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 ...