criteria, conditions. Some of these solutions also may not be acceptable, but here goes:
Portable/movable sound panels. Take em out when listening, roll them away when not. Use for personal enjoyment of system, and keep tucked away when entertaining.
Window treatments or retractable sound fabric "wall" for window/door
I presume you already have considered sizable floor rug and potentially stuffed furniture with cushions, etc.
Portable/movable sound panels. Take em out when listening, roll them away when not. Use for personal enjoyment of system, and keep tucked away when entertaining.
Window treatments or retractable sound fabric "wall" for window/door
I presume you already have considered sizable floor rug and potentially stuffed furniture with cushions, etc.