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During the sound reinforcement process, a pair of speakers suddenly disappeared, most of which is because the power amplifier on the output channel is overloaded, and the fast-melting fuse is blown. In this case, the fast-melting fuse of the same capacity is replaced, and the input signal of the power amplifier is reduced. Flat, you can resume normal operation. If the speaker is still silent after replacing the fuse, do not check the front device for any signal. Use the jumper method, that is, skip the previous device and insert the input signal of the previous device into the input end of the power amplifier. If it is still silent, the power supply of the power amplifier may be damaged or the power of the two channels may be burned out. Ensure that the sound reinforcement continues, and the power amplifier should be replaced as soon as possible. It is unlikely that two speakers will burn at the same time...

1. The sensitivity of the left and right channel speaker speakers is inconsistent. The speaker output can be adjusted to be consistent by adjusting the output levels of the left and right channels. 2. The left and right channel output power signals are unbalanced, and the input and output gains of various devices on the left and right channels can be adjusted to approximately the same index value. 3. The average volume level of the left and right channels of the sound source is different. When the speaker is playing, two channels of sound imbalance are generated. It can be solved by adjusting the gain knob or channel fader of the input channel of the mixer to make the two-way speaker sound. The average volume is roughly the same.

1. Subjective perception of the frequency domain The important subjective feeling in the frequency domain is the pitch. The tone like the loudness is also the subjective psychological quantity of the auditory. It is the attribute of the auditory judgment of the sound level. The difference between the pitch in psychology and the scale in music is that the former is the tone of pure tone, while the latter is the tone of a composite sound such as music. The tone of the compound sound is not simply the frequency analysis, but also the function of the auditory nervous system, which is influenced by the listening experience and learning of the listener.

1. Subjective perception of the frequency domain The important subjective feeling in the frequency domain is the pitch. The tone like the loudness is also the subjective psychological quantity of the auditory. It is the attribute of the auditory judgment of the sound level. The difference between the pitch in psychology and the scale in music is that the former is the tone of pure tone, while the latter is the tone of a composite sound such as music. The tone of the compound sound is not simply the frequency analysis, but also the function of the auditory nervous system, which is influenced by the listening experience and learning of the listener.