The first thing you should do is swap around speaker cables. (Hook the left speaker up to the right cable and vice versa)
You need to determine whether its the speaker or something further up stream.
If the sound stays with the speaker then you'll know its the speaker.
If it is not the speaker follow the same procedure with the upstream components until the source of the noise is ascertained.
You need to determine whether its the speaker or something further up stream.
If the sound stays with the speaker then you'll know its the speaker.
If it is not the speaker follow the same procedure with the upstream components until the source of the noise is ascertained.