Performance index of speaker

First,the power
This parameter is actually power to measure a multimedia speakers performance, just because the basic parameters of the manufacturer to evade, so in many products, power that has become a no significance of parameters.
Multimedia box labeled power mainly includes the following:
1 and rated output power (RMS)
2, the music output power (MPO) :
3, peak power output PMPO (music) :
Second, the frequency range and frequency response
This is the voice sound marking reductive ability two basic parameters, the former refers to the speaker minimum and maximum effective playback frequency range between frequency effectively playback Hertz (speed), unit, The latter refers to a constant voltage output audio signals connected with the speaker system, speakers of the pressure change of frequency increases or attenuation, frequency and phase change, this kind of phenomenon of pressure and phase and frequency of the relationship between associated called frequency response, unit decibels (dB).
Third, the distortion degree
The distortion degree is a signal amplifier amplification without prior to enlarge the signal amplifiers, through comparing the signal, and magnified with the original signal than differences.
forth, the signal-to-noise ratio
Generally speaking, multimedia speakers should be greater than the signal-to-noise ratio should be greater than 80DB, subwoofer 70DB. But only the signal-to-noise ratio of the speakers, than 90DB are eligible for himself "quasi HI - FI speakers."
Five, sensitivity
Sensitivity refers to produce the output power of the input signal and input signal is lower, the sensitivity is higher, the unit is decibels (DB)
Six, impedance
This concept is more complex, simple, the resistance will be a circuit, inductance and capacitance and inductance, 3 (resistance RongKang) vector sum of the unit is obtained, and the impedance resistance, also ohms. The speaker impedance are generally refers to mark the input impedance circuit. General multimedia speaker impedance in four ohms to 16 ohms, but also have greater. The multimedia speakers, impedance, the higher the quality will be better speakers, but also the hard drive.

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