I have a room that is 15x12x9 ft cieling with an opening the size of a normal doorway that goes down a long set of stairs. I can listen to music at sane levels and not bother the rest of the house. Reference level with twin 20-39s does cause some of my family some annoyances.. Picture of opening: http://www.poopypampers.com/pix/DSCN1183.JPG My question is would I benefit from putting a door in here so I can close it? I'm wondering if it is worth the hassle. I'm kind of a car audio guy and to me it is just like having a window down, doesn't really effect the sound much. I'm sure if the opening was bigger you could say that the room was really bigger. Thanks for any info.