Basics of a Listening Room

• The ideal room would have brick or cinderblock walls, a concrete floor, and a concrete ceiling.
• The room would be symmetrical in shape.
• All room-boundary surfaces would be non-parallel.
• The ceiling and floor would be heavily absorptive, with thick carpeting and underliner underfoot, and efficient acoustical panels above. The walls, too, would be heavily absorptive, with deadening material covering 100% of the wall surface in the listening half, and 50% of the wall surface at the loudspeaker end.