ABSTRACT
One basic limitation relating to the carefully calculated modal spread of some of the preferred
ratios of room dimensions, discussed in Chapter 12, is that they all presume hard-walled,
rectangular, empty rooms. The response of a loudspeaker in a carefully designed control room
tends also to be calculated in terms of the empty room response. Once a large amount (or
in some cases even a small amount) of equipment is placed in a room, both the modal
response and the transfer function from the loudspeakers to the listening position will be
altered, and sometimes drastically so.
