Acoustics: Sound Fields, Transducers and Vibration, 2nd Edition

6.17. Transient response

The design of a loudspeaker enclosure and the choice of amplifier impedance eventually must be based on subjective judgments as to what constitutes “quality” or perhaps simply on listening “satisfaction.” It is believed by many observers that a flat sound–pressure–level response over at least the frequency range between 70 and 7000   Hz is found desirable by most listeners. Some observers believe that the response should be flat below 1000   Hz but that between 1000 and 4000   Hz it should be about 5   dB higher than its below-1000-Hz value. Above 4000   Hz, the response should return to its low-frequency value. It is also believed by some observers that those loudspeakers which sound best generally reproduce tone bursts ...