Speakers parameters index

Today ,we will talk about the Impedance,although this indicator performance do not impact the speaker sounds, it is better not to buy low-impedance, speakers recommended value is the standard of 8Ω.

It refers to the speaker input signal ratio of voltage and current. Input impedance of the speaker is generally divided into high impedance and low impedance.Higher than 16Ωis the high impedance of;lower than 8Ωis low impedance.Standard impedance is 8Ωin the of speaker power amplifier same with output power ,and low impedance speakers can get bigger power output, but impedance is too low will cause under-damped and the deterioration of the bass and so on. So although this indicator performance do not impact the speaker sounds, it is better not to buy low-impedance, speakers recommended value is the standard of 8Ω. Headphone impedance is high impedance--32Ω is common. The impedance of the power amplifier and can be marked for equivalent impedance, such as 4Ω output of 130W, roughly the equivalent of the output is 80W. There is an easily confused with nouns called "damping factor", which refers to the speaker impedance divided by the amplifier source resistance range is approximately 25~1000. Speaker cone paper after the signal has disappeared even oscillating several times to completely stop swinging, and coil voltage current and magnetic field of the issue can prevent parasite movements, this is the damping.The amplitude of the current is the damping effect depends on the current through the internal resistance of the amplifier output stage, this resistance was far lower than the nominal impedance of your speakers, a typical value is 0.1Ω, but because of the speaker voice coils in series resistor and the existence of the series resistance of the crossover network, damping coefficient hard to be 50.

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