What s the deal with loudspeaker noise? What s going on with the loudspeaker all the time all of a s

The biggest possibility is that the audio input signal line is not shielded or the contact is poor, remove the connection cable to listen, if there is noise, it is the poor filtering of the power amplifier power supply or the poor signal connection cable in the machine, and the internal rough power amplifier may have this phenomenon, which has nothing to do with the speaker.

Mainly look at the audio cable The plugs at both ends of the audio cable are not in good contact.

It could be due to the following reasons:1. If the noise is a "hum" sound, it means that the AC component in the circuit is too large, and it is likely that there is a problem with the filter circuit of the loudspeaker power supply, especially the filter capacitor 2.

If it's that kind of "ziz" and "silky" ......In the case of sound, the fault is on the speaker, that is, the two speakers, to see if they are in good condition, if there is any foreign object falling into them, whether the edges of the vibrating paper (that is, the black layer of skin) are peeling off, and whether the vibrating paper is broken 3. Whether the speaker is firmly fixed and whether the fixing screws are loose You can remove the blue cover of the speaker housing (mine is also a rambler, blue), and then press the edge of the speaker with your hand to see if there is any noise, if not, it should be the problem in 2 or 3 above.

It is possible that the connection cable is broken, and the power amplifier power filter capacitor is broken.

Noise is a type of sound that causes irritability or excessive volume and endangers human health. From the perspective of environmental protection, all sounds that hinder people's normal rest, study and work, as well as sounds that interfere with the sounds that people want to listen to, are noise.

Let's see if there is any problem with the line first.

1. Turn the volume of the volume potentiometer to the lowest, that is, silent (no sound source in the morning), then the speaker should have no sound, if there is a hum sound, it is caused by the change of the capacity of the electrolytic capacitor in the filter circuit of the rectifier part of the power amplifier with the finch machine, the failure or the capacity is too small; If the amplifier is turned on loudly, there is a loud humming sound, it is caused by the poor shielding of the audio input of the amplifier, check and eliminate the shielding fault.

2. The shell of each original must be grounded, especially the audio input line must be shielded with a shielded wire, and the jacket wire must be prepared and well grounded.

3. The horn has a hissing sound, most of which is caused by poor overall shielding, or there is no isolation between the primary and secondary windings of the power transformer, and the isolation layer should be grounded.

4. Turn the power plug around to reduce the "hissing" sound, if it doesn't work, connect the two 4700p capacitors with a working voltage of 250V in series at the power input end (the power input end of the transformer), and the center tap is grounded, which can also be reduced.

5. Individual components are soldered, which is easy to cause noise caused by a slight vibration, and can be checked by gently tapping each element with chopsticks one by one.

There is no problem with the speaker,That's the problem with the signal cable from the host to the speaker,Check whether the plug is in poor contact,Or whether the signal cable is disconnected and there is an AC sound。 Directly change the signal line to solve the problem the fastest. This problem does not occur with normal hosts.

It's interference, and there's the power supply problem. Poor filtering. You start by moving it away from the vicinity of those devices. Estimated to be an internal power supply issue. It's not a computer power supply, it's an amplifier.

I can't go into enough detail to analyze it in general terms, I hope it will help you, unplug the audio cable between the computer and the amplifier, turn on the amplifier and speakers, turn the volume potentiometer to the maximum, and whether the speaker is noisy.

If there is, the problem is in the power amplifier Check the internal circuit, need to judge according to the noise, if not, the problem is in the connection line or computer part, but the computer failure is low, do not consider the key inspection of the connecting wire, wire, shielding net, plug and socket, any poor contact may lead to noise.