Many of us have confronted the issue of unwanted sound leakage between rooms. Unfortunately some of what is considered standard practice for audiophile systems, such as speaker spikes, may exacerbate the problem. That said there are things you can do to help reduce the amount of leakage between rooms.
Reviews and advertisements sometimes describe how some piece of audio equipment will provide you the feeling of “being at a live performance”. Is this what you are really trying to achieve with your audio system?