What Causes Sudden Crackling and Hoarse Sound in Car Audio?

[Costa]

It could be an issue with the head unit. If you notice the left and right channels of the audio are affected, first check if the balance knob on the head unit is in the center position. Then verify whether the level control knobs for the front input and output are set equally for both left and right channels, as well as whether the input sensitivity settings for the amplifier's left and right channels are identical. Here are detailed explanations: No sound from tweeter: If one tweeter has no sound, first check if the wiring to the crossover is properly connected. Then use a multimeter to measure whether there's any signal at the crossover end - it might be caused by mistakenly connecting the speaker wire input to the woofer output. Excessive accompanying noise: When playing audio with excessive noise, this fault requires checking whether the negative terminal of the RCA signal connector is properly connected.