So, after we have placed our perfect speaker into a normal room the perfect Frequency response of our perfect speaker is so FUBAR (Fu<&ed Up Beyond Any Recognition). And there are so many discrete dips and peaks of quite substantial magnitude that a pretty sophisticated Equalizer is needed to correct that. Some may dispute that this frequency response, the one that includes the resonant field and the direct sound is the one that makes for our perception of tonality, but based on my own experiences in both pro-audio and high-end I beg to differ. The more even the in room, total summed response, the more natural the sound.