How to reflect the sound of the speaker's impedance

Subjective sense of hearing and objective test of organic combination, only can fully and truly reflect the product reviews, and is no longer empty, one-sided, even exaggerated, whitewash, fictitious generalizations brags. But the current tend to focus only on frequency response curve, and discussion of the impedance curve, in fact the impedance characteristics of the loudspeaker system is really very important, many listen to the defects can reflected from the impedance curve. The main technical parameters of the
speaker system are generally marked with impedance, usually 4 or 8, this value is the nominal impedance, is a pure resistance value, the national standard GB7313-87 is 4, 8, 16. The impedance of speaker system is a complicated problem, it is said that there are no tens of thousands of words, and it is very difficult to understand. The impedance curve of the
tank does not appear obvious double hump, or only a single peak, it is not the design itself has a defect that it must be the production process error. The box volume is too large in dual Impedance Peak sometimes to see high frequency peak was significantly higher than low frequency peak, pour in the acoustic radiation is too small, making the resonant frequency of the whole system is too low, at this time to feel low dive to the deep, but still feel insufficient quantity sense, soft without force. If the impedance double peaks in the low frequency peak was significantly greater than that of the high frequency peak, then pour in the acoustic radiation is too strong, at low frequency has been excessive human ascension, quantity is big the, but transient response will take a turn for the worse, low-frequency level sense will be greatly damaged, "quantity" and "quality".