What are the indicators of the good or bad of the speaker?

　　1. Power

　　There is no direct relationship between the sound quality and power of the speaker. The power determines the louder that the speaker can make, and it feels how shocking the sound of the speaker can be.

　　According to international standards, there are two ways to mark the power:

　　The rated power (RMS: sine waves) refers to driving a 8Ω speaker within the rated range to specify the continuous simulation signal of the waveform. After there is a certain interval and repeat a certain number of times, the speaker does not cause any damage to the maximum power;

　　Instant peak power (PMPO power) refers to the maximum power that the speaker can bear in a short time.

　　What are the indicators of the good or bad of the speaker?

　　The Federal Trade Commission stipulated the standard for power in 1974: driving a 8Ω speaker load with two channels, and the effective tile count measured when the harmonic distortion is really less than 1%in the range of 20-20000Hz, which is the amplifier of the amplifier. Output power, the label power is the rated output power. In order to cater to consumers' psychology, merchants are marked with instant (peak) power, which is generally about 8 times the rated power.

　　The power of the speaker is not as big as possible, the best applicable. For the 20 -square -meter room of ordinary family users, the real 60W power (referring to the effective output power of the speaker 30W × 2) is enough, but The larger the reserves of the amplifier, the better, it is best to be more than twice the actual output power. For example, if the speaker output is 30W, the power amplifier is best than 60W. For the HIFI system, the power amplifier power drives the speaker is very high.

　　2. Frequency range and frequency response

　　Frequency range: refers to the range between the minimum effective backing frequency and the highest effective return frequency that can be replaced by the audio system;

　　Frequency response: refers to the phenomenon of increasing or attenuation of the sound pressure generated by the speaker with the frequency of frequency, and the phase of the phase is performed when the audio signal that is connected to the system with a constant voltage output is The relationship between the associated between the phase and the frequency (variable) is called the frequency response, and the unit decibel (DB).

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