Walls and ceiling are plaster-over-lath, with various windows and doors. Wall-to-wall carpeting, light drapes, soft seating and 18 sq ft of (hidden) sound proofing pyramid foam, provide sound absorption. Nodes are broken up by varying room dimensions.
The main speakers are aimed just slightly in front of the seated listeners head, and angled down to the same target.
The surrounds are located about 5' high due to the height of the mantelpiece. This is not optimal for home theatre, but the higher surrounds work well for filling the area with sound when used for the TV and FM radio.
Note that the Television set is slightly off-center. This is due to non-audio reasons, and is barely noticeable in operation.